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.
Step 2: Cut Out the Structural Parts
Step 3: Mount the Drive Gears on the Servos
Step 4: Mount Bogies
Step 5: Install Drive Servos
Shown here with tracks already in place as I didn't take pictures until I had finished putting it all together ...well a few times.
Step 6: Add Circuit Standoffs to Layer Three
Step 7: Install the Lift Servo (optional)
Step 8: Bolt Together Assemble and Install Track
Then assemble and install track. The track just snaps together. Instructions came with my kit. It is easier if the tracks are installed on the drive gear 1st then the bogies and guide wheel.
Step 9: Mount Microcontroller Board
The bolts installed in step 6 should be sticking out of the top of the bot. Place a nut on each bolt down far enough to place the BOE board on the bolts and secure with another nut. Plug the servos in.
Step 10: Mount Battery Box - Program
Step 11: Going Further
It would be easy to substitute a different microcontroller board, or make custom attachments.
Build a copy for yourself, then add to it, change it, make it better. It would be great if you wrote up an instructable of your hacks so the rest of us could gain from your insights and hard work.
Thanks for reading.