Here is a quick build I made today, for the fun of myself and my daughter: Sonibot.
I did this one to see how well modified microservos would do as simple geared motors.
I have some of those cheap chinese blue 9G microservos and this morning I wanted to try to mod them as Oddbot described in his LBD post.
So I opened one up, done away with the electronics, chopped off the stops on the case and the pot. Put it back and tadaa real small geared motor !
The results are pretty good :) These guys are pretty well downgeared and pack a lot of torque (well enough to strip gears if not careful).
I'm using RoBotX's uBotino as the brains and a HC-SR04 on a servo as eyes.
I just loaded RoBotX's Julia sketch (with some pin swapping) and here we are: a little StartHere like Arduino based bot :D
It's all made of styro board and hot glue and with a plastic ball as a caster. The wheels are Meccano ... I always wanted to have them on a bot :)
This was done in about an hour with the cutting included.
Here is the back side:
Hope you like it Cheers !