View Single Post
Old 06-08-2008, 09:22 AM   #2 (permalink)
dcb
needs more cowbell
 
dcb's Avatar
 
Join Date: Feb 2008
Location: ÿ
Posts: 5,038

pimp mobile - '81 suzuki gs 250 t
90 day: 96.29 mpg (US)

schnitzel - '01 Volkswagen Golf TDI
90 day: 53.56 mpg (US)
Thanks: 158
Thanked 269 Times in 212 Posts
I've thought about that too (well, not the advertisement bit). FYI, MPG on the rear deck could theoretically be done to a mpguino for about an extra $10 in parts and some fancy finger work.

Basically you would buy a bunch of LEDS and build an oversided LED number display (think black cardboard with a bunch of holes in it and hotglue). Then get an additional atmega168 and program it with your duino board to accept a number over the serial port and display it on the jumbo LED display.



Note: there are enough pins on a duino/atm168 to support up to an 8 digit numeric LED display without extra chips, but you would need 64 transistors to control the segments. So probably worth it to get a MAX 7219 like in the arduino playground example: http://www.arduino.cc/playground/Main/LedControl
__________________
WINDMILLS DO NOT WORK THAT WAY!!!

Last edited by dcb; 06-08-2008 at 10:10 AM..
  Reply With Quote