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by Tyggerjai
Mon Jun 15, 2015 4:21 am
Forum: Plan 9
Topic: Autostart telnetd/sshd?
Replies: 0
Views: 7681

Autostart telnetd/sshd?

Hi. I've had no problems installing and booting the 9pi image for rpi2, it's great! I'd like to telnet or ssh into the pi, though, from a linux machine. The plan9 documentation for sshd requires editing /etc/ssh/sshd_config, but I have no /etc folder, and trying to create one results in permission p...
by Tyggerjai
Sun Jan 22, 2012 10:41 am
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>If someone reminds me about it, (assuming I get one of the first batch, and allowing enough time for it to get to Australia) then I'll definitely post how-tos for both standard and graphic LCDs, serial and parallel. If you're lucky, that might include the Nokia. The Gertboard will almost certainl...
by Tyggerjai
Thu Jan 19, 2012 2:43 pm
Forum: Other projects
Topic: Controlling Electric Motors
Replies: 5
Views: 1871

Re: Controlling Electric Motors

<t>Yeah, that's a pretty solid full bridge driver. And enough IO pins on the PIC to handle limit switches and encoders and the pin-intensive stuff. Should be a pretty solid base for a robot. One of my first projects will be porting some motor control stuff that currently uses arduinos - I'll keep th...
by Tyggerjai
Thu Jan 19, 2012 8:48 am
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>Having said which....<br/> <br/> On further reading, not sure how friendly/well documented the digikey one will be. If you think you can spare 5 GPIO pins, throw $10 at sparkfun for the Nokia - it's well understood, well supported and there's sample code, at least for the arduino. Otherwise, the ...
by Tyggerjai
Thu Jan 19, 2012 8:35 am
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>Oh, you could easily put a meter or clock on them - they'll make an excellent display for a running program, it'll just be a little harder to use them to log in or get a terminal. So yeah, you could telnet or SSH in, or have a web interface, and use the display just for a clock, sure. In that cas...
by Tyggerjai
Wed Jan 18, 2012 3:14 am
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>Sorry to say, there's no way I have the time or skills to interface the Nintendo screen. As far as I know, they ran directly off the ARM9 CPU on the DS - it was basically a dedicated display processor. The pinouts are documented, kinda, and there was a linux port to the DS, so in theory, someone ...
by Tyggerjai
Tue Jan 17, 2012 11:27 pm
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>Oh. One last thing I've forgotten to clarify. None of these solutions are "displays" in the traditional sense of a monitor. What we're basically doing is re-inventing the serial console. There's a much longer explanation required here about virtual TTYs and stuff, but this is not in any sense a "...
by Tyggerjai
Tue Jan 17, 2012 11:13 pm
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>Also, if you have a lot of spare time up your sleeve, DealExtreme sell a replacement screen for the Nintendo DS for about $10. Your first problem would be working out what protocol it speaks, and your second problem would be physically connecting the ribbon cable, but they're pretty funky little ...
by Tyggerjai
Tue Jan 17, 2012 11:02 pm
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>LCDs are traditionally "parallel" interface - they have 7 data pins (although there are techniques for using only 4 of them), and you need to put data on each pin and then "clock" the data into the LCD all at once, which means you need 7 (or 4) GPIO pins free on the device writing to them. One cl...
by Tyggerjai
Tue Jan 17, 2012 6:17 am
Forum: Other projects
Topic: STICKY: The projects list. Look here for some ideas.
Replies: 232
Views: 373985

Re: The projects list. Look here for some ideas.

<t>Motor control. Homebrew CNC tools are becoming popular, but at the moment, as far as I know, they need a dedicated PC while the job runs. Most people doing it have either an old PC or laptop for the purpose, but it would be great to have a compact, low power solution just to run the motors. You c...
by Tyggerjai
Tue Jan 17, 2012 6:07 am
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

Oh, I should point out that you would need an external power supply. I haven't checked the raspberry pi pin out lately, but I imagine if it's powered at 5v, it's unlikely to have 6v available for peripherals
by Tyggerjai
Tue Jan 17, 2012 6:05 am
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<t>I haven't used that specific one (I have the non-serial ones), but the datasheet suggests that you can simply use the serial TX/RX lines out of the Raspberry Pi. That's assuming you don't need them for anything else.  A better option might be a USB->serial converter on the USB bus if you want the...
by Tyggerjai
Tue Jan 17, 2012 2:35 am
Forum: Other projects
Topic: Inexpensive (Basic Graphics) LCD Display
Replies: 24
Views: 23291

Re: Inexpensive (Basic Graphics) LCD Display

<r>Doable - I'd go the 10168 because it already has a serial interface. Using the other one, I think, would require either a lot of GPIO pins, or some shift registers to do serial->parallel. I'd be tempted to spend the extra and go with this one:<br/> <br/> <URL url="http://www.sparkfun.com/products...
by Tyggerjai
Sat Jan 07, 2012 2:30 am
Forum: Other projects
Topic: Raspberry PI with an arduino...
Replies: 26
Views: 15632

Re: Raspberry PI with an arduino...

<t>Wooloomooloo said: <br/> <br/> <br/> To keep in line with the actual topic, here"s an idea: one - if not the top - reason I"m interested in the RasPi is to use it as a standalone CNC controller (yes I do find lugging around a big honking PC - with a parallel port no less - possibly with a monitor...

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