March Break 2011 - Robot Challenge

R/C robots are fine but I like autonomous robots best. For this March Break I wanted to host a "Build You Own Robot" party for my son and his two friends.

I've built small robots in the past so I thought I would challenge myself to come up with an easy to build, cheap robot "kit" plus code in two and a half weeks.  Here are the results.  A simple one board robot that has three modes; line follower, sumo and finger follower.  Full schematics, PCB and code (source and hex).

The cost is low since it uses many scavenged parts and cheap T-Pro SG90 servos that I found for $2.77 each.  There are things I'd change in a second version but not too bad as an intro.  You can make the board in under an hour using toner transfer.  Servos take about 10 minutes each to modify for full rotation and assembly takes about an hour. YMMV.

Enjoy.