Do you think that your kit could evolve in the future in something like single pcb board solution as this "basic" CAN OBDuino. Obviously with that added functionality it doesn't have to be 1 DIN frame size oriented as Frederic
is planing for his boards:
http://ecomodder.com/forum/showthrea...ress-9643.html
OBDuino Hardware
OBDuino
According to this french written blog,
OBDuino pcb kits should be available Q4/2009 at pricetag < $75
http://www.hyperkilometreur.com/blog/?cat=6
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And with such complex project why don't you just migrate up to ARM9 level,
you then can run it on WinCE5/6, Android, Linux/Angstrom, .. , including 3,5" touchscreen or bigger
http://www.watterott.com/ARM9
http://www.friendlyarm.net/home
http://www.andahammer.com/
http://ecomodder.com/forum/showthrea...uino-8778.html
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and/or alternatively there is this PAL/NTSC TV shield called TellyMate
for Arduino, which could run small LCD panel, many code samples here:
http://www.batsocks.co.uk/products/S...e%20Shield.htm
http://www.batsocks.co.uk/products/S...d_Examples.htm
now incl. new firmware for larger/custom fonts&graphics:
http://www.batsocks.co.uk/#nogo
hooked to 3,5" 4:3 TFT (.5W) 640(H) x 480(V) RGB car display
(sold as for CCTV camera):
http://cgi.ebay.co.uk/ws/eBayISAPI.d...m=310100862640
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OBD-II project for RAV4-EV:
http://www.idleloop.com/robotics/RAV4-EView/