Anyway I'd ask how frequently different solenoids might be going on or off - minutes, seconds, or several per second? Also how many will be on at any given time, and how many (in theory) might click on or off at a given instant. Several per second. I would say about a max of 16 will be on at once, ...
The solenoids will be several meters from the pi. The solenoids themselves will be small low power devices. Hopefully, that deals with radiated noise. As for noise coursing through my house's mains cables - is this a real probability that I definitely need to deal with? Will other computers in the h...
Wouldn't the solenoid drivers and then shift registers be first in the line of attack for conducted noise? But in any event, a breakout board that isolates the pi from my deadly EMP machine (!) should do the trick, no?
ok - so I thought I would go and order myself a 74HC595 and a Gert board and get the project underway. Until I discovered that getting a Gert board is not going to be possible anytime soon. So can anyone recommend a easily sourced similar board? Something to (opto?) isolate the pi from my naive thra...
Thanks, Mike. This is exactly the sort of thing I am looking for.
Yes, a lot of power is required if all 256 solenoids are active at once. A compromise to the application may allow me to limit the total number of simultaneously active solenoids. And can you imagine the racket it will make!
I have a requirement to control a real-world analogue machine using the pi and some control electronics. Can't really spill the beans about what the machine is at this stage, so please bear with me. There are potentially many controls on the analogue machine, maybe up to... a convenient 256. I inten...
I managed to get a ZyXEL NWD2105 working on my pi but I don't suffer the issues you describe. I connect with WPA. I posted about it a while back. I have no idea whether this will help you or not, but on my pi I updated my firmware using Hexxeh firmware updating tool... http://hexxeh.net/?p=328117855...
I checked my SD card with various SD card checkers - and there were no reported errors. So I re-flashed Debian 'squeeze' on to it and the pi has come back to life. I am a little concerned about this - if the SD card is not dead then I guess something me or the o/s did killed Linux somehow. The 'weir...
I've had my pi a just over a week. It's been working perfectly, up until now. I just rebooted it and I get (from memory)... ... boot up sequence ... List of all partitions b300 ... b301 ... b302 ... b303 ... No filesystem found mount root failed, tried ext4 Kernel panic - not syncing: VFS: Unable to...
@ Abishur - how are you going to interpret and use the poll results? Also, how will you factor into the results the profile of the respondents e.g. if forum 'dislikers' are more likely to respond than 'likers' you may end up with a false or skewed result. How will you factor into the results those p...
I've answered my own question. Here's a mini how-to (probably) for the ZyXEL NWD2105 wifi adapter (sort of assumes you are running headless)... login sudo apt-get update sudo aptitude -t squeeze-backports install firmware-realtek sudo apt-get install firmware-ralink sudo apt-get install wicd startx ...
Bit of a long shot, but here goes... I'm attempting to get a ZyXEL NWD2105 wifi adapter to work with my pi. According to http://elinux.org/RPi_VerifiedPeripherals#USB_WiFi_Adapters it's on the 'working' list. I followed message 17. of http://www.element14.com/community/message/50015#50015/l/re-insta...
The front page search looks like a google custom search - I just tried it (hdmi to vga) and most of the results point the old (now none existant) forum. Perhaps it will get better once the google bot has hoovered up the new board's version of the posts.
Well, they are evidently not too short. If I type in "hdmi to vga" I get the same error message. If I type in to Google "raspberry pi hdmi to vga" the first link I get is http://www.google.co.uk/url?sa=t&rct=j&q=raspberry%20pi%20hdmi%20to%20vga&source=web&cd=2&sqi=2&ved=0CG8QFjAB&url=http%3A%2F%2Fww...
I'm probably being dim but when I type the following into the new forum search thingy.. "vga" "hdmi" "vga hdmi" I get the message... The following words in your search query were ignored because they are too common words: vga hdmi. You must specify at least one word to search for. Each word must con...
<t>dom said: <br/> <br/> <br/> 224 for no video or 3D<br/> 192 for video or simple 3D<br/> 128 for video and advanced 3D<br/> <br/> <br/> Tried 192 and both 3d and video tests work. Thanks, Dom.<br/> <br/> I have to say the quality of the 3d and video are quite amazing - and from such a teeny device...
<t>Ah, well yesterday I updated my firmware with Hexxeh's rpi-updater.<br/> <br/> Hexxeh's Git says...<br/> <br/> [By default, the 224MB memory split will be used.]<br/> <br/> So it sounds like I am. What split do you recommend?<br/> <br/> @Hexxeh (if you are listening...) @dom : could you tell more...
<t>I just rebooted and plugged it in to my TV - still no luck but with different error...<br/> <br/> > ./hello_triangle.bin<br/> hello_triangle.bin: triangle.c:167: init_ogl: Assertion `state->surface != ((EGLSurface)0)" failed.<br/> Abort<br/> <br/> hello_video does not work, but with a different e...
<t>As per the 'Quick start guide', I'm having a stab at getting an OpenGL demo working - /opt/vc/src/hello_pi/hello_triangle.<br/> <br/> I have compiled it (make) and run it... but it hangs. I gdb'ed it with -g and it is hanging on a swapbuffers...> gdb ./hello_triangle.bin<br/> ...Starting program:...
<t>The_Saint said: <br/> <br/> <br/> I can buy any number of second hand bargains that aren't the same as something new but costs about the same. I'm not sure what that proves.<br/> <br/> <br/> 'second hand'? Does '2nd user Compaq base unit' mean it is a 'Compaq base unit' that is second hand - or d...