SCRU-FE: Simple C++ Robot with Ultra-sonic Sensor for Education: Arduino UNO Obstacle Avoidance Maze Programming
Made by geoffsim, uploaded
This version uses a cheap UNO and motor shield. Rather than using screws, I used a hot-melt glue gun to affix the CPU, sensor and battery boxes. As I didn't have the rear wheel bearings to hand, I also designed a ping-pong ball castor.