Previously, Cantin even used a similar Arduino-LEGO combination to responded to another LEGO Stack Exchange question. (Forum posters wanted to know if LEGO city-scale wheels could be motorized.

Hack a Day reader [Stephan Martin] has assembled a clever bargain-basement system using an Arduino-driven stepper motor and a reduction gear system built up from LEGO Technic parts, along with ...

A mechanical and manufacturing engineer by day, [Tyler Collins] taught himself electronics and firmware development in his spare time and created an open source Lego controller called Evlōno One ...

The self balancing robot is equipped with two Lego NXT motors and the open source Hippo-ADK board connects to a Android smartphone or tablet to provide extra processing power and functionality.

Facebook 'likes' come to light with this neat DIY Lego and Arduino project.