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Is there an Arduino thread? I saw that animatronic lamp video and started looking around but the Pi thread is the closest I've found so far.
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Dec 6, 2012 13:26
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chippy posted:There's also the embedded programming microthread here: http://forums.somethingawful.com/showthread.php?threadid=3500975 Mainly I am looking for a PC/Android -> servo interface, with the ability to hang a couple of sensors off of. I suspect the Raspberry Pi can do this, but waiting six months for a board (and the relatively young community around it) is making me look elsewhere. Arduino seems like a decent choice.
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Dec 7, 2012 13:42
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I just want to control four or five servos, to do a sort of robot arm thing with some sensors on the end. I think an Arduino board with a servo expansion shield runs about what a RPi costs. How many servos can you control off a single pi board?
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Dec 7, 2012 15:15
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So apparently you can build a joystick using two hall effect sensors, three if you want a throttle, a magnet, and an arduino and the unojoy library, but only has 6 input pins. Looks like the Adruino Leonardo has 12 analog inputs but only supports keyboard and mouse with no Unojoy support Actually what'd I'd like is a netduino with unojoy support but that's probably not happening. Looks like between the Arduino Uno, Sensors and Magnet I'd be about $40 out the door? $30 for an Uno seems steep but maybe I've been spoiled by cheap "hacker" bits/mini computers like the Pi for $35 and Beaglebone Black for $45...
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Dec 21, 2013 05:54
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I am bad at posting, found the Arduino Thread Hadlock fucked around with this message at 06:35 on Jan 28, 2014 |
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Jan 28, 2014 06:29
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Beaglebone Black finally has native Debian support  *digs BBB out of disused box*
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Mar 14, 2014 03:48
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The Banana Pi looks a lot like the pcDuino with a Raspberry Pi pinout instead of an arduino pinout. At least the pcDuino comes with a low power wifi option @ $40, the pcDuino V2 has the A20 chip (I think) for ~$74
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Apr 29, 2014 06:28
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mod sassinator posted:Yeah any operating system should still allow you to install Python or other languages and start hacking around. It looks like raspbmc is based on Debian, so it should be easy to install any missing programming language packages with apt-get. For example to install mono you would type "sudo apt-get install mono-complete". MIT (yes the MIT) has a great intro to computer science, they have at least three different "semesters" to choose from, I personally did the 2011 course, but I see there's a 2013 course (same material/instructor, different year/semester). This is just intro to CS but it goes all the way through their master's program if you should feel so inclined. http://ocw.mit.edu/courses/electric...uction-to-6.00/ Also includes the (recorded!) TA sessions, lecture slides, notes, quizzes, example code etc. You can go from zero to "code your way out of a cardboard box" in about five hours. It's on youtube and iTunes music store for free. https://en.wikipedia.org/wiki/MIT_OpenCourseWare https://www.youtube.com/watch?v=bX3jvD7XFPs Hadlock fucked around with this message at 03:20 on May 7, 2014 |
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May 7, 2014 03:15
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Is this the correct amount of buzzing for a servo to make when holding position/idle? Looking here it would appear that the servo has a PWM frequency of 5mhz http://learn.parallax.com/KickStart/900-00005 And my code specifies 5mhz: var pwm = new bbbPWM('/sys/devices/ocp.3/pwm_test_P8_13.11/', 5000000); https://www.youtube.com/watch?v=WvThFwL8fN8 Hadlock fucked around with this message at 08:37 on May 11, 2014 |
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May 11, 2014 08:28
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TheLastManStanding posted:That 5000000 is the period in ns, not the frequency, which equates to 5 ms  Warning to others, always check your units. There went four hours of my life. That fixed it, thanks.
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May 12, 2014 03:57
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TVarmy posted:I was wondering if there are any good really small, inexpensive and low powered boards like the Raspberry Pi but instead of focusing on GPIO or graphics, the board instead had better I/O and processor performance and compatibility with SATA hard drives? PCDuino makes some models in the $50-120 range that have SATA ports on them and use the very common ("standard") A10 and A20 allwinner chips This one is $77 and has a SATA port, also has arduino pinouts and wifi, runs ubuntu http://store.cutedigi.com/pcduino3-a20-single-board-computer-supports-arduino-programming/ 
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Jul 15, 2014 01:57
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mod sassinator posted:Check out the BeagleBone Black, it has 7 analog inputs with 12 bit resolution. The only annoying thing is The only annoying thing is that they're never in stock. Get ready for a 6 week wait time... The new Debian OS release is heads and shoulders above the old angstrom release. I've been running mine now for about 2 months now without issue.
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Jul 15, 2014 04:21
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Not sure where else to post this, but I thought this was kind of interesting. On the far left (click to embiggen) looks like an Intel Edison or similar "microcontroller"
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Oct 2, 2014 08:05
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Yeah that is most likely. However, I wonder if they've expanded .Net Micro Framework somehow, similar to what the Netduino guys are doing.
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Oct 2, 2014 08:46
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Apparently the Beaglebone Black got upgraded to a 4GB eMMC and they're finally shipping with a variant of Debian with pin overlay/capemgr support, plus they're actually in stock now. Price bump to $55 though, but they're about twice as fast as a Pi. Previously they shipped with a Linux distribution "Angstrom" which almost nobody tests/builds against except for core functionality software, especially on ARM. In particular USB Wi-Fi dongles. I tried out the march beta of Debian on BBB and it's actually quite good, probably will upgrade my BBB here next month and give it a try. Hadlock fucked around with this message at 08:57 on Oct 27, 2014 |
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Oct 27, 2014 08:53
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My RPi A+ arrived today! Holy crap it is tiny! If you wedge it in diagonally it will sort of fit in an Altoids tin with the lid closed (but not lay flat). For a robotics project it's very price and power competitive, not to mention size competitive! With the additional GPIO, smaller form factor and better mounting holes the guys working on the Arduino Tre are about to be eaten for lunch. 
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Dec 7, 2014 01:04
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I dunno if I'd call it ghetto, this is custom compiled code for that specific GPU, nVidia's CUDA is sort of an abstraction layer. Performance wise in theory this has the potential to be faster than abstracted CUDA. Either way, that's pretty neat. Could you possibly compile large sections of OpenCV to run on the GPU?
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Jan 2, 2015 21:45
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Vavrek posted:I use a tiny Edimax adapter. They've even added "Ideal for Raspberry Pi" to the item name on Amazon. (They are pretty great WiFi adapters, if you don't need 5GHz or a big antenna.) In the latest Debian releases for the BBB the Edimax adapter is supported at boot as well. Sometime in the last 18 months it became a gold-rated supported device for Debian in general. Chiming in to say I use the Edimax on my A+ and it works great.
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Jan 4, 2015 19:26
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Is there a way to talk to the Raspberry Pi over the USB power connection? This was really handy for the BBB, I could toss it in my bag and get some work done on a road trip or whatever. Hook it up to the usb port and SSH in to the board via putty over a COM port. Magic. I've sort of come up with a workaround where I use my phone as a hotspot with the same wifi credentials as my home wifi router and then run a powershell script to ping all the IP addresses in the /24 block but that's kludgy at best
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Jan 11, 2015 23:40
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ante posted:You can't bring a short ethernet cable, too? It's an A+ model with an edimax USB wifi nub, no RJ-45 jack I do have some serial->BT adapters floating around, establishing an X session over 112 kilobaud serial would be a trip Seems kind of silly I can't talk to it without an intermediary when it's plugged in to my laptop via a data cable. I guess you could setup some kind of script where if after 2 minutes if it can't connect to a known AP it switches over to being an access point that you can connect to. That seems like an awful lot of work though.
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Jan 12, 2015 03:19
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Oh I have a BT dongle; I can just SSH in over that instead of wifi; it looks like this is pretty straightforward.
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Jan 12, 2015 05:47
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The pi dies when you try connecting to the router, or the router dies and nothing can connect to the internet anymore? If it's the first you may have too many devices attached to the pi on an unpowered hub. If it's the second, what are the model numbers of the dongle and router
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Jan 18, 2015 20:07
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Having a reliable distro (something the Beaglebone Black lacked until about March '14) and a wide variety of plug'n'play "hat"s with a good driver base is about 90% of what people are looking for I think. Arduino is still king of the lowest-end microcontrollers despite about a bajillion competing devices with both better specs and at a lower price point, based on the same ideals of good SDK and supported hardware add-ons. It's really, really nice to have google results show up for whatever error you're getting on the Pi, vs the random chinese knockoff board of the week. Probably going to pick up one of these B+ to use as a dedicated VPN server. 1GB RAM is tits though, they're going to bury the Beaglebone Black now, along with the long-delayed Arduino Tre. All they need now is Cloud9 prepackaged, running on port 81 and they're golden. Oh, random sidenote, on the A+ with the edimax usb wifi nub, I see about 130mA draw, although it will spike to about 250-280mA shortly after boot. Once it boots it will happily respond to pings and SSH sessions powered from of a 250mA-rated 5v solar panel (just barely larger than a playing card), just don't try anything CPU intensive. I think with an ultracap wired inline I could probably get it solar powered. Hadlock fucked around with this message at 04:06 on Feb 2, 2015 |
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Feb 2, 2015 04:01
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They were on track to do 4 million units shipped in October, 5 million by end of year 2015 is a reasonable assumption. That's about $60 million a year in revenue for a company with less than 200 employees. Even if only one in a hundred Pi get plugged in and the owner mentions it to a friend, that's an incredible amount of word of mouth, well past the critical mass needed. The Odroid stuff is probably faster, but by how much? 3%? 8%? Being able to Google the answer to your problem instantly is worth a lot to most users.
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Feb 3, 2015 06:58
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I would imagine the version of "windows" the Pi is getting will look a lot like Microst Hyper-V Server 2012 R2, i.e. it boots to a "gui" with a single cmd window and a single powershell window. No explorer, no directx. Probably shipping with .net v5.0 to run command line apps, and RDP access but not much else. Oh, and task manager. (Full disclosure: I run a Hyper-V VM lab at home) http://www.itwriting.com/blog/6509-microsofts-hyper-v-server-2012-too-painful-to-use.html  Maybe it will have a ruthlessly cut down version of explorer, a copy of Spartan (son of IE) or some Pi-specific GUI? They've already said that it won't be capable of running MS Office.
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Feb 4, 2015 08:11
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I don't think it'll be nearly that ugly, but in terms of functionality I'm expecting it to have the Athens IoT kernel with custom GUI, not a slimmed down RT kernel. I'm trying to demonstrate the out of the box functionality, mainly as a vehicle to run custom .net apps and scripts, rather than a traditional consumer windows desktop. Windows 10 apparently has a modern looking console window (finally) although I haven't tried it out myself. Kind of interested in what they come up with for the GUI, as it's a free product not meant for business users, and not directly tied to their main product, which really frees them up to do something even more wild than their failed Metro experiment. They could do something in the Win7 starter edition to Metro specturm, or do something wild like the old Moblin/Meego or first gen Ubuntu Netbook Remix (which eventually morphed in to the cancer that is Unity). They're not tied to anything at all so they could go in any direction with no real repercussions. A lot of Pi HAT displays are fewer than 640x480 pixels so I wonder if they'll take that in to consideration. Pi HATs lend themselves to single purpose full screen applications so the underlying OS doesn't matter so much as long as it gets out of the way and doesn't hurt performance or battery life.
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Feb 4, 2015 09:01
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Has anyone gotten coreCLR to compile on the Pi yet? I've seen some instructions but they were 64 bit only.
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Feb 5, 2015 03:47
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Bus Pirate is $30, for $55 you can get a Beagle Bone Black which plugs in to your PC in the same way (i.e. SSH in to the device over usb), but can run independent of the PC once you get the code sorted out. Comes with an onboard Python/Javascript IDE, also 4GB of onboard eMMC so you don't have to shell out $8 more for the SD card like you do for the Pi 2 (which is going for $45 on Adafruit right now, so $45 + 8 = $53, and doesn't have the "SSH over usb" capability of the BBB.) https://www.adafruit.com/products/1996
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Feb 7, 2015 01:19
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YouTuber posted:Given that we've moved onto the second generation of development boards wouldn't now be a prudent time to kill the thread and make it a generic thread for the Raspberry Pi and other boards: O-Droid, Beaglebone Black, Banana Pi etc etc? Yes. Please Raspberry Pi Bananna Pi Odroid C1 Beaglebone Black ESP8266 Edison/Galileo Did I miss any? Onion Omega looks neat but I don't think they've even started their Kickstarter yet. Hadlock fucked around with this message at 03:14 on Feb 8, 2015 |
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Feb 8, 2015 03:02
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google for "xenon flash emp" yields two conflicting theories. I agree with the first one, but the second one has interesting osciliscope graphs. Not sure I buy "the raspberry pi is a solar panel!", but the chip acting as an antenna from the EMP blast created by the xenon flash sounds plausible.quote:https://news.ycombinator.com/item?id=9016171 internets posted:https://news.ycombinator.com/item?id=9015663
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Feb 8, 2015 09:27
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What is the cheapest out the door price for a Pi 2.0 1GB? I am seeing $48 shipped on ebay, can anyone beat that?
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Feb 20, 2015 08:21
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Now that people are writing assembly on bare metal pi, how far away are we from an arduino style bootloader with serial over gpio? That would be nearly the same as arduino but with a 1ghz processor and 1gb ram, and reading from SD instead of internal chip flash.
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Feb 20, 2015 19:22
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I would get a load sensor (bathroom scale sensor) and put it under the entire coffee pot brewer, then wire the "brew" switch (they're normally momentary) to a GPIO. You might have to disassemble a digital scale, I dunno. They're $10 each online and a digital scale has between 2 and 4 plus a display for $30 Every time the GPIO goes low (BREW), take a photo along with a weight reading and tag it as [BREW], then also every time the load sensor detects a change of > 3oz worth of coffee, take a weight reading and photo 45 seconds after the weight stabilizes. Between the BREW events with weight and regular mapping of carafe weight you should be able to build a pretty usable graph, with a way to click on individual points and get a photo to backup the status of that point in time, something like this? 
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Feb 22, 2015 21:11
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Zero VGS posted:I got one acronym for ya: HEVC 0:38  
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Feb 27, 2015 04:09
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nonentity posted:Edit: Please post pics on mounting display and keyboard. Kind of a shame you cut holes in the waterproof case, it would have been a great chance to make use of dual inductive chargers
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Mar 1, 2015 06:46
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PBCrunch posted:I get the feeling with the C1 that development will completely stop when Odroid releases their next model, where Pi 2 development will continue until the end of western civilization. Pretty much this. Pi 2 is "good enough", may someday run a variant of windows (pending), and has outsold the odroid and banana pi combined 10 to 1, it's already reached arduino status. That extended long term support is a big deal going down the road. Most everything written today will still run on the original model A.
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Mar 5, 2015 21:18
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I was never able to get USB spin down to work normally in Unix using Centos or Ubuntu in 2012, I don't think it's improved since then. What you're describing sounds identical to my troubles.
Hadlock fucked around with this message at 22:58 on Mar 6, 2015 |
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Mar 6, 2015 22:51
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Depending on your use case it may be worth your while to just go SSD and forget about the whole thing. Alternately if you're using something like a WD Red it's probably preferable to have it not spin down but once a week. Once spun up a rotational drive uses less than a watt of power which is about double what the Pi uses at idle.
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Mar 7, 2015 00:31
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I see the Samsung MZ-75E120B 120GB SSD for $80 shipped on Newegg, that's barely $20 more than the cheapest rotational drive.
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Mar 7, 2015 02:29
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Jamsta posted:Raspberry Pi 2 VS Orange Pi VS Banana Pro That's pretty neat that you can power the Orange Pi directly off of a 3.7v cell, and charge off of the the Pi's USB port. The build quality seems so-so but having integrated 3.7v support is a huge plus for a first battery powered project like a tiny homebuilt laptop.
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Mar 9, 2015 01:55
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