Chip'n'Bot V1.0

Little robot friendly, simple and robust based on Arduino UNO R3.
It uses an Arduino UNO R3, an ultrasound detector HCSR04 and 3 servo motor SG90. Servo are fixed with plastic flanges
Technical data:
Dimentions: Long. 120mm | width. 80mm | High. 75mm
Weight: 170g (without battery)
Driving wheel diameter: 60mm
Diameter of mobile: 25mm
You can buy it ready to play (from Switzerland or France only) or electronical stuff on:
http://www.chipandlove.ch
http://www.chipandlove.ch/fr/home/107-chip-n-bot-v10.html
The basic source Arduino code (Chip_n_Bot_V1.ino) is downloadable here: http://www.chipandlove.ch/fr/index.php?controller=attachment&id_attachment=2
Continuous rotating servo modification SG90 tutorial: http://todbot.com/blog/2009/04/11/tiny-servos-as-continuous-rotation-gearmotors/