To fix this, [MechanicalCat] has come up with a current limiter for cheap DC motor controllers. The full write-up is in the included PDF file, and describes the set-up of an Arduino Nano sitting ...

and breadboard-friendly board based on the ATmega328 (Arduino Nano 3.x). It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power ...