I have the B00011-R277 board.
I have been following the Wiki docs on the Panasonic EDMGRB8KJF LCD and I need to know were to get 3.3v from.
The breakout-gs card only has the supplied power 4v, if I have read the docs correctly.
From: Michael Petchkovsky <mkpetch@in...> - 2006-04-02 12:45:46
On Fri, 2006-03-31 at 14:01 +0000, rkwiles@... wrote:
> I have the B00011-R277 board.
> I have been following the Wiki docs on the Panasonic EDMGRB8KJF LCD and I need to know were to get 3.3v from.
> The breakout-gs card only has the supplied power 4v, if I have read the docs correctly.
You'll have to provide the voltage for the screen yourself :)
How are you powering the gumstix? wallwart, battery? You need to figure
out how to incorporate a separate voltage regulator into your power
A really simple and commonly available regulator is a LM317, you can
find a datasheet here http://www.national.com/pf/LM/LM317.html and you
can google for simple circuits. That regulator is variable output so
with the correct resistor you can get a suitable voltage for the LCD.
There's also fixed 3.3v regulators ...
In an earlier post you said
"As you can tell I am not an Electrical Eng. but a Software Eng."
Don't worry it's a pretty simple circuit, you can set it up on
breadboard or with wire-wrap. You will need a voltmeter to verify the
output voltage. You'll end up with something like this if my ascii-art
____|____ _____ _|_
|regulator|_____| LCD |==| |
|_________|3.3v |_____|==| |gumstix/breakout
| | |
where the regulator block is a 3-pin chip plus a resistor or two and
maybe a couple of capacitors if you used an LM317 for eg
There's many variations on how this could be done, hope this helps