The second hand movement from a cheap clock motor works real well. It's cheap, It runs on one AA battery continually for over a year, It fits nicely anywhere, It's easy to hook up and it's a stepping motor, not a linear one. Works for me.
Andy From: Ode Coyote The simplest way to control that motor is to use a single D cell to run it and a heafty pot to control the speed. [wire wound?] Dropping 27 volts down to about .5 volts so the motor will run slow enough dissipates a lot of heat and will kill your nines off in a hurry for no reason and toast most potentiometers. Flat wide motors have more torque at the lower speeds. Grab one out of an old CD rom drive. You'll want to run it very slowly to prevent silver/hydrogen bubble deposit buildups [the dread grey fuzzies] and the formation of 'chunks and sparklies'. The best way is to get a $$$ pulse width modulation device. Where? I dunno. Ode
