So is there enough interest for me to make a batch of about 25 boards?
Presumably you will be using the RW line rather than delays to determine when the LCD is ready to accept data.
QuotePresumably you will be using the RW line rather than delays to determine when the LCD is ready to accept data.Yep. Its got a dedicated chip so there is no need to cut corners with the pins. Also I just realised that I can make the backlight brightness variable.
If you do want to put the Arduino bootloader on it, you should probably do a lot of testing to make sure it doesn't cause any problems.
Looking good!More a passing thought then a suggestion, but I was wondering if you would gain real estate and lower cost replacing the contrast pot with a transistor and capacitor driven from a spare onboard pwm pin. Providing the arduino with software commands to increase and decrease contrast may be more convenient then getting at the pot.
... i use these monochrome nokia displays (monochrome, 84px x 48px). i have the code working and really would like to work on a library if someone would be willing to assist.
hej cheater, great idea! just 2 questions: do you target a special LCD or is your board supposed to be a general garphics card?
i'm asking this, because i use these monochrome nokia displays (monochrome, 84px x 48px). i have the code working and really would like to work on a library if someone would be willing to assist. the problem with this display is, that it works on 3.3v and comes with a pretty annoying connector which like cries for a custom board.
my second question is a general question on your first design. do you (or anyone) have experience on running an atmega on the internal oscillator at 8Mhz? just maybe you don't need the crystal and can save that space. if the communication uses a clock line i wouldn't see a problem with timing or speed. what do think?
as for a backlight transistor: i think bc-337 and 2n2222 would be suited. at least these i've found to meet very often, and if i remember correctly support a max of 400mA (or was it 800?).
if we could find a reasonable priced way to get them here to berlin, i'd be interested in at least 2 of these :-)