3.5" TFT LCD and debian squeeze

[prdk]

Hello,

I've received a 3.5 inch TFT LCD today http://www.amazon.co.uk/inch-Digital-Re ... 039&sr=8-1 and connected it to my raspberri Pi.
It works in general, but I have several questions:
1.Is it possible to do something with the refresh rate? It is a bit dazzling.
2.I found several posts how to change screen resolution under elinux (like here http://www.raspberrypi.org/phpBB3/viewt ... f=2&t=5726), but how can I do it under debian squeeze (http://downloads.raspberrypi.org/images ... 4-2012.zip)?
3.Has anyone found a decent DC adapter, that can provide 5V USB + 12V for the display at the same time?
4.I'd like to use raspberry PI + 3.5 LCD to show some widgets/notifications/etc., like weather forecast or FTSE 100 or whatever. What would be the best way to organise these widgets, ideally on startup without keyboard interaction?
5.Once I have a monitor attached to raspberry pi, how would you solve the "remote keyboard problem"? It is clear I can use ssh+x11 even to create another X11 session, or I can use xvnc to carry with the current session - but is there a way just to emulate keyboard/mouse remotely?

Thanks.

[JeremyF]

Well you can change the screen res using http://elinux.org/RPi_config.txt and http://elinux.org/R-Pi_ConfigurationFile . Don't know about the rest of your queries.

Options I would use:

Code: Select all

framebuffer_height=
framebuffer_width=

[recantha]

Hi there.
I'm doing a very similar thing, so here's my thoughts.

I'm still working on getting the resolution sorted properly, so previous poster's reply should be interesting to mess around with. I have a rear view monitor too, but it's a different type. Mine's not dazzling, but the resolution makes the X desktop unreadable unless you know what it says already Bash prompt is fine though.

The dual power supply idea is intriguing. I did find this:
http://www.simplypowersupply.com/Chassi ... fAodnjvfZg

By searching on Google for:
dual 5v 12v power supply

For question #3. I think what you want is to automatically startx on start-up. This is possible, search around a bit - I've definitely seen it somewhere. After that, I suggest you have a max of 4 windows in X in a grid and make sure the text is readable. You may be limited to the amount of info you can show.

If you're going to VNC, I think you're going to be using x11VNC so you can VNC to the X session that would start up on boot. Then you'd connect via VNC and you should be on the same desktop that's showing on your 3.5".

You're probably best sticking with lxde as your X environment as it's the lightest.

My solution to the input problem is one of these:
http://image.made-in-china.com/4f0j00Oe ... jector.jpg
Not sure if that's the right model. Mine is a Bluetooth keyboard/trackpad which came with a tiny bluetooth dongle that I got working under Squeeze.


Hope this helps - I'm subscribed to this thread if you want to discuss more!
--
Mike

[dasimpson]

if you take the lcd apart you might be lucky and they is a converter circuit that you could bypass to only feed it 5 volt as this persion has here http://www.skpang.co.uk/blog/archives/541#comment-452

[damra123]

Hello,

I've received a 3.5 inch TFT LCD today http://www.amazon.co.uk/inch-Digital-Re ... 039&sr=8-1 and connected it to my raspberri Pi.
It works in general, but I have several questions:
1.Is it possible to do something with the refresh rate? It is a bit dazzling.
2.I found several posts how to change screen resolution under elinux (like here http://www.raspberrypi.org/phpBB3/viewt ... f=2&t=5726), but how can I do it under debian squeeze (http://downloads.raspberrypi.org/images ... 4-2012.zip)?
3.Has anyone found a decent DC adapter, that can provide 5V USB + 12V for the display at the same time?
4.I'd like to use raspberry PI + 3.5 LCD to show some widgets/notifications/etc., like weather forecast or FTSE 100 or whatever. What would be the best way to organise these widgets, ideally on startup without keyboard interaction?
5.Once I have a monitor attached to raspberry pi, how would you solve the "remote keyboard problem"? It is clear I can use ssh+x11 even to create another X11 session, or I can use xvnc to carry with the current session - but is there a way just to emulate keyboard/mouse remotely?

Thanks.

Hey I Got same Thing that you got and i have few questions about it

1-)How did you connect to raspberry pi im newbie here and which rca cable did you use If you sent links from amazon i could buy them instantily
2-)How did you Supply Power for LCD and RPI at same time
3-) If you share 3-4 photos or Video How Its Done It would be Briliant

Thank You
Best Regards,Damra

[dasimpson]

http://www.skpang.co.uk/blog/archives/541#comment-452
this will help you with the lcd and rpi power

[Krebsy]

This'll do the trick...
http://uk.farnell.com/xp-power/jcd0605s ... =lookahead

Or hack the screen to take out the 12 to 5v regulator.

K.

[dasimpson]

for me 4.5 volt is not a low enogth starting voltage

[markw12]

hey guys just a thought for you to consider.. instead of trying to strip a car monitor down to work at 5v why not use a single 12v power supply then use this converter http://www.amazon.co.uk/Car-Power-Conve ... 119&sr=8-2 to change the power from 12v to 5v for the rasberry pi

[dasimpson]

mainly because i am going from 3.7v to 5v in my mod