  We describe a flexible, simple to build, low-cost, and computer-controlled
optical mirror actuator system we developed for undergraduate research
laboratories. Geared motors for hobby robotics are controlled by an Arduino
microcontroller board in combination with an H bridge to finely position the
mirror mount actuators. We present a graphical user interface based on the free
Python script language. The price of the fully controlled actuator system is
thus only a small fraction of the price of any commercial system; however, it
is quickly implementable due to the use of open hardware electronics. We show
the performance of the system and give an outlook for future expansions and use
in advanced optical setups.
