One constraint I had to deal with was keeping costs to a minimum, preferably nothing out of pocket. Fortunately my junkbox has some high quality parts and a BOE BOT I could "borrow" from. All the parts used are still available today. this will be nice when it's time to build the second and third copies. (a swarm of one leaves a lot to be desired)
Please vote for this instructable in the over 18 category.
Step 1: Materials
Materials I used:
Board Of Education microcontroller board from Parallax.com
battery case (4AA cells)
4 AA battery cells
Tamyia track and wheel kit ( I got mine from Amazon)
2 RC servos modified for full rotation (mine came from my BOE Bot, Parallax.com sells them separately)
1 standard (unmodified) servo -- (optional)
5 bolts 1/4" x 3" with nuts
4 bolts #6 x 1" washers and 3 nuts each
1/8" (3mm) plywood 18" x 24"
PC and serial cable (for programming)
screwdriver / wrenches
Lasercutter - You could get by with a fretsaw, or scrollsaw, and a drill press, but a lasercutter is great to have access to.