Update:
Ok I ordered my parts, which I deviated slightly from the list Gary had. Here is what I ordered:
DigiKey:
1 - EG1540-ND SWITCH ROCKER DPDT 15A 125V; $2.75
1 - EG1841-ND SWITCH ROCKER SPDT 15A 125V; $2.05
SparksFun:
1 - 12.95 - COM-09765 - 7-Segment Serial Display - Blue
1 - 52.95 - DEV-08279 - Development Board for AT90CAN128 - AVR-CAN
1 - 0.25 - COM-10301 - Zener Diode - 5.1V 1W
1 - 0.5 - PRT-10650 - Ribbon Crimp Connector - 10-pin (2x5, Female)
2 - 3 - PRT-08506 - 2x5 Pin Shrouded Header (1.5000 ea.)
1 - 1.95 - DEV-09215 - AVR Programming Cable
(DELETED)
1 - 0.95 - PRT-00110 - 9 Pin Female Serial Connector - Solder Cup
Ebay:
2 Push Button MOMENTARY Switch 1NO 2A 36VDC 19mm SPHERE
OBD2Cables:
1 - 142602 Cable, J1962M Right Angle to Open, 9ft
Polou:
1 - #1905 0.1" (2.54mm) Crimp Connector Housing: 1x6-Pin 10-Pack = 0.79
1 - #1912 0.1" (2.54mm) Crimp Connector Housing: 2x4-Pin 10-Pack = 0.79
1 - #1800 Wires with Pre-crimped Terminals 50-Piece Rainbow Assortment F-F 6" = 9.95
Here is a concept pic that would fit in the change tray:
Will have more on my progress as parts come in.
Thanks Gary!
Dan