#raspberrypi IRC Log

Index

IRC Log for 2015-01-23

Timestamps are in GMT/BST.

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[1:17] <Peetz0r> Anyone awake? I am using imagemagick to add timestamp data to raspistill (timelapse0 image output, but it's using a lot of cpu
[1:17] <Peetz0r> it takes 1.2 seconds to edit a 1280*720 image file
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[1:17] <abnormal> I am awake, but not know about your issue tho, sorry.
[1:18] <Peetz0r> err, 1600*900 actually
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[1:18] <Peetz0r> abnormal: okay :p
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[1:19] <abnormal> niston, would probably know...
[1:20] <Bilby> yeah that's closer to his baliwick
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[1:20] <Bilby> in my experience with imagemagick though i found it to be a bit of a resource hog
[1:20] <Bilby> since the 'edit' is so minor, is there any way to do it with a more simple package?
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[1:23] <Peetz0r> haven't found a way
[1:24] <Peetz0r> one thing I do know, adding this text requires decoding and re-encoding the full jpeg file which has just been encoded by raspistill
[1:25] <Peetz0r> also, raspistill barely uses any cpu, possibly because it uses the gpu to do jpeg encoding
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[1:25] <Peetz0r> it would be nice to add the timestamp before tat first encoding happens
[1:25] <Peetz0r> but that requires a raspistill option (which does not exist yet
[1:25] <Peetz0r> )
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[1:28] * Delboy (~openwrt@141-136-197-87.dsl.iskon.hr) Quit (Ping timeout: 246 seconds)
[1:28] <mitrick> hi i got a quick question will it change something if i buy the raspberry pi codecs from their site just for streaming from the video addons as woody or genesis ? better performance of not ? cuz i dont know if it's worthed buying for just streaming cuz i dont watch local videos
[1:28] <Triffid_Hunter> Peetz0r: it may grab a jpeg straight from the camera, lots of camera modules have onboard encoding for mp2, mp4, mjpeg, etc these days
[1:28] <Peetz0r> Triffid_Hunter: I am using the raspi camera, not some usb webcam
[1:29] <Bilby> OOoh new shiny https://www.tindie.com/poducts/IQaudIO/iqaudiocom-pi-amp-2x20w-class-d-audio-amplifier
[1:29] <Bilby> saw it in the tindie newsletter
[1:29] * igordcard (~overlayer@21.136.54.77.rev.vodafone.pt) Quit (Ping timeout: 245 seconds)
[1:29] <clever> Peetz0r: i think you can use the omx api to access the GPU jpeg features, so you could make a program that re-does the jpeg in gpu
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[1:30] <Peetz0r> clever: I could possibly also hack raspistill to add this for me I suppose
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[1:30] <clever> Peetz0r: but there is limited DMA features in omx, it would have to copy the raw image to the arm, then copy the whole image back
[1:30] <clever> depends on the path raspistill routes the image thru
[1:30] <Bilby> mitrick it depends on how you stream - if you're directly streaming those CODECs it should make them process in hardware, which is much more efficient
[1:30] <clever> Peetz0r: the raw image may never hit the arm
[1:31] * argakiig is now known as argakiig_lost
[1:31] <Peetz0r> but there's some point where (on the gpu) raspistill has acces to the raw data before it is encoded as jpeg? wouldn't is be possible to add the timestamp right there?
[1:32] <clever> yeah, but you may still have to copy the entire image to the arm, and back
[1:32] <clever> which will cause a decent latency and cpu usage
[1:33] <Peetz0r> I don't get it. But I've never actually coded for something that isn't a cpu :p
[1:33] <mitrick> i stream from the addons, genesis, vstream, woody channels in phoenix
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[1:33] <clever> Peetz0r: ive attempted to patch mplayer to use omx, so i know the api fairly well
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[1:33] <Bilby> mitrick sorry mate, not sure there
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[1:34] <Peetz0r> I'll try to get raspistill outputting bmp so imagemagick has to do encoding only, not decoding
[1:34] <Peetz0r> that would save half of the work, right?
[1:35] <Peetz0r> altough I suppose that encoding is way much more work than decoding
[1:35] <clever> and massively increase the SD card usage (enless you used a tmpfs)
[1:35] <Peetz0r> yeah, I use tmpfs
[1:35] <clever> along with arm cpu usage if you dont use omx
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[1:35] <Peetz0r> writing a jpeg every few second just to serve it over http is a bit silly :p
[1:35] <clever> but it would still be lower then jpeg->bitmap->jpeg
[1:36] <Peetz0r> let's see
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[1:36] * Peetz0r increases to 1080p, just to et bigger numbers and see bigger differences
[1:37] <clever> :D
[1:37] <Peetz0r> baseline is 1.7 seconds
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[1:37] <Peetz0r> blegh, docs state 'Note that unaccelerated image types (gif, png, bmp) will take much longer to save than JPG which is hardware accelerated.'
[1:37] <Peetz0r> still trying
[1:38] <clever> Peetz0r: fotoforensics.com can detect turning a jpeg back into a jpeg
[1:38] <clever> and uses the loss of quality to detect photoshops
[1:38] <Peetz0r> a 0.1s increase in raspistill might save 0.2s in imagemagick...
[1:38] <clever> because the stuff you add has better quality, from not being reprocessed as much
[1:38] <Peetz0r> oh
[1:38] * MageJames (~Magejames@cpe-071-075-062-008.carolina.res.rr.com) has joined #raspberrypi
[1:38] <Peetz0r> but uploading unedited photo's trough image-upload-sites also does re-encoding of jpegs sometimes
[1:38] <clever> yeah, ive noticed that with facebook before
[1:38] <Peetz0r> thing facebook -> imgur -> facebook -> imgur a few times :p
[1:39] <Peetz0r> think*
[1:39] <clever> the crisp text i uploaded, came out with slightly fuzzy edges
[1:39] <Peetz0r> I have been so silly to try uploading a 32bit aplha PNG to facebook once
[1:39] <clever> and its made worse by people who cant save the image
[1:39] <Peetz0r> the result was pretty ugly
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[1:39] <clever> and instead screenshot the whole app :P
[1:39] <clever> i often see photos on facebook, with giant letterboxing
[1:40] <clever> because the photo didnt fit the phone, and then just took a screenshot
[1:40] <Peetz0r> yeah, especially phone screenshots with huge black bars (and silly battery notifications) are stupid
[1:40] <Peetz0r> or literal screenshots (smartphone photo's of desktop monitors)
[1:40] <Peetz0r> oh well
[1:40] * veonik is now known as veonik_
[1:40] <clever> lol
[1:41] <clever> when i was working on the mplayer and omx patch, i also ran into YUV corruption
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[1:41] <clever> YUV encodes a 2x2 pixel block as 5 bytes i think
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[1:41] <clever> but you cant have a sharp contrast within that 2x2 block
[1:41] <clever> one of my screenshots was off-set by 1 pixel, causing everything to come out horid
[1:42] <clever> at 5x zoom
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[1:42] <clever> Peetz0r: http://gallery.earthtools.ca/index.py/paste/before.png here it is
[1:42] <Peetz0r> ah, the bmp thing works in 1.2 seconds (40% faster) but reading exif data obviously fails :p
[1:43] <clever> if you zoom in on the white/yellow edge, youll see it isnt clean
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[1:43] <clever> because the mplayer window was offset by 1 pixel, the YUV of the image didnt line up with the YUV of the screenshot
[1:43] <clever> and it got mucky
[1:44] <clever> and this is an example of when everything on the pi was just wrong, http://gallery.earthtools.ca/index.py/paste/color.png
[1:44] <Peetz0r> heh, I don't have to zoom in, superlow-dpi-screen here :p
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[1:44] <clever> and an example of an entire channel missing, http://gallery.earthtools.ca/index.py/paste/y.png
[1:44] <clever> YUV stores the Y plane at half the resolution, 1 byte per 2x2 block, brightness only
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[1:45] <clever> UV then give color, 1 byte of U and 1 byte of V per pixel
[1:45] <clever> UV 0,0 give green
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[1:45] <clever> so with just Y, you get shades of green
[1:48] <Peetz0r> so using bmp instead of jpeg helps a bit, but possibly not enough
[1:48] <Peetz0r> I am using the timelapse function to take still shots as fast as possible
[1:49] <clever> let me see if i can find the pdf
[1:49] <Peetz0r> using long exposure times during the night (now) but much shorter exposure times during the day
[1:49] <Peetz0r> resulting in less time available for each imagemagick run
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[1:50] <clever> Peetz0r: https://github.com/raspberrypi/firmware/tree/master/documentation/ilcomponents
[1:50] <clever> i believe you want image_encode
[1:51] <clever> let me see if i can find a better link
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[1:54] <clever> Peetz0r: http://ext.earthtools.ca/docs/image_encode.html
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[1:54] <clever> Peetz0r: using that component, you can turn bitmap into jpeg, using the GPU acceleration
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[1:55] <clever> https://www.khronos.org/registry/omxil/specs/OpenMAX_IL_1_1_2_Specification.pdf has more details
[1:55] <clever> and for the rest, you would have to disect examples like hello_video
[1:56] <Peetz0r> I think this goes quite a bit outside of my comfort zone
[1:56] <Peetz0r> (which is mostly writing shell or python scripts to get high-lever stuff to do what I want)
[1:56] <clever> it was a pretty steep learning curve for me as well
[1:57] <clever> i managed to get full hardware decoding of h264 video in mplayer, with hardware scaling
[1:57] <clever> but the frames come out in the wrong order
[1:57] <Peetz0r> would it be possible to write (or find) a hardware accelerated version of imagemagick (or something comparable) for the pi?
[1:58] <clever> maybe, i think i heard about somebody making one somewhere
[1:58] <clever> would have to check the forums
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[2:00] <Peetz0r> I have only found http://blog.sunekaae.com/2013/04/imagemagick-resize-speed-on-raspberry-pi.html
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[2:00] <Peetz0r> which is about different methods of resizing images
[2:01] <Peetz0r> but I don't need to resize, therefore most of the article doesn't apply to me
[2:01] <clever> *looks*
[2:01] <Peetz0r> it's just 'hey, this methond of resizing is faster than this other method', not much else
[2:02] <clever> http://raspberrypi.org/forums/viewtopic.php?f=33&t=57721&p=672095
[2:02] <clever> this is code for decoding jpeg files in GPU
[2:02] <clever> with a bit of tweaking you can possibly reverse that
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[2:37] <Peetz0r> clever: this is the stream now: http://stream.haas-en-berg.nl/
[2:39] <Peetz0r> I should compare load average numbers during night (long exposure, low framerate) and day (short exposure, hight framerate, more imagemagick invocations per time)
[2:39] <clever> got another system to run cacti+mysql?
[2:39] <Peetz0r> I have a system with munin, I could make this pi a munin-node
[2:39] <Peetz0r> actually, I *should*
[2:40] <Peetz0r> what's the point of having munin of not this :p
[2:40] <Peetz0r> if*
[2:40] <clever> another system monitoring script?
[2:40] <Peetz0r> yeah
[2:40] <clever> http://ext.earthtools.ca/export/temps_59.html
[2:40] <clever> ive customized my cacti to poll some custom services
[2:40] <Peetz0r> http://munin.haas-en-berg.nl/localdomain/localhost.localdomain/speedtest.html
[2:40] <clever> i have a network of ds18b20 temp sensors all over the house
[2:40] <Peetz0r> I've written a munin plugin to annoy my ISP :p
[2:40] <clever> which cacti graphs
[2:40] <clever> lol
[2:41] <Peetz0r> yes, 35/70
[2:41] <clever> i used to have such graphs directly from my router
[2:41] <clever> back when my router ran linux on a desktop
[2:41] * Sir_Pony (~rawr@2606:a000:b484:8500:455b:255a:a754:5d4b) Quit (Read error: Connection reset by peer)
[2:41] <Peetz0r> no, those are possibly 'current bandwidth usage', mine are 'speedtest.net results' :D
[2:41] <clever> heh
[2:41] <Peetz0r> yes, I burn many TB's of data each month just for those graphs
[2:41] <Peetz0r> noone cares :p
[2:42] <clever> http://ext.earthtools.ca/export/exported_laptop_65_leaf.html
[2:42] <clever> this is one of the random silly tests i made
[2:42] <Peetz0r> but that's in the old house
[2:42] <clever> its graphing the room temp, cpu temp, and cpu usage
[2:42] <clever> at times, i can see a match between room and cpu temp
[2:42] <clever> when the cpu load is steady
[2:42] <Peetz0r> (parents divorced, home server with house 1, raspi camera in house 2)
[2:42] <clever> because the heatsink is only capable of keeping a difference
[2:42] <clever> ah
[2:42] <Peetz0r> (both have fiber running to them :D )
[2:42] <clever> i have fiber here too
[2:43] <clever> thats why i lost the old linux router
[2:43] <clever> my router was a 200mhz pentium desktpp
[2:43] * Mrloafbot_ (~Mrloafbot@d199-74-229-81.try.wideopenwest.com) Quit (Quit: Leaving)
[2:43] <clever> the dsl would eat about 60% of the cpu power ni it
[2:43] <clever> the fiber, crippled it :p
[2:43] <Peetz0r> but house 2 also had a always-on laptop running kodi and not-web-accessible munin
[2:43] <Peetz0r> maybe I should make ssh tunnels and get all those munins together
[2:44] <clever> the crap router my isp provided cant even give usable byte counters
[2:44] <Peetz0r> also, I should make a raspi cpu temp plugin :)
[2:44] <clever> the byte traffic counters are stuck at 2^31 50% of the time
[2:44] <clever> can you see why?
[2:44] * Yoofie (~chatzilla@75-114-201-198.res.bhn.net) has joined #raspberrypi
[2:45] <Peetz0r> 2^31? that's the max of a singed 32bit integer
[2:45] <clever> yep
[2:45] <clever> the router is converting unsigned 32bit into signed 32bit
[2:45] <Peetz0r> also 1 + the number of milliseconds I have set as timeout for raspistill :p
[2:45] <clever> and instead of wrapping, it clips
[2:45] <clever> so every time the byte count goes over 2^31, it just stops counting
[2:45] <Peetz0r> can't you replace the router with something else?
[2:45] <clever> until another 2^31 bytes passed
[2:46] <Peetz0r> or flash openwrt or dd-wrt on it?
[2:46] * Willchill (~Willchill@CPE-121-220-37-151.lnse2.win.bigpond.net.au) Quit (Ping timeout: 245 seconds)
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[2:46] <clever> no open firmware will work on this junk
[2:46] <Peetz0r> aargh
[2:46] <clever> and the replacement must support 802.1q
[2:46] <Peetz0r> vlan stuff?
[2:46] <clever> the fiber modem is spewing 802.1q packets
[2:46] <clever> yeah
[2:46] <clever> one vlan is internet, one is tv
[2:46] <clever> and there are rumors of a 3rd vlan to backdoor the router
[2:46] <Peetz0r> vlans 34 and 4 by any chance?
[2:47] <clever> 33 and 34 i think
[2:47] <Peetz0r> ah
[2:47] <clever> i have notes somewhere
[2:47] <clever> yeah, vlan 34 is the tv service
[2:47] * dansan (~daniel@76-215-41-237.lightspeed.ftwotx.sbcglobal.net) has joined #raspberrypi
[2:47] <Peetz0r> oh, 34 is internet, and 4 is iptv here
[2:48] <clever> have you looked into the iptv much?
[2:48] <Peetz0r> also, my isp has instructions on how to configure it yourself on their own website :)
[2:48] <Peetz0r> https://blog.tweak.nl/hardware/vlan-configuratie-bij-gebruik-eigen-apparatuur/
[2:48] <clever> nice, my isp doesnt seem to be exposing that much
[2:48] <clever> the tech barely knows what he is doing during install
[2:48] <clever> if the stb doesnt bootup, replace random hardware
[2:49] <Peetz0r> clever: yes and no, I have done some stuff with the iptv platform of another ISP, but decided to go internet-only for now (saves money, and the few non-crappy stations have streams on their website *and* a (non-official but working) kodi plugin)
[2:49] <clever> from my notes, everything is over rtp, like rtp://239.42.151.7:8208/
[2:49] <clever> if you join that multicast group, the router automaticaly spams you with rtp packets for the channel
[2:50] <Peetz0r> possible the same happens here
[2:50] <clever> even the raspberry pi could work, as long as it doesnt overtax the usb
[2:50] <clever> and if a laptop on wifi joins, it will practicaly DoS the wifi :P
[2:50] <Peetz0r> are the streams h264 or mpeg2?
[2:50] <Peetz0r> yeah, some things shouln't be done over wifi
[2:50] <clever> h264, plus mp3, plus aac
[2:50] * ToBeReplaced (~ToBeRepla@63.228.74.60) has joined #raspberrypi
[2:50] <clever> everything is mpegts
[2:51] <clever> whcih the usual crypto
[2:51] <Peetz0r> but my streams (unicast http 1 mbit/s) work fine over wifi :D
[2:51] <Peetz0r> they even worked fine on a 3g hotspot :p
[2:51] <clever> unicast has higher loads on the server
[2:51] <Peetz0r> yeah, not my problem :D
[2:51] <clever> multicast, the server wont even notice
[2:52] <Peetz0r> yeah, but my streams come from the actual internet, not from an iptv network from my ISP
[2:52] <clever> if i could just break the encryption, then i could turn my raspberry pi into an STB
[2:52] <clever> massively smaller compared to the beast they provide
[2:52] <clever> if i remember correctly, the crypto is just xor against a PRNG bitstream
[2:52] * amigojapan (~amigojapa@c119045.net21845.cablenet.ne.jp) has joined #raspberrypi
[2:52] <Peetz0r> http://www.npo.nl/live/npo-1 (they check geo-ip so you'll probably not see anything but stil)
[2:53] <clever> that reminds me
[2:53] <Peetz0r> (also, unless you have a dutch VPN somewhere)
[2:53] <clever> i once ran a squid proxy for caching
[2:53] <clever> and squid was setup to advertise the client ip, 192.168.1.x
[2:53] <clever> one website my dad was viewing, did geo-ip on that
[2:53] <clever> (facepalm)
[2:53] <clever> it failed to resolve his country (private lan space), and let him in
[2:53] <clever> when it shouldnt have :P
[2:53] <Peetz0r> lol
[2:53] <Peetz0r> but useful :D
[2:53] <clever> he later turned the proxy off trying to fix random stuff
[2:54] <clever> and lost access
[2:54] <clever> and it doesnt appear to be locking me out
[2:54] <clever> its saying i need to install flash
[2:54] <Peetz0r> but how could that happen? the source ip as seen from their server, should just be the public ip of the proxy?
[2:54] <clever> some people will try to cheat using a proxy
[2:54] <clever> and some proxies are setup to reveal the real client ip
[2:55] <clever> the website was setup to trust the proxy too much
[2:55] <clever> to un-cheat the users
[2:55] <Peetz0r> they did geo-ip on X-Forwarded-For headers?
[2:55] <Peetz0r> wow
[2:55] <clever> yep
[2:55] <Peetz0r> never trust user data, http request headers are user data
[2:55] <clever> except X-Forwarded-For was giving private lan addresses
[2:55] <clever> so it failed :P
[2:55] * ztaale (~bleh@ti0098a400-0308.bb.online.no) Quit (Read error: Connection reset by peer)
[2:56] <clever> this also goes into another incident
[2:56] <Peetz0r> I have once seen sql injection in a thing that stored user agents
[2:56] <clever> one day i was browsing netflix on my linux laptop (it doesnt play, but i can browse)
[2:56] <clever> and i noticed, they have star trek now!?
[2:56] <Peetz0r> star trek ftw
[2:56] <clever> so i switched to the windows desktop, did a search
[2:56] <clever> 'not found'
[2:56] <clever> i copied the url from linux, pasted on windows, i got the home page
[2:56] <Peetz0r> wait, your linux machine was using the proxy?
[2:57] <clever> my linux machine had proper ipv6 support
[2:57] <Peetz0r> ah :D
[2:57] <clever> and my isp lacks ipv6, so it was using a ipv6 tunnel
[2:57] <clever> ipv6 geo-ip said i was in the states
[2:57] <clever> ipv4 geoip said i was in canada
[2:57] <clever> so netflix was giving me the american lineup on linux
[2:57] <clever> and the canadian lineup on windows
[2:57] <Peetz0r> so they haven't released stat trek on netflix in canada?
[2:57] <Peetz0r> surprises me
[2:58] <clever> once i installed windows ipv6, i gained acceess to all the good shows :P
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[2:58] <Peetz0r> I am in the middle of watching the TNG remasters now
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[2:58] <Peetz0r> also, not paying a single eurocet to netflix
[2:58] <Peetz0r> no added value for me :p
[2:58] * SirLagz bounces
[2:59] <clever> as for how i discovered the ipv6 stuff
[2:59] <clever> the footer on the netflix source
[2:59] <clever> <!-- {"ip":"127.0.0.1","signup":"CA","geo":"CA","locale":"en-CA"} -->
[2:59] <clever> it used to show my public ip
[2:59] <Peetz0r> and it shows 127.0.0.1 whenever you're on ipv6?
[2:59] <Peetz0r> that's silly :p
[2:59] <clever> i dont know when it started doign 127
[3:00] <clever> ipv6 is off right now
[3:00] <clever> i can see 6 hits for star trek
[3:00] <clever> now i open it on a ipv6 enabled machine
[3:00] <clever> 15 star trek shows
[3:01] <clever> and the footer still says 127, but it also says "geo":"US"
[3:01] <Peetz0r> 15? wow
[3:01] <clever> i htink they installed a reverse proxy
[3:01] * ValicekB (~tbox@dot.snat.baz.cz) Quit (Ping timeout: 252 seconds)
[3:01] <Peetz0r> TOS, TAS, TNG, DS9, VOY and ENT... i count 6
[3:01] <clever> now to list them off, with ipv6, startrek undiscovered country, generations, original, motion picture, tng
[3:01] <clever> final frontier, wrath of khan, nemesis, voyage home, search for spock
[3:01] <Peetz0r> oh, they add the movies
[3:02] <clever> into darkness, voyager, enterprise, ds9, and the animated series
[3:02] <clever> if i do the same search on ipv4, i get tng, darkness, generations, insurection, nemesis, and first contact
[3:02] <clever> odd, america lacks first contact
[3:03] <clever> and ive never even heard of the animated series
[3:03] <Peetz0r> that's the best (or at least, most populair if you don't count the reboot) movie
[3:03] <Peetz0r> first contact I mean
[3:04] <clever> ah
[3:04] <Peetz0r> I have never seen TAS
[3:04] <clever> so they are locking it out in america to force you to buy the dvd :P
[3:04] <clever> but they just dont care in canada
[3:04] <Peetz0r> have to finish TNG first
[3:04] <Peetz0r> then hope for bluray versions of VOY and possible DS9
[3:04] <clever> another show that i got half way thru watching on the ps3, before they fixed the ipv6 hole
[3:05] <clever> eureka
[3:05] <clever> it just doesnt even appear on v4
[3:05] <Peetz0r> maybe they are working on ipv6 issues, and print this debug info only for ipv6 requests
[3:05] <clever> that debug is always present
[3:06] <clever> it used to also include the AWS EC2 instance id
[3:06] <clever> oh, it still does
[3:06] <clever> ipv6 is connecting me to instance i-b3d47442
[3:06] <clever> v4 connects to i-79aa0a88
[3:06] <clever> another weirdness, netflix lets you search by people
[3:07] <clever> if i search ipv6 for 'ed quinn', i get 4 shows including eureka
[3:07] <clever> v4, it claims that he doesnt even exist
[3:08] <Peetz0r> ah, an actor which I have never heard of :p
[3:08] <clever> i'm not exactly sure who he plays in the show either, lol
[3:09] <clever> i just grabbed a random name out of the cast
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[3:10] <clever> Peetz0r: heh, and if i try to find star gate on v4, it will atleast confirm it exists, but instead lists every sci-fi show on the system
[3:10] <clever> hmmm, v6 does the same
[3:11] <clever> they must have taken it down on both
[3:11] <clever> another part of my crap router
[3:11] <clever> 404 Not Found
[3:11] <clever> this WAS cacti auto-refreshing
[3:11] <clever> File not found.
[3:11] <clever> micro_httpd
[3:11] <clever> except, now, its an error from the router
[3:13] <clever> the router is unable to port-forward traffic coming from inside the lan
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[3:27] <clever> Peetz0r: http://hackaday.com/2015/01/22/reprogramming-super-mario-world-from-inside-the-game/
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[4:01] <ziikutv> hey guys
[4:02] <ziikutv> Might be off topic but how do certain pins allow to be "read/write" to by simply accessing a file such as /sys/devices/virtual/misc/gpio/mode/ (linux only)
[4:02] * skyroveRR (~skyroveRR@unaffiliated/skyroverr) Quit (Read error: Connection reset by peer)
[4:02] <ziikutv> https://learn.sparkfun.com/tutorials/programming-the-pcduino/accessing-gpio-pins
[4:02] <ziikutv> Someone said something about virtual file system but how is that mapping done?
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[4:29] <clever> ziikutv: all of /sys is a virtual filesystem, any attempts to read/write from it simply get routed to functions in the kernel
[4:30] <clever> so when you write to a direction control 'file', it calls a function that changes the mode
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[4:35] <ziikutv> clever: OKay but did the makers of this board put those functions in therre or?
[4:35] <clever> i believe the team doing the kernel work created functions that expose the gpio pins to the existing gpio framework in the kernel
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[4:36] <clever> i know where the code is
[4:36] <clever> https://github.com/raspberrypi/linux/blob/rpi-3.18.y/arch/arm/mach-bcm2708/bcm2708_gpio.c
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[4:37] <clever> the key part for direction control is line 365 and 366
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[4:38] <ziikutv> So the microcontroller manufacturer did not change the OS at all?
[4:38] <clever> they added that file to the kernel source
[4:38] <ziikutv> Okay
[4:39] <ziikutv> So the function calls THOSE methods when it detcts a funky path
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[5:11] * c^ (~ChipUK@unaffiliated/chipuk) Quit (Quit: <G80R> Wiring is probably dildos. Hello Chip.)
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[7:02] * Mogwai (~mogwai@76-10-161-183.dsl.teksavvy.com) Quit (Read error: Connection reset by peer)
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[7:04] * theorist (~Astoundin@c-75-67-50-34.hsd1.nh.comcast.net) has joined #raspberrypi
[7:04] <theorist> Anyone ever burned up their pis usb ?
[7:04] <u-ou> not me
[7:04] <theorist> just start connecting pins to ground its easy
[7:05] <theorist> jk but something terrible happened when I was trying to use an hbrdige board
[7:05] <theorist> and now my pi has no usb and I smelled burning electronic smell
[7:05] <theorist> https://www.bananarobotics.com/shop/HG7881-%28L9110%29-Dual-Channel-Motor-Driver-Module
[7:05] <theorist> 12v bench supply to vcc, gnd to bench supply gnd, IA to gpio pin
[7:06] <theorist> I expected pin set to output high would turn on the motor
[7:06] <theorist> instead the board just got hot BUT it was connected to a crappy wall wart supply that I later tested at over 16v
[7:06] <theorist> then I tried with a 9v battery and again the board just got really hot
[7:06] <abnormal> sounds like it is fried
[7:07] <theorist> this time I tried it with my bench supply and nothing happened again maybe because the board was already burned from the 16+ volt supply
[7:07] <theorist> so I started connecting random things like IA to ground
[7:07] <theorist> and then smelled the magic smoke
[7:07] <theorist> so at this point I have 5 more of these boards a pi with no usb
[7:08] <theorist> and I don't know if the board was defective, if I was using it wrong, or if it was destroyed by the 16v supply
[7:08] <theorist> if anyone has any insight it would be great
[7:08] <theorist> I'm referring to the incidents before the one that led to the destruction of my pi
[7:08] <theorist> with the 16v supply and the 9v battery and my description of how I was trying to use the board
[7:09] * leichtgewicht (~leichtgew@p32075-ipngnfx01osakakita.osaka.ocn.ne.jp) Quit (Remote host closed the connection)
[7:10] * leichtgewicht (~leichtgew@p32075-ipngnfx01osakakita.osaka.ocn.ne.jp) has joined #raspberrypi
[7:10] <abnormal> where are you applying the 16V?
[7:12] * Yoofie (~chatzilla@75-114-201-198.res.bhn.net) Quit (Quit: ChatZilla 0.9.91-rdmsoft [XULRunner 32.0.3/20140923175406])
[7:12] <theorist> it got applied to vcc on the hbridge board
[7:12] <theorist> and then the board got hot
[7:12] <theorist> but then the board also got hot with a 9v battery
[7:13] <theorist> but mayeb it was then shorted internally at that point?
[7:13] <abnormal> what is the board's rating?
[7:13] <theorist> 5-12v
[7:13] <theorist> or less even
[7:13] <theorist> 3-12v
[7:13] * leichtgewicht (~leichtgew@p32075-ipngnfx01osakakita.osaka.ocn.ne.jp) Quit (Read error: Connection reset by peer)
[7:13] <abnormal> is that the only board you have?
[7:14] <theorist> I have 5 more of them
[7:14] <theorist> but now my pi is unusable
[7:15] <theorist> I do have a 12v/5v bench supply though
[7:15] <abnormal> it won't boot?
[7:15] <theorist> it boots but right after I smelled the smoke when I connected motor 1 IA pin on the hbridge board to gnd for an instant
[7:15] <theorist> the pi froze
[7:15] * ponA (~Miranda@HSI-KBW-134-3-94-90.hsi14.kabel-badenwuerttemberg.de) Quit (Quit: Miranda IM! Smaller, Faster, Easier. http://miranda-im.org)
[7:15] <theorist> now there are no functioning usb ports
[7:15] <theorist> it loads noobs installer and booted arch
[7:15] <theorist> but no usb
[7:15] * RaptorJesus (~RaptorJes@gateway/tor-sasl/raptorjesus) Quit (Ping timeout: 250 seconds)
[7:16] <abnormal> so the USB chip is gone.... sorry
[7:16] <theorist> =S
[7:17] <theorist> are you certain? could there be any way to fix it?
[7:17] <theorist> the sooner I can be sure the sooner I'll order another pi
[7:17] <abnormal> when I do stuff like that, I buy the Piface or Gert boards
[7:17] <theorist> or begin repairs
[7:17] * leichtgewicht (~leichtgew@p32075-ipngnfx01osakakita.osaka.ocn.ne.jp) has joined #raspberrypi
[7:18] <abnormal> just don't use those little boards again... I don't trust them... Even an Arduino Uno would do fine... but not those little ones you have....
[7:21] <abnormal> The Piface has two relays on it.... The Gert board is very advanced. both of these will protect the pi regardless... The Arduino Uno is USB connectable and you send instructions to it and the uno will do its thing... also protects the pi.
[7:22] * nimoot (~HomoSapie@unaffiliated/toomin) has joined #raspberrypi
[7:22] <Yohio> and Arduino clones literally cost very little, if you don't want to shell out the money for a real thing
[7:23] <theorist> I'll look into those
[7:23] <abnormal> It is very touchy to trust yourself using the pi alone. just one mess-up the pi is fried.
[7:23] <Yohio> check ebay for cheap arduinos
[7:23] <Yohio> I ordered an Uno clone for under 3€ and it works fine
[7:24] <theorist> is it hard to connect those to the pi
[7:25] <abnormal> uno?
[7:25] <theorist> yeah
[7:25] <abnormal> they are USB connectable
[7:25] <abnormal> just plug and play
[7:25] <theorist> wow
[7:25] <theorist> sounds easier than this i2c nightmare I just dealt with
[7:26] <theorist> that still isnt over
[7:26] <abnormal> yes definately
[7:26] <theorist> so for less than 5 dollars you can add analog inputs to the pi?
[7:26] <theorist> plug and play to access the data over usb
[7:26] <theorist> ?
[7:27] <abnormal> to the uno, not the pi, all the pi does is tell the uno what to do...
[7:28] <abnormal> and if you have the uno to send info back to pi, it does it by the USB connection.
[7:29] <theorist> so you can connect an analog sensor to the uno, and have it send back its data to the pi
[7:29] <Yohio> yeah, arduino sends serial data and you read it with pi
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[7:34] * theorist is now known as theorist-sleep
[7:34] * Scriven (~UserName@S01063085a9395770.vc.shawcable.net) has joined #raspberrypi
[7:34] <theorist-sleep> data structures in the am, and researching pi repair. thanks for the advice
[7:35] * lupinedk is now known as Lupinedk
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[7:37] <abnormal> ok see ya later and good luck.. from now on, treat your pi as a very sensitive board....
[7:38] * Gadgetoid (~Gadgetoid@customers.shef1.resi.ask4.co.uk) has joined #raspberrypi
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[8:16] <kevireilly> ello. I’ve setup a RPI that creates an ad-hoc network and then renders a web page where you can select a wireless network and configure the RPI’s internet connection. I’m presently generating a wpa_supplicant.conf, but I’m not savvy enough with the various settings required for various encyption settings. I do have the general encryption type available, but is there something more fool proof for generating a config and
[8:16] <kevireilly> establshing a wireless connection? Other commands or installables?
[8:16] * skylite_ (~skylite@4E5C4FD6.dsl.pool.telekom.hu) Quit (Quit: Textual IRC Client: www.textualapp.com)
[8:18] <niston> theorist should verify if ethernet is gone too
[8:18] <niston> maybe he just blew the USB fuses?
[8:18] <niston> if the chip is gone, ethernet should be gone too (USB hub and ethernet are in same chip)
[8:18] <niston> anyway
[8:18] <niston> have to go
[8:19] * e^ipi (~e^ipi@165.225.131.66) Quit (Ping timeout: 252 seconds)
[8:19] <abnormal> yup he sure blew that one
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[8:38] <shrimants> hello
[8:38] <shrimants> anyone active on the chat?
[8:39] <antoon> yarr
[8:41] <nimoot> harr
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[8:50] * DrCode (~DrCode@gateway/tor-sasl/drcode) Quit (Remote host closed the connection)
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[8:51] * utack (~utack@ip9234cb8c.dynamic.kabel-deutschland.de) Quit (Remote host closed the connection)
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[8:58] * skylite (~skylite@business-178-48-4-145.business.broadband.hu) has joined #raspberrypi
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[9:00] <shrimants> i have a busted up laptop
[9:00] * DrCode (~DrCode@gateway/tor-sasl/drcode) has joined #raspberrypi
[9:00] * dreamon (~dreamon@unaffiliated/dreamon) Quit (Ping timeout: 252 seconds)
[9:01] <shrimants> i was hoping to repurpose its screen. i planned on using a raspberry pi as the input device, and ordered this controller board: http://www.ebay.com/itm/HDMI-AV-VGA-LCD-Controller-Board-Inverter-Kit-for-LP154WE2-TL-B2-1680X1050-/121378389240
[9:01] <shrimants> the merchant keeps saying he cannot guarentee 1680x1050 resolution, and im not understanding why
[9:02] <shrimants> obviously if my "pc" doesnt support that resolution, theres nothing to be done. but the rpi should support that resolution according to spec sheet
[9:02] <shrimants> so im not sure what im missing here. why would a controller baord for my specific monitor not be able to drive full screen native res?
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[9:19] * shrimants (6364b22f@gateway/web/freenode/ip.99.100.178.47) Quit (Quit: Page closed)
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[11:03] <q_a_z_steve> Is there a separate channel dedicated to RasPBX?
[11:04] <granden> Hi, anyone who have tried to install ez_setup on the rpi and got the following? https://paste.ee/p/JDX3q I dont really know what to do about this.
[11:04] * c00ljs (~c00ljs@201.76.171.30) has joined #raspberrypi
[11:05] <ShorTie> have you tried to join #RasPBX ??
[11:05] <antoon> it doesn't exist :p
[11:06] <ShorTie> then i guess there is not
[11:06] <ShorTie> or atleast on freenode
[11:06] <granden> If IT helps Im trying to follow this tutorial
[11:06] <granden> http://www.linuxuser.co.uk/tutorials/program-your-arduino-with-raspberry-pi
[11:06] <antoon> You *could* try #freepbx q_a_z_steve
[11:06] <granden> Maybe I could do some other way ? or missing something.
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[11:07] <ShorTie> Arduino Uno ??
[11:08] <q_a_z_steve> antoon: I think I will, and #asterisk
[11:08] <ShorTie> why not just use the Arduino IDE ??
[11:08] <granden> I need to run some more heavier things on the RPi and then communicate over USB with the arduino.
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[11:13] <ShorTie> thats all in your programs
[11:14] <ShorTie> have you tried using sudo to run that install ??
[11:14] <ShorTie> maybe it's a privilege thingy
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[11:49] <JakeSays> hey i was wondering if any of you hardware gurus have experience getting one-off PCB's made from gerber files
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[12:22] <gordonDrogon> JakeSays, yes, I have.
[12:23] <JakeSays> gordonDrogon: any suggestions on who i should use?
[12:23] <gordonDrogon> only if you're in the UK.
[12:23] <JakeSays> lol ah
[12:24] <gordonDrogon> and it'll cost in the region of �90.
[12:24] <JakeSays> i'm thinking of having a couple of these made: http://www.ti.com/tool/TIDM-PRINTERPACK#tiDevice
[12:24] * hunt3r (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) has joined #raspberrypi
[12:24] <gordonDrogon> therre are cheaper if you go to one of the many .cn fabs.
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[12:24] * moei (~moei@softbank221078042071.bbtec.net) Quit (Client Quit)
[12:25] <gordonDrogon> http://www.pcbpanel.co.uk/Home.html is who I use for prototyping.
[12:25] * hunt3r_ (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) has joined #raspberrypi
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[12:25] <JakeSays> lol apparently they're having issues: jos-Warning: JLIB_APPLICATION_ERROR_COMPONENT_NOT_LOADING
[12:28] <JakeSays> i wonder how reliable that TI design is. my fear is i have the boards made and then discover the design is busted.
[12:29] * hunt3r (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) Quit (Ping timeout: 256 seconds)
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[12:32] <ShorTie> not to try to throw water on your fire, but in the long run it might be cheaper/easier to get sumfin like this http://www.ebay.com/itm/Ramps1-4-Mega2560-DRV8825-LCD2004-MK2B-3D-Printer-Controller-Kit-RepRap-/281568339573?pt=LH_DefaultDomain_0&hash=item418ec7e675
[12:32] * Zombyrad (~Zombyrad@2a02:a03f:10ac:a600:ba27:ebff:fef3:6c1) has left #raspberrypi
[12:33] <JakeSays> ShorTie: :O holy crap.
[12:34] <JakeSays> the kit has all of that in it?
[12:34] * nimoot (~HomoSapie@unaffiliated/toomin) has joined #raspberrypi
[12:35] <JakeSays> ShorTie: that is *very* cool
[12:35] * leichtgewicht (~leichtgew@p32075-ipngnfx01osakakita.osaka.ocn.ne.jp) Quit (Read error: Connection reset by peer)
[12:35] <ShorTie> from the l@@ks of it
[12:35] <Uryupinsk> Hi guys! Do you know if there are some IRC channels about hardware controls/home automation with Raspberry Pi?
[12:36] <JakeSays> ShorTie: however i'm sort of starting with half a printer: https://dl.dropboxusercontent.com/u/410932/BeckmanThing.jpg
[12:36] <JakeSays> so i have the motors
[12:37] <JakeSays> but i may just order one of those kits for fun
[12:37] * hunt3r (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) has joined #raspberrypi
[12:38] <ShorTie> nice to have a known working combination, not sure all stepper motors are =
[12:38] <Datalink> hm, anyone have a good recommendation for a 12V to 5V inverter for the B+, this will be going into the GPIO so I'd prefer as safe as reasonable
[12:39] <JakeSays> ShorTie: yeah they're not, and these motors are *old* - that thing was made in '86
[12:39] <JakeSays> but it is rock solid
[12:39] <Datalink> ShorTie, there are 2 major families of steppers, unipolar and bipolar
[12:39] <Datalink> JakeSays, how many wires, 4 or 6?
[12:39] <ShorTie> why the gpio bypassing the safty of the micro-usb port ??
[12:40] * hunt3r_ (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) Quit (Ping timeout: 276 seconds)
[12:40] <ShorTie> lots of nice 3amp dc-dc buck converters out there on ebay
[12:40] <Datalink> ShorTie, embedded application, I have a 12 volt rail and I'd prefer not to have extra rails
[12:40] <JakeSays> Datalink: it has 6, but only 4 are in use. i suspect its a unipolar motor operating in a bipolar configuration
[12:41] <Datalink> JakeSays, sounds like a good assessment
[12:41] <ShorTie> doesn't really answer the ?? does it ??
[12:41] <Datalink> ShorTie, because I'd rather have 1 power plug to the wall instead of 2
[12:42] <Datalink> this isn't for me, so I'd prefer to simplify where I can for my friend
[12:42] <JakeSays> Datalink: i think what he's saying is have your inverter connect to the microusb instead of the gpio
[12:42] <ShorTie> so, ya you only need 1 with a buck converter, but feed it into the micro-usb port instead of the gpio pins
[12:42] * hunt3r (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) Quit (Ping timeout: 265 seconds)
[12:43] <JakeSays> whats a buck converter?
[12:43] <Datalink> I have to step down the 12 volts to 5 for other parts anyway, so I may as well provide clean power
[12:43] * MageJames (~Magejames@cpe-071-075-059-040.carolina.res.rr.com) has joined #raspberrypi
[12:44] <ShorTie> http://www.ebay.com/itm/DC-DC-3A-Buck-Converter-Adjustable-Step-Down-Power-Supply-Module-LM2596S-/201269388082?pt=LH_DefaultDomain_0&hash=item2edc972332
[12:44] * hunt3r (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) has joined #raspberrypi
[12:44] <Datalink> I guess I could build one of those on the board, sure
[12:44] <JakeSays> ShorTie: oh wow. cool.
[12:45] <ShorTie> build, why not buy already done and just mount it to the board
[12:45] <Datalink> again, I'd prefer this to be clean power going on the 5 volt rail, I have other ICs where it will be a concern
[12:45] <ShorTie> heck of alot cheaper in the end
[12:45] * sdel (~sdel@ip68-108-143-9.lv.lv.cox.net) Quit (Ping timeout: 252 seconds)
[12:45] <Datalink> I have to fab the board anyway for this project
[12:45] <JakeSays> man, that is cheap
[12:45] <JakeSays> ShorTie: you are full of handy links
[12:46] <Datalink> I'm not sourcing from e-bay, I have quality standards I'm trying to uphold since this is going to be a business partner
[12:46] * hunt3r (~hunt3r@aruba-ctlr4-nat.its.manchester.ac.uk) Quit (Client Quit)
[12:46] <ShorTie> so, it just alittle space and four holes on your fab board
[12:46] <Datalink> ebay's great when you gotta make a widget, not so good when you've gotta make a product
[12:46] <ShorTie> why not ??
[12:46] <ShorTie> it's all made in china anyways, lol.
[12:47] <JakeSays> Datalink: yeah but i'm just tinkering - and i'm 98.7% sure i'll blow stuff up at least once, so cheap is good in this case.
[12:47] <Datalink> JakeSays, heh, yeah, like I said, ebay's great for the tinkerer
[12:48] * MageJames (~Magejames@cpe-071-075-059-040.carolina.res.rr.com) Quit (Ping timeout: 245 seconds)
[12:48] <pksato> Datalink: you asking for design recomendation? not for products?
[12:48] <Datalink> pksato, yes
[12:48] <JakeSays> i have a stack of old iphones and ipads that i'd love to repurpose.
[12:48] <JakeSays> especially the screens
[12:48] <Datalink> asking here can sometimes cut my research time for Pi related stuff from hours to minutes :P
[12:49] <Datalink> JakeSays, there are kits out there to use the screens, I'd have to google them again though... I know of at least one that's HDMI to iPhone/iPad screen, but again, I'd have to look it up again, saw it over a month ago
[12:50] <JakeSays> ah cool. i'll do some googlin'
[12:50] <Datalink> pksato, sometimes folks have done the thing I need done (that is a clean 5V rail source) and could be a good source of info, otherwise I plan on 2 hours for researching this bit
[12:50] <pksato> that mean "clean"?
[12:51] <ShorTie> these work good for old laptop screens, have to screen # to see if it works with apple stuff http://kenode.com/hdmi-vga-2av-lcd-reversing-controller-board.html
[12:51] <Datalink> pksato, I really don't want to add a USB cord to this, even internally if I don't have to, so I am planning on bypassing the USB plug and filters for the power input and using the GPIO
[12:52] <pksato> most moderm smps chip use a few parts.
[12:52] <u-ou> is it fine to use shutdown if X is (still) running
[12:52] <pksato> just do it.
[12:52] <JakeSays> ShorTie: heh. good find. i also have a macbook screen i'd like to use
[12:53] <ShorTie> sure u-ou
[12:53] <Datalink> u-ou, yeah, shutdown command terminates X11 and other processes
[12:53] <u-ou> ty
[12:54] <pksato> but, electronic devices always have a lots of wires. :)
[12:54] * jjido (~jjido@dab-yat1-h-62-9.dab.02.net) Quit (Ping timeout: 264 seconds)
[12:55] * Datalink headdesks
[12:55] <Datalink> potential... business... partner...
[12:55] <Datalink> I can't cobble together this stuff, as he's potentially going to bankroll my mad science
[12:56] <Datalink> which means, yes, I want to do certain things the hard way
[12:56] <ShorTie> cool, my little program works great so far at 06:40 and 16:40 .. :)~
[12:56] * cranvil (~cranvil@2a02:8108:9640:13dc:8182:8d27:d7ec:d08) has joined #raspberrypi
[12:56] <pksato> but, CM can save lots of wires.
[12:57] <ShorTie> i'd just use that buck convertor and cut the end off of a micro-usb cable
[12:57] <ShorTie> or mount a usb connector to it
[12:57] * ShorTie has done both
[12:57] <JakeSays> bankrolling is good
[12:58] <Datalink> yeah, I really don't want to have even the most professional looking of bodges in a circuit that's basically acting as my resume
[12:58] * mgottschlag (~quassel@reactos/tester/phoenix64) Quit (Ping timeout: 244 seconds)
[12:58] * Encrypt (~Chuck-nor@AMontsouris-553-1-66-52.w92-151.abo.wanadoo.fr) Quit (Quit: Quitte)
[12:59] <ShorTie> you can't buy the componests for what you can get that board for, if your try to save $$'s
[12:59] <Datalink> again, no ebay for this
[12:59] <JakeSays> i dont think saving money is his primary goal at this point
[13:00] <Datalink> bingo
[13:00] <JakeSays> sometimes there are more important things
[13:00] <Datalink> this is my resume, quality of design, clear bill of materials, that's what I'm showing here
[13:00] <ShorTie> never known a manufacture to not want to save $$'s, expectially when developing, lol.
[13:01] * kiely is now known as kiely_elsewhere
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[13:02] <Datalink> this is meant to be a show of tallent, slapping a prefab subassembly is counterproductive
[13:02] * ShorTie haits to try to re-invent the wheel, when the wheel is so cheap to buy
[13:02] <pksato> only need 12 to 5V?
[13:02] <Datalink> yeah, it'd be bad for the Pi's regulators to provide the 3.3 or 1.8
[13:02] <pksato> no need battery charger?
[13:03] <Datalink> desk application
[13:03] <Datalink> so nope
[13:03] <Datalink> I just need a clean 5V supply
[13:03] <Peetz0r> so, I have graphs for raspicam exposure time now :)
[13:03] <theorist-sleep> niston, how would I check if the ethernet is gone too
[13:04] <pksato> board with LM2596S. no need to buy on ebay, can buy direct from manufacturer.
[13:04] * utack (~utack@ip9234cb8c.dynamic.kabel-deutschland.de) has joined #raspberrypi
[13:04] <Peetz0r> I am using imagemagick to add timestamp data to raspistill (timelapse0 image output, but it's using a lot of cpu. It takes 1.2 seconds to edit a 1600*900 image file.
[13:04] <Peetz0r> nimoot: I have been told that you might know
[13:05] <Peetz0r> niston*
[13:05] <Peetz0r> (tabfail)
[13:05] <pksato> wires, build it as professionally.
[13:05] <Peetz0r> the issue, I think, is that decoding and encoding the jpeg in cpu is taking most of the time
[13:06] <JakeSays> you know, there is more to life than just "getting it done" - doing things the 'hard' way can be both rewarding and highly educational.
[13:07] <theorist-sleep> it can also lead to burnt pi
[13:07] * theorist-sleep is now known as theorist
[13:07] * theorist is now known as encapsulation
[13:07] <JakeSays> which are throwaway cheap
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[13:10] <pksato> Peetz0r: what command line you are using ?
[13:11] <Peetz0r> pksato: https://p.6core.net/p/20gAf78YXvlVFby6EMB9UFAT
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[13:17] <ShorTie> sure 'mv /tmp/webcam_2.jpg /tmp/webcam.jpg' isn't your time hog
[13:17] <ShorTie> might want to add a 'date' before/after to see how much time that takes to do
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[13:19] <Gadgetoid_> *pop*
[13:19] <pksato> use time command to check convert time.
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[13:20] <Peetz0r> ShorTie: I already know that almost all of the time is in 'convert'
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[13:21] <Peetz0r> 'mv' is 'move', which just does a tiny mutation in a filesystem table, not actually re-write te file
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[13:21] <Peetz0r> also, tmpfs, so even faster
[13:22] <ShorTie> ok, just an idea, sorry
[13:27] <ShorTie> 'The date and time should be in there if the pictures were taken with a recent RaspiStill..' http://www.raspberrypi.org/forums/viewtopic.php?t=57118
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[13:32] <ShorTie> hmmm, -x, --exif : EXIF tag to apply to captures (format as 'key=value') or none
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[13:41] <ShorTie> you need to add missing exif-date: https://irfanview-forum.de/showthread.php?t=1611
[13:41] <Peetz0r> that is not my issue
[13:42] <Peetz0r> the exif data is complete
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[13:42] <ShorTie> oh, ok, thought you just wanted to add the time/date into the picture
[13:42] <Peetz0r> but I want to add a timestamp to the image, not just the metadata
[13:42] <ShorTie> like a water mark
[13:42] <Peetz0r> yes
[13:42] <Peetz0r> and that also works
[13:42] <Peetz0r> the issue is, that that uses too much cpu
[13:42] <ShorTie> from my googling it canbe done from the get go
[13:42] <Peetz0r> because in order to edit an image, I need to decode and encode the whole jpeg file
[13:43] <Peetz0r> and doing that in cpu takes too much time
[13:43] <ShorTie> don't need to edit the image
[13:43] <shiftplusone> https://www.indiegogo.com/projects/raspivision-7-inch-ips-hd-raspberry-pi-display
[13:43] <ShorTie> it's added is the image is created
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[13:43] <Peetz0r> what exactly do you mean?
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[13:44] <shiftplusone> ShorTie, he wants an overlay image on top of the image with the date on it.
[13:44] <ShorTie> from what i can gather you just add it into the raspistill command with a -x
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[13:45] <Peetz0r> what I want is this: http://stream.haas-en-berg.nl/
[13:45] <shiftplusone> ah, haven't tried it myself
[13:45] <Peetz0r> as you can see, it is actualy working
[13:45] <Peetz0r> but it uses way too much cpu, and I;d like to reduce that
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[13:47] <pksato> Peetz0r: images are send to some external powerfull server?
[13:47] <Peetz0r> nope
[13:47] <Peetz0r> I need everything to happen on the Pi itself
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[13:48] <shiftplusone> Peetz0r, how's your C?
[13:49] <Peetz0r> not so good :p
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[13:49] <Peetz0r> I was hoping that a gpu-accelerated version of some tool would already exist :p
[13:49] <shiftplusone> How's your ability to learn?
[13:49] <Peetz0r> limited by lack of time :p
[13:49] * eXtremo (~eXtremo@unaffiliated/extremo) Quit (Ping timeout: 256 seconds)
[13:49] <Peetz0r> maybe somewhere this year
[13:49] <Peetz0r> definately not today
[13:50] <shiftplusone> ShorTie, I just checked the source and it seems like -x only applies to the exif data, not the actual image itself.
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[13:50] <Peetz0r> -x is for adding exif data (like gps stuff etc), but my exif data is already complete
[13:51] <Peetz0r> as has been mentoined at least three times now
[13:51] <Peetz0r> mentioned*
[13:51] <shiftplusone> I know
[13:51] <ShorTie> ok, me done googling on that
[13:51] <pksato> image processing takes long time.
[13:52] <Peetz0r> pksato: yeah, so I have noticed
[13:52] <shiftplusone> not if you're using the GPU. dispmanx can do compositing.
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[13:52] <ShorTie> but jamesh said it was there 'The date and time should be in there if the pictures were taken with a recent RaspiStill..'
[13:53] <Peetz0r> then again, he is talking about exif data, not a watermark-like text visible in the image itself
[13:53] * kiely_elsewhere is now known as kiely
[13:53] <shiftplusone> ShorTie, be where?
[13:53] <Peetz0r> and I have read that topic at least twice yesterday
[13:53] * ShorTie thinkz, stupid engineers i guess
[13:53] <shiftplusone> hey! >=(
[13:53] <ShorTie> http://www.raspberrypi.org/forums/viewtopic.php?t=57118
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[13:54] <shiftplusone> ShorTie, context.... that's a reply to " I've another question: and if my picture has no exif informations?"
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[13:55] <shiftplusone> Peetz0r, what about overlaying the exif data on the image on the page itself? Rather than compositing it into the image.
[13:56] <ShorTie> you can't add a water mark to the picture, but just let the water mark be the time/date
[13:56] * Datalink (~Datalink@unaffiliated/datalink) Quit (Ping timeout: 244 seconds)
[13:56] <ShorTie> dah
[13:57] <shiftplusone> that's not much of a watermark
[13:58] <pksato> overclock?
[13:58] <Peetz0r> shiftplusone: because I also use the images for other purposes
[13:58] <shiftplusone> and yes, you can use the GPU to put things on the image before feeding it to the encoder. Instead of going directly from the camera to the encoder, take the camera output, make it a dispmanx resource, composite to an off-screen display and feed that off-screen display to the encoder. It's not easy though.
[13:58] <Peetz0r> such as timelapse videos
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[15:14] <Gadgetoid_> Woo, Flotilla 200% funded :D
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[15:19] <shiftplusone> nice
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[15:40] <d3lphi> hi all. I did "rpi-update" on both my RPi's. After I rebooted I got a "black" blank screen, I don't see my desktop any more. What the hell happened here? And how can I revert to the rpi-firmware I used before?
[15:41] <Tachyon`> you can rewrite the sd card with the firmware image
[15:41] <ShorTie> did you read the topic ??
[15:41] <Tachyon`> but you will lose all user data if you do that
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[15:43] <Tachyon`> oh good lord
[15:43] <Tachyon`> that's not a small change
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[15:44] <ShorTie> nop, rpi-update is like broke right now
[15:44] <shiftplusone> shouldn't make the screen go black
[15:44] <shiftplusone> and you don't need to re-flash the card. you can use rpi-update on your PC and specify ROOT_PATH and BOOT_PATH
[15:45] * mgorbach (~mgorbach@pool-108-20-78-135.bstnma.fios.verizon.net) Quit (Quit: ZNC - http://znc.in)
[15:45] <d3lphi> so rpi-update has a bug?
[15:45] <shiftplusone> no
[15:45] <d3lphi> the problem is somehow related to X ?
[15:45] <shiftplusone> Not enough information provided to determine that
[15:45] <Gadgetoid_> rpi-update is broke? eeerkkk
[15:45] <ShorTie> the ?? is, is there a specific reason rpi-update was used
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[15:46] <shiftplusone> agh...... rpi-update is not broken!
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[15:46] <d3lphi> I can press ALT-T and open a terminal, but every 3 seconds I get a black screen for about 500ms and then I see the terminal window again. It's nasty to work like that, so I pressed "ALT-F2" to get a shell prompt (another tty). But what did happen?
[15:46] * mgorbach (~mgorbach@pool-108-20-78-135.bstnma.fios.verizon.net) has joined #raspberrypi
[15:46] <d3lphi> ShorTie: I just used "rpi-update" to have my rpi up-to-date, isn't that the purpose of rpi-update ?
[15:47] <shiftplusone> okay, better. So console works fine, but X goes blank for half a second randomly?
[15:47] <d3lphi> shiftplusone: not randomly, periodically
[15:48] <shiftplusone> so every few seconds? minutes?
[15:48] <d3lphi> I have two RPi's, both running same content, quite everything is the same. Both are having the same problem
[15:48] <Gadgetoid_> I'm surprised that "rpi-update is not the recommended update method for normal users" is news to me- I recommend rpi-update as a "first step" for installing product support libraries, old firmware is one of the leading causes of "why is xyz not working"
[15:48] <canton7> http://www.raspberrypi.org/documentation/raspbian/updating.md: "if you want to try more recent experimental software, it's also easy to update to the latest available version using the rpi-update tool." - experimental stuff breaks, sometimes
[15:48] <d3lphi> shiftplusone: as soon as Rpi starts and it comes to the point where the desktop normally should appear, I get the blank screen and nothing more
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[15:49] <shiftplusone> d3lphi, thanks, I'll see if the people who worked on the kernel recently know anything about that.
[15:49] <d3lphi> by the way: I remember that there is a way to downgrade and so revert that. It was something like "rpi-update x81jkd81jd9" where after the rpi-update command I had to attach some special id for the older firmware
[15:50] <shiftplusone> Gadgetoid_, the recommended way to keep things up to date is just the raspberrypi-bootloader package.
[15:50] <Gadgetoid_> shiftplusone, hmmm, interesting
[15:51] <shiftplusone> d3lphi, yes, that string after rpi-update is the commit shasum from hexxeh's firmware repo on github.
[15:51] <shiftplusone> brb
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[15:52] <d3lphi> shiftplusone: is there a way to find out which version I used before and to revert to it?
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[15:52] <Gadgetoid_> Guess I'm going to "sudo aptget --reinstall install raspberrypi-bootloader" then :D
[15:52] <ShorTie> ok, so rpi-update isn't broke, it still does exactly what it is suppose to do, but when it injects problems beyound my metal capacity, i consider it broke, lol.
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[15:53] <Gadgetoid_> ShorTie, I'd say it's broken by design, since it doesn't offer sufficient warnings before replacing your kernel with a potentially unstable one
[15:53] <d3lphi> how should I revert to the version used before the rpi-update command?
[15:53] <shiftplusone> agh, I give up. good luck.
[15:53] <Gadgetoid_> Should probably track against the kernel that's distributed in raspberrypi-bootloader unless it gets an --experimental flag
[15:53] <Gadgetoid_> or --unstable
[15:54] <shiftplusone> Gadgetoid_, you should probably stick to bleeding edge for dev work.
[15:54] <Gadgetoid_> shiftplusone, true, that, but often we release products which have troubles on certain versions of the firmware- the solution we've previously recommended is "sudo rpi-update"
[15:54] <shiftplusone> d3lphi, willing to help with figuring out what the issue is, or do you just want to return back to the old firmware?
[15:54] <Gadgetoid_> I might have to *not* recommend that, for sanities sake!
[15:55] <shiftplusone> Gadgetoid_, yes, that seems sensible. rpi-update was an ugly hack which has becomes more widely used than it should be.
[15:55] <shiftplusone> *become
[15:55] <d3lphi> shiftplusone: I'd like to help,too but ==> I urgently need the Rpi run again :( unfortunately
[15:55] <shiftplusone> d3lphi, k, sex.
[15:56] <shiftplusone> sex? sec!
[15:56] <d3lphi> haha
[15:56] <d3lphi> :)
[15:56] <shiftplusone> what idiot put c and x next to each other >=/
[15:56] <d3lphi> rotfl
[15:56] <Gadgetoid_> It sure as hell wasn't Dvorak!
[15:56] <d3lphi> I did find https://github.com/Hexxeh/rpi-firmware/commits/master but I'd need to know what version was used before to be sure I pick the right one
[15:56] <shiftplusone> d3lphi, do rpi-update f74b92120e0d469fc5c2dc85b2b5718d877e1cbb
[15:57] <shiftplusone> won't get you the version you used before, but it's the version before the latest major changes.
[15:57] * ctarx (~ctarx@p54A8458F.dip0.t-ipconnect.de) has joined #raspberrypi
[15:58] <shiftplusone> or, reinstall raspberrypi-bootloader
[15:58] <shiftplusone> (apt-get install --reinstall raspberrypi-bootloader)
[15:58] <Gadgetoid_> I'm also trying that shiftplusone :D since I updated my firmware about 2 hours ago but then went off to lunch
[15:58] <Gadgetoid_> I'd rather track against the latest possible release on my dev Pis
[15:59] <d3lphi> shiftplusone: I am installing the version f74b9212.... atm
[15:59] <shiftplusone> Gadgetoid_, the next release will be using the 3.18 kernel so... it's not too far off. But people are going to run around like headless chickens because they don't understand device tree.
[15:59] <Gadgetoid_> Haha, I don't understand device tree :(
[15:59] <shiftplusone> me neither, but Phil has done a good job documenting the relevant parts.
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[16:03] <ShorTie> room for like '-- easiest fix 'apt-get install --reinstall raspberrypi-bootloader' to topic maybe ??
[16:03] <d3lphi> shiftplusone: didn't work, still same issue... should I try another firmware? any clues?
[16:04] <shiftplusone> d3lphi, try this apt-get install --reinstall raspberrypi-bootloader
[16:04] <shiftplusone> excellent... so at least we know the issue is NOT caused by the 3.18 kernel.
[16:04] * Mrloafbot_ (~Mrloafbot@63-148-120-34.dia.static.qwest.net) has joined #raspberrypi
[16:05] <d3lphi> should I try 3b0cf80cf3108d98880e49d736244a375f85b47b for next?
[16:06] <shiftplusone> no, forget rpi-update, go to the latest stable firmware using the apt-get command
[16:06] <shiftplusone> (and don't forget to reboot)
[16:07] <shiftplusone> honestly, it doesn't sound like a firmware issue at all and I think rpi-update thing is just correlation, not causation.
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[16:13] <d3lphi> shiftplusone: "apt-get update && apt-get upgrade && apt-get dist-upgrade" was already executed. There's nothing to fetch
[16:14] <shiftplusone> d3lphi, that's not what I said to run
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[16:14] <d3lphi> how do I get the latest stable firmware? what is the apt-get command therefore?
[16:14] <shiftplusone> apt-get install --reinstall raspberrypi-bootloader
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[16:15] <d3lphi> ok, I will try as next step to do that. Actually I am trying "rpi-update a71a98c35c37c7e8147c8c6d3bdc2622843185dd" from 10th Sep. 2014 because on 15th September I installed the image on MMC card
[16:15] <d3lphi> it's already running and I have to wait
[16:16] <d3lphi> if this won't work, too I'll try with the command you gave me
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[16:23] <d3lphi> shiftplusone: apt-get install --reinstall raspberrypi-bootloader didn't help either :( damn
[16:24] <shiftplusone> That's good... means the firmware and kernel is fine and the problem is on your end.
[16:24] <shiftplusone> Well, not so good for you, I guess.
[16:24] <shiftplusone> Anything interesting in Xorg.log?
[16:24] <d3lphi> shiftplusone: ok, I will restore from a backup
[16:24] <shiftplusone> or dmesg or syslog
[16:25] <shiftplusone> ok
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[16:27] <d3lphi> no time to look at it, had to revert to the image restore
[16:27] <d3lphi> thanks however
[16:28] * shiftplusone shrugs
[16:28] <shiftplusone> In the long run, it's usually quicker to figure out why things break in the first place rather than re-image every time.
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[17:30] <didzan> what firewall could you recommend me for my rpi?
[17:30] * veonik is now known as veonik_
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[17:32] <thor77> didzan: iptables
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[17:36] <pksato> "firewall" is on linux kernel. To use, need a tools to set it. iptables is one of these tools.
[17:38] <didzan> pksato, thor77: thank you guys, what about ufw? or fwbuilder???
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[17:42] <pksato> you can use ufw
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[17:44] <pksato> iptables -P INPUT DROP; iptables -I INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
[17:44] <pksato> and have basic firewall for local host, not routing.
[17:48] <didzan> thanks
[17:48] <pksato> it is not permanent
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[18:08] <sir_phobos> Hey everyone. I'm new to Raspberry Pi and I was wondering if it is possible to use one as a high quality audio recording unit. For example, I am wanting to record line level audio of bat echolocation calls (probably 16 kHz - 70 kHz). Is this possible with the Raspberry Pi and does anyone have related experience or links to articles/solutions?
[18:11] * amigojapan (~amigojapa@c119045.net21845.cablenet.ne.jp) Quit (Quit: amigojapan)
[18:12] <thor77> sir_phobos: if you find a gpio-module for that, sure
[18:12] <thor77> maybe someone did that before
[18:13] <sir_phobos> gpio?
[18:14] <thor77> gpio-pins
[18:14] <thor77> sir_phobos: http://www.raspberrypi.org/forums/viewtopic.php?t=18891
[18:15] <sir_phobos> haha, what do you know. thanks
[18:16] <sir_phobos> actually that's more than I need
[18:16] <sir_phobos> I basically just need a high quality (24 bit 192 kHz) audio recording solution
[18:16] <thor77> but maybe this can help you
[18:16] <sir_phobos> I don't need to do frequency division on the signal. yes, I will keep reading
[18:17] <thor77> to find the right keywords
[18:17] <pksato> sir_phobos: good quality usb sound card (very expensive)
[18:17] * Mikelevel (~MoVeWoRk@unaffiliated/mikelevel) has joined #raspberrypi
[18:18] <sir_phobos> yeah, I was hoping to avoid that :/
[18:18] * Mikelevel (~MoVeWoRk@unaffiliated/mikelevel) Quit (Client Quit)
[18:19] <pumphaus> sir_phobos: you might want to look at the wolfson (now cirrus logic) raspberry pi sound card
[18:19] * Noldorin (~noldorin@unaffiliated/noldorin) has joined #raspberrypi
[18:19] <pumphaus> it can do 24 bit audio recording @ 192 kHz
[18:19] <pksato> or http://www.adafruit.com/product/1761
[18:19] <sir_phobos> ok, I will check it out
[18:20] * didzan (32c451e6@gateway/web/freenode/ip.50.196.81.230) Quit (Quit: Page closed)
[18:20] <pumphaus> but sensitivity in the frequency range above 20 kHz is going down, fast
[18:20] <pksato> but, I not know if record at 192kHz.
[18:20] <sir_phobos> hm
[18:20] <pumphaus> it's not that expensive, so you might give it a try
[18:21] <sir_phobos> did you find a frequency response graph somewhere or read that?
[18:21] <pumphaus> looking
[18:22] <pumphaus> I remember reading a thread in the element14 forums from someone who wanted to do the same as you
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[18:24] <pumphaus> sir_phobos: http://www.element14.com/community/thread/32339/l/recording-up-to-192khz
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[18:24] <sir_phobos> I see
[18:24] * lawdy (~lawdy@host109-156-213-74.range109-156.btcentralplus.com) Quit (Ping timeout: 245 seconds)
[18:24] <sir_phobos> I'll have to look at the range of bat calls in the area and see if that drop-off will have a big affect
[18:25] <pumphaus> so up to 94 kHz seems to be fine
[18:25] <pksato> mod on input filters
[18:26] * ukgamer|away is now known as ukgamer
[18:26] <pumphaus> sir_phobos: anyway, that thread already has a lot of info from people trying to record bats. :)
[18:26] <sir_phobos> right, thanks a lot. good info
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[18:44] <CorePorkRation> any idea why a uvcvideo webcam would work in mint, but not in raspbian? Lsusb on pi shows no text for the description column, but in mint it does, also i get a 239 iscellaneous device with lsusb -v on the item with my vendor id
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[19:03] <sir_phobos> do GPIO devices designed for use with rev 2 work on rev 3?
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[19:05] <shiftplusone> are you asking whether model b devices work on the b+?
[19:05] <sir_phobos> yes
[19:05] <shiftplusone> sometimes
[19:05] <shiftplusone> usually
[19:06] <sir_phobos> wondering about the wolfson audio card https://www.adafruit.com/product/1761
[19:06] <shiftplusone> depends on how well the hardware fits on top. Some boards have trouble connecting physically, but all the pins are okay.
[19:06] <sir_phobos> right
[19:06] <shiftplusone> ah, no idea.
[19:07] <sir_phobos> looks like there is very little on the side of that card which connects to the pi but not sure about usb port heights and things on the pi
[19:07] <sir_phobos> it also has a support screw
[19:07] <pksato> It doesn't. The Wolfson uses the P5 connector which is missing from the B+
[19:08] <pksato> from forum
[19:08] <sir_phobos> hm, ok
[19:08] <shiftplusone> I don't think wolfson's software support has been very good either
[19:09] <pksato> for b+ http://www.mcmelectronics.com/product/83-16518
[19:10] <sir_phobos> ah, updated one. cool
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[19:13] <sir_phobos> "At this time support is not provided within the current Raspberry Pi image for the Cirrus Logic board. We reccomend that you download this Raspberry Pi Image from Element14 that contains support for the Cirrus Logic audio card."
[19:13] * qubitnerd is now known as eru
[19:13] <sir_phobos> does that sound like it may be an issue? the link is a 2.1 GB zip file
[19:13] <sir_phobos> maybe just an older image?
[19:14] * samB__ (~samB__@cpc22-thor5-2-0-cust140.14-2.cable.virginm.net) Quit (Quit: samB__)
[19:16] <pksato> humm... no date to "At this time".
[19:16] <sir_phobos> could be when it was posted on that page, not sure
[19:17] <sir_phobos> post from 3 weeks ago sounds like you can get it to work
[19:20] * krnlyng (~liar@83.175.90.24) Quit (Ping timeout: 240 seconds)
[19:22] * hadifarnoud (~hadifarno@5.52.122.44) Quit ()
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[19:43] * Tachyon` looks at NullMoogleCable
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[20:02] <mikroskeem> hey what makes raspberry icon on rpi boot screen? the firmware or kernel itself?
[20:02] * skyroveRR (~skyroveRR@unaffiliated/skyroverr) Quit (Read error: Connection reset by peer)
[20:03] * SpeakerToMeat (~SpeakerTo@prgmr/customer/SpeakerToMeat) Quit (Ping timeout: 252 seconds)
[20:04] * Almazys (~Almazys@89.3.97.129) Quit (Ping timeout: 240 seconds)
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[20:17] * kiely is now known as kiely_elsewhere
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[20:26] * divx118 (~divx118@5ED66EB7.cm-7-7b.dynamic.ziggo.nl) Quit (Quit: ZNC - http://znc.in)
[20:27] * DoctorBud (~DoctorBud@63-155-134-197.eugn.qwest.net) has joined #raspberrypi
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[20:31] * divx118 (~divx118@5ED66EB7.cm-7-7b.dynamic.ziggo.nl) has joined #raspberrypi
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[20:34] * Encrypt (~Chuck-nor@AMontsouris-553-1-66-52.w92-151.abo.wanadoo.fr) Quit (Quit: Quitte)
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[20:44] * Diaoul (~Diaoul@static-5-51-3-145.ftth.abo.bbox.fr) Quit (Ping timeout: 265 seconds)
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[20:47] * terrasapien (~sapien@d207-6-182-109.bchsia.telus.net) Quit (Quit: Leaving)
[20:50] <shiftplusone> mikroskeem, kernel
[20:51] <shiftplusone> the only thing the firmware puts on the screen is that rainbow square
[20:53] <mikroskeem> shiftplusone: where can i change that?
[20:53] <mikroskeem> or disable at all?
[20:55] <shiftplusone> google linux kernel logo
[21:00] <mikroskeem> thanks
[21:01] * lucasub (~luca@host30-178-dynamic.4-87-r.retail.telecomitalia.it) has left #raspberrypi
[21:02] * kirin` (telex@gateway/shell/anapnea.net/x-tjxlpexrtxkovyfv) Quit (Ping timeout: 252 seconds)
[21:03] * neionz (~lolwhat@gateway/tor-sasl/lolwhat) Quit (Quit: neionz)
[21:04] * kirin` (telex@gateway/shell/anapnea.net/x-qsxymzjmohzsieme) has joined #raspberrypi
[21:04] <niston> hmm
[21:04] <niston> the signals on P5 connector are available on the GPIO with B+, no ?
[21:06] * djhworld (~djhworld@176.252.101.227) Quit (Quit: My Mac has gone to sleep. ZZZzzz…)
[21:06] <niston> sir_phobos: just use a PiDAC+ instead of the wolfson crap
[21:07] * Armand (~armand@2a01:9cc0:40:6:3820:eeb:b6bd:8386) has joined #raspberrypi
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[21:07] <mikroskeem> can anyone help me with building toolchain (f*k the crosstool-ng crap) ?
[21:09] <ApolloJustice> why do you want to filesystem check crosstool-ng?
[21:09] <ShorTie> mikroskeem http://tiny.cc/h7za1w
[21:11] <ApolloJustice> so i can tell /dev/mmcblk0p1 to get fscked?
[21:11] <ApolloJustice> because its telling me to fsck it
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[22:05] * nils2 is now known as nils_2
[22:05] <shiftplusone> http://vimeo.com/117274487
[22:06] * dreamon (~dreamon@unaffiliated/dreamon) Quit (Ping timeout: 255 seconds)
[22:08] * GentileBen (~RaycisCha@86.3.250.170) Quit (Ping timeout: 240 seconds)
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[22:16] * utack (~utack@ip9234cb8c.dynamic.kabel-deutschland.de) Quit (Remote host closed the connection)
[22:16] * sir_phobos (~sir_phobo@gateway/tor-sasl/sirphobos/x-80352877) has joined #raspberrypi
[22:16] * teepee (~teepee@gateway/tor-sasl/teepee) Quit (Ping timeout: 250 seconds)
[22:16] <niston> heh
[22:17] * thomasreggi (~thomasreg@cpe-67-244-101-108.nyc.res.rr.com) has joined #raspberrypi
[22:18] <sir_phobos> niston I don't think the PiDAC+ has audio input
[22:18] <niston> nope
[22:19] <sir_phobos> need that :P
[22:19] <niston> ah
[22:19] * thomasreggi (~thomasreg@cpe-67-244-101-108.nyc.res.rr.com) Quit (Client Quit)
[22:19] <niston> I'm trying to convince them to produce a Line-In board
[22:19] <niston> but they're busy with the PiAmp, they said :P
[22:19] <sir_phobos> IQaudIO?
[22:19] <niston> yup
[22:19] * t0x0sh (~tosh@5.135.187.40) Quit (Ping timeout: 240 seconds)
[22:20] <niston> I'm using their PiDAC for my little radio project
[22:20] <niston> https://niston.wordpress.com/2014/10/10/niston-stream-one/
[22:20] <sir_phobos> cool
[22:21] * teepee (~teepee@gateway/tor-sasl/teepee) has joined #raspberrypi
[22:22] <sir_phobos> looks nice
[22:22] <niston> yup :)
[22:22] <niston> planning to add a CD player and two class D monoblocks
[22:23] * [ctarx] (~ctarx@p4FE6D83C.dip0.t-ipconnect.de) has joined #raspberrypi
[22:23] <niston> and updating the software with a preamp and control for the CD player
[22:23] <sir_phobos> what's the total cost so far
[22:24] <niston> close to CHF 500
[22:24] <niston> equals 568 USD
[22:25] <niston> not bad, considering the marantz stream player of my sister's BF cost almost 2k
[22:25] <sir_phobos> right haha
[22:25] <niston> and its really crap
[22:25] <niston> streaming stops all the time
[22:25] <niston> for no apparent reason
[22:25] <niston> and then you have to go click play again
[22:25] <sir_phobos> hm
[22:25] <niston> mine doesn't do that :P
[22:26] <ppq> das ist ja ma rantzig
[22:26] <ppq> scnr
[22:26] * ctarx (~ctarx@p54A8458F.dip0.t-ipconnect.de) Quit (Ping timeout: 256 seconds)
[22:26] <niston> yup :P
[22:27] <niston> oh well but
[22:27] * sir_phobos (~sir_phobo@gateway/tor-sasl/sirphobos/x-80352877) Quit (Remote host closed the connection)
[22:27] <niston> if you calculate the about 250 hours I spent on the software so far
[22:27] <niston> ...
[22:28] <niston> luckily for you I made it open source :P
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[22:29] <Gadgetoid> Hurrah, >750 backers :D
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[22:47] <shiftplusone> Gadgetoid, is your F5 key worn out yet?
[22:48] <niston> lol
[22:51] * Almazys (~Almazys@ip-129.net-89-3-97.rev.numericable.fr) has joined #raspberrypi
[22:52] <neionz> so I want to power my raspberry pi with a 9V battery. But I can't just connect the battery to the raspi in series with a resistor since the resistance of the raspi will vary?
[22:54] <clever> the current draw of the pi will vary a lot
[22:54] <clever> which will cause the voltage drop on the resistor to vary
[22:55] <clever> which will then just fry the pi
[22:55] <clever> you want a voltage regulator
[22:55] <clever> neionz: the cheapest option, get a 12v cellphone charger for a car, and wire the 9v battery to it
[22:55] * _Ulan (~Thunderbi@cpc5-benw11-2-0-cust687.16-2.cable.virginm.net) has joined #raspberrypi
[22:55] <clever> it will probly handle being 3 volts low, and its designed to put out 5v on a usb port
[22:56] <ozzzy> http://ozzzy.dyndns.org/images/mypi.jpg
[22:56] * theBestNunu (~theBestNu@unaffiliated/thebestnunu) has joined #raspberrypi
[22:57] <neionz> I could just make a voltage divider?
[22:57] * argakiig_lost is now known as argakiig
[22:57] <clever> neionz: nope, the voltage will vary depending on current
[22:57] <ozzzy> neionz, not unless you want to mess up your pi
[22:57] <clever> so it wont work
[22:57] <niston> use a uBEC :P
[22:58] * kiely_elsewhere is now known as kiely
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[22:58] <niston> http://www.hobbyking.com/hobbyking/store/__4319__TURNIGY_3A_UBEC_w_Noise_Reduction.html
[23:00] <clever> thats a more advanced option, but also works
[23:00] <niston> very easy to implement, too
[23:00] * BluRaf (~BluRaf@093105018083.lowicz.vectranet.pl) Quit (Quit: See ya!)
[23:00] <clever> i think connecting a 9v battery to a car charger is simpler, then you can just continue to use normal usb cables
[23:00] <neionz> if I have two resistors in series to a 9V battery such that 5V is over one of the resistor.. and I connect a rasperry pi in parallel to that resistor.. will those 5V stay stable over that resistor? (I suppose not, the voltage will drop --or increase-- since the resistance will be lower for that parallel coupling?)
[23:00] <clever> no need to solder anything to the pi
[23:01] <clever> neionz: the massive current the pi is drawing relative to the resistors, will cause the voltage drop to increase massively
[23:01] <niston> also you 'll be burning lot of energy
[23:01] <clever> causing it to just not work
[23:01] <niston> literally converting it to useless, perhaps even unwanted, heat
[23:01] <clever> you would need to setup the voltage divider to suck several amps, for the pi to have minimal effect
[23:02] <clever> so your going to waste even more energy
[23:02] <niston> and if you're stuck on voltage dividers, use at least a linear regulator :P
[23:02] <niston> which is essentially an automatically adjusting voltage divider :P
[23:02] <clever> all a linear regulator does is dynamicaly adjust the resistance to keep the voltage stable
[23:03] <clever> it will still burn the extra voltage off as heat
[23:03] <niston> yup
[23:03] <niston> the more current drawn, the more heat produced
[23:03] <neionz> what a waste :P. Will voltage regulators do that?
[23:03] <niston> and with the blink of an eye, you're gonna need a heatsink that weighs 2 pounds :P
[23:03] <clever> but a car cellphone charger is usualy a switching mode supply, which can take ~12v in and put 5v out, with a handy usb port already mounted
[23:05] * [ctarx] (~ctarx@p4FE6D83C.dip0.t-ipconnect.de) Quit (Quit: Textual IRC Client: www.textualapp.com)
[23:05] <niston> yea, if you go with a 2Amps one, it might work out cheap and easy - especially if you already have such charger sitting around, somewhere
[23:06] * dreamon (~dreamon@unaffiliated/dreamon) has joined #raspberrypi
[23:06] <clever> exactly
[23:07] <niston> if you just have a weak one (500mA), cut the USB cable off and solder it to the uBEC :P
[23:07] * ZacharyIgielman (~ZacharyIg@31.185.156.19) Quit (Ping timeout: 240 seconds)
[23:08] <ozzzy> I buy lots of little switch-mode power supplies on ebay
[23:09] * Mrloafbot_ (~Mrloafbot@63-148-120-34.dia.static.qwest.net) Quit (Quit: Leaving)
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[23:22] <neionz> can't you power a rpi with a 12V battery with lossless conversion of 12V to 5V?
[23:22] <Gadgetoid> shiftplusone: F5 still going strong :D Alex/RaspiTV made a kickstarter tracker script for high granularity :D
[23:22] <Gadgetoid> neionz: you can't loslessly convert 12V to 5V ever
[23:23] <shiftplusone> heh, fair enough
[23:24] <neionz> Gadgetoid: isn't that what capacitors do in a sense? They resist without converting the energy to heat?
[23:24] <neionz> (I'm just talking about the resistance part to begin with)
[23:24] * _Ulan (~Thunderbi@cpc5-benw11-2-0-cust687.16-2.cable.virginm.net) Quit (Ping timeout: 272 seconds)
[23:24] * Armand (~armand@2a01:9cc0:40:6:3820:eeb:b6bd:8386) has joined #raspberrypi
[23:24] * Syliss (~temp@c-24-23-6-50.hsd1.ca.comcast.net) has joined #raspberrypi
[23:24] <Armand> w00t! One USB battery-powered Pi! :D
[23:25] * pksato (~PEBKAC@unaffiliated/pksato) Quit (Remote host closed the connection)
[23:25] * sameer-isa (moaz786@unaffiliated/moaz) has joined #raspberrypi
[23:25] <sir_phobos> link?
[23:26] <Armand> I just plugged it in.. lol
[23:26] <sameer-isa> Is an ARM computer suitable for hosting a VPS?
[23:26] * pksato (~PEBKAC@unaffiliated/pksato) has joined #raspberrypi
[23:26] <sir_phobos> :P
[23:26] <sameer-isa> (the computer in question is not an RPi)
[23:26] <Gadgetoid> neionz: capacitors don't really resist at all, although the voltage across them is zero
[23:26] <Armand> Also, my phone doesn't let me post pics to my gallery. :(
[23:26] <Gadgetoid> There's no conversion happening, just a storage of charge
[23:26] <niston> neionz: switching mode power supplies will usually have efficiencies greater than 90%
[23:26] * shiftplusone questions Gadgetoid's understanding of caps >.>
[23:27] <neionz> so the best option I have to power my rpi with a battery ("losslessly") is to get a 5V battery (with high current capacity)?
[23:27] * nomadic (~nomadic@unaffiliated/nomadic) Quit (Ping timeout: 244 seconds)
[23:27] <Gadgetoid> shiftplusone: so would I, I skipped ALL the electrical fundamentals
[23:28] <shiftplusone> neionz, don't worry about losses. switched mode power supplies are pretty damn efficient nowadays.
[23:28] <niston> yeah
[23:28] <niston> also batteries have a discharge curve
[23:29] <niston> so if you hook it up directly it might either burn up instantly (battery voltage too high) or stop working after some minutes (battery voltage dropped below usable level)
[23:29] <Armand> neionz: http://www.amazon.co.uk/EC-Technology%C2%AE-18000mAh-Dual-Port-Tablets-Black/dp/B00LVTUYA0/ref=sr_1_6?ie=UTF8&qid=1421245386&sr=8-6&keywords=usb+battery+pack
[23:29] * nomadic (~nomadic@unaffiliated/nomadic) has joined #raspberrypi
[23:29] <Gadgetoid> I find 5V USB battery packs do a pretty good job- nice and safe
[23:29] <Armand> That's what I'm using now
[23:29] <niston> they should have stabilized 5V
[23:30] <niston> the battery in them has probably higher voltage
[23:30] <neionz> not really worrying though, but I like the theory. Think about it, you lose about 20 minutes if you convert your battery voltage with 90% efficiency and the rpi runs for 200 minutes.
[23:30] <neionz> Armand: now that's neat!
[23:31] <Armand> Tis. ^_^
[23:31] <neionz> Armand: how's it working out for you?
[23:31] <Armand> I'm hoping it will drive an ODroid C1 + LCD
[23:31] <Armand> It's been on about 5 minutes so far. lol
[23:31] * Almazys (~Almazys@ip-129.net-89-3-97.rev.numericable.fr) Quit (Quit: Good bye all ! :))
[23:31] <neionz> Armand: just got it?
[23:32] <shiftplusone> Gadgetoid, but yeah, caps do have a voltage across them (it's a fancy integral equation based on the current, time and capacitance). Things get a bit hairy when people try to apply P=IV to capacitors and inductors, which is where reactive power comes in.
[23:32] <Armand> neionz: Early this week, but I had to find my rPi. :/
[23:33] <Armand> I've just put a clean install on the SD card, as I forgot the passwords.
[23:33] <Encapsulation> http://www.ebay.com/itm/331413242862 is this board not capable of driving a 12v motor with 3.3v logic from rpi? if not what pre-made board will do this preferably for 2-4 motors
[23:34] <Gadgetoid> shiftplusone: Looked it up to try and distill a rational explanation - too many big words for a Friday!
[23:35] * Vutral (~ss@mirbsd/special/Vutral) Quit (Ping timeout: 244 seconds)
[23:35] <shiftplusone> Yeah, I wouldn't bother. It's not really stuff you have to worry about outside of power lines and generators and all that fun stuff.
[23:35] <neionz> Encapsulation: don't power it from the rpi or you'll smell smoke
[23:36] <Gadgetoid> shiftplusone: Caps are basically a "sprinkle a few of these on your power lines if you want your circuit to work reliably" magic jellybean
[23:36] <neionz> Encapsulation: just use the rpi to send a signal to an external circuit (with its own power source) that it should spin or whatever
[23:36] <shiftplusone> heh
[23:37] <niston> Gadgetoid: interesting point of view
[23:37] <Gadgetoid> niston: The wonderful world of digital electronics :D all the fun stuff happens inside ICs
[23:38] <shiftplusone> it's a shame though, you can do some fancy things with analogue electronics.
[23:39] <Gadgetoid> Oh I know that :D and I've definitely tinkered, but I suspect I'll have to approach it with rather more time on my hands at some point
[23:39] <niston> digital = smoke / no smoke
[23:39] <Encapsulation> neionz, I already smoked my pi but not from hooking it up properly
[23:39] <niston> analog = varying degrees of smoke, in varying colors :P
[23:40] <Gadgetoid> I've never smoked a Pi, but I did fry a current limiting IC recently, with an audible pop
[23:40] <Encapsulation> I burnt the wifi chip
[23:40] <Encapsulation> I mean ethernet/usb
[23:40] <Encapsulation> so I guess its worthless now
[23:40] <Encapsulation> even though it still loads an os from the sd
[23:41] * v0lt_ (~textual@unaffiliated/v0lt/x-7782577) has joined #raspberrypi
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[23:42] <neionz> Encapsulation: could be dangerous if it's broken. Don't leave it alone. If one component dies, the rest could go bananas in a chain reaction.
[23:42] <clever> Encapsulation: if you can unsolder the ethernet chip, you can downgrade it to a model a
[23:42] <clever> youll get 1 usb port back
[23:42] <Encapsulation> really? that;s all I would need
[23:42] <niston> Encapsulation: the ethernet is dead?
[23:42] <clever> Encapsulation: and add 2 small jumpers
[23:42] <Encapsulation> niston, I'm not sure how to find out because all of the usbs are dead
[23:43] <niston> connect ethernet, ping remote system?
[23:43] <Armand> I built my own USB power board to connect 5v.. got a capacitor on there and 1A polyfuses on 2 ports. ^_^
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[23:43] <clever> Encapsulation: double check the schematic first, but i believe you just short out R36 and R37, then remove the ethernet chip
[23:43] <clever> Encapsulation: and youll have a model a
[23:44] <Encapsulation> and one of the usbs will work again?
[23:44] <clever> yep
[23:44] <clever> the cpu has 1 usb port
[23:44] <niston> the USB from the SoC will
[23:44] <niston> yes
[23:44] <Encapsulation> hmm
[23:44] * nimoot (~HomoSapie@unaffiliated/toomin) Quit (Ping timeout: 245 seconds)
[23:44] <clever> for the model b, that 1 usb port goes to the usb hub+ethernet
[23:44] <Encapsulation> how difficult would this be
[23:44] <niston> unless of course
[23:44] <clever> and both ports go to the hub
[23:44] <niston> the fried chip produced a short
[23:44] <Encapsulation> I have a magnifying glass, a soldering iron, a bright light here
[23:44] <Encapsulation> helping hands
[23:44] <niston> and killed some internal stuff on the SoC
[23:45] <clever> Encapsulation: first, look on the bottom near the usb ports, do you see R36 and R37 ?
[23:45] <niston> hot air gun recommended :P
[23:45] <ali1234> Encapsulation: the adafruit motor shield v2 can run off 3.3v and drive 4 DC motors
[23:45] <ali1234> and it is controlled on i2c
[23:45] <ali1234> 3v3 logic and 5v-12v power
[23:45] <Encapsulation> is it easily controlled on i2c? I just tried to read from an adc over i2c and couldnt without asking the wiringpi library creator for help
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[23:46] <ali1234> Encapsulation: it's easy if you know how...
[23:46] <niston> ali1234: use a 12V power supply to power the shield
[23:46] <ali1234> niston: yes, indeed
[23:46] <ali1234> or a big battery
[23:46] <Encapsulation> I have a regulated supply coming
[23:47] <Encapsulation> 12v1a 5v1a dual output
[23:47] <Encapsulation> to power the pi and my 12v motors
[23:47] <Encapsulation> and a new pi coming to replace the burnt one
[23:47] * ponA (~Miranda@HSI-KBW-134-3-94-90.hsi14.kabel-badenwuerttemberg.de) has joined #raspberrypi
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[23:48] <ppq> pc power supplies are good for that. and cheap
[23:48] <niston> how did you toast it?
[23:48] <ali1234> PC power supplies aren't that good for large inductive loads
[23:48] <Encapsulation> with that stupid dual h brdige board
[23:48] <niston> oh
[23:48] <ali1234> i've blown more than one trying to drive DC motors off them
[23:48] <niston> yeah I remember :P
[23:49] <Encapsulation> I bought a 4 dollar chinese supply
[23:49] <ali1234> although they are probably beefier these days
[23:49] <Encapsulation> I'm hoping its amazing
[23:49] <ali1234> lol
[23:49] <Encapsulation> if not I have a flu3-40-1 I found that I can use, I'll just need a larger enclosure for the project
[23:50] * Demods (~Demods@94.54.107.138) Quit (Client Quit)
[23:50] <Encapsulation> http://www.ebay.com/itm/221510525447
[23:50] <Encapsulation> "Notice : this module was DIY circuit board,please be careful " my favorite part
[23:51] <niston> 1 amp is a bit weak to power a Pi IMHO
[23:52] <Encapsulation> if its not enough my flu3-40-1 has 3amps
[23:52] <Encapsulation> but I've been powering the pi with a 500ma supply
[23:52] <Encapsulation> switching relay boards no problem
[23:52] <Encapsulation> all fromt he pi
[23:52] <ali1234> the A+ uses like 100mA supposedly
[23:52] <clever> oddly, ive had no problem running 2 pi's off a single usb port on my desktop
[23:52] <Encapsulation> Ive run one pi from my laptops usb as well
[23:53] <clever> i ganged the gnd and 5v together on the gpio headers, so they could share a usb cord
[23:53] * c00ljs (~c00ljs@177.142.74.227) has joined #raspberrypi
[23:54] <niston> well that is certainly not recommended :P
[23:54] <clever> something i have been wanting, but would require redoing the board layout
[23:54] <clever> put the D- and D+ of the power port on 0.1" headers
[23:54] <ali1234> i can beat your $4 PSU anyway, mine cost $2 including shipping
[23:55] <clever> so you could add an ftdi to the board, and turn the whole system into a 1 usb cord serial linux system
[23:55] <sir_phobos> what is it ali1234
[23:56] <ali1234> http://www.amazon.co.uk/dp/B00HCZHFVS/ref=sr_ph?ie=UTF8&qid=1422053753&sr=1&keywords=buck+converter
[23:56] <ali1234> "highqualityforyou"
[23:56] <sameer-isa> <sameer-isa> Is an ARM computer suitable for hosting a VPS?
[23:57] <ali1234> maybe, but not a raspberry pi
[23:57] <Encapsulation> " 3/5 of them blew "
[23:57] <niston> ARM is just a processor architecture
[23:57] <ali1234> Encapsulation: what you want for <$2?
[23:57] <niston> so that question does not really compute.
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[23:58] <sir_phobos> I feel like the parts on the board would cost more than that alone
[23:58] * sameer-isa (moaz786@unaffiliated/moaz) has joined #raspberrypi
[23:58] <neionz> theoretically (not going to), if I divide 9V into 4 and 5V over R1 and R2, and tries to power a raspberry pi by parallel coupling it with R2, that the pi can't draw so much current that it'll burn? Rather, the voltage will just drop over rpi and R2 (since rpi and R2 in parallel gives less resistance) giving R1 an even higher voltage drop. And as said, R1 sets the upper limit of how much current that can be drawn too.
[23:58] <sameer-isa> ok
[23:58] <niston> http://www.raspberrypi.org/help/faqs/#powerBatteries
[23:58] * sameer-isa (moaz786@unaffiliated/moaz) has left #raspberrypi
[23:59] <niston> read that before connecting a battery to your Pi
[23:59] <ali1234> sir_phobos: it costs me 50% of the price of those things to post a letter to my next door neighbour... and those are coming from china
[23:59] * kiely is now known as kiely_elsewhere
[23:59] <Encapsulation> I can'tg find r36 and r37

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