Unlike a Raspberry Pi, you won't find anything resembling an operating system here; instead, the Arduino uses simplified ...

They're easier to build, easier to program ... In fact you can buy a moving robot straight from the Arduino store for €169 (the equivalent of about £150 or $200). Head to a site like ...

[Jon Bennett] sent us this link to his Wifi Robot. After playing with a Linksys WRT54GL router, he was inspired to build something ... which could be an Arduino or AVR Butterfly.

Getting a robot to stand on two wheels without tipping over involves a challenging dance with the laws of physics.