I need a (what I assume is) fairly simple circuit that can drive a small stepper motor. By small, I mean something like this:http://www.sparkfun.com/products/10551
400mA @ 12V max.
This would be placed in a clock, so it would need to use a crystal/oscillator of some sort to keep accurate time.
I would need it to rotate the motor at a specific speed(s), something along the lines of 3 Rev/Hour. If this speed could be adjusted in specific increments, that would be great, but a fixed speed would be acceptable.
Input voltage would be up to you, but something in the 6~12 vdc range would be ideal.
I am currently using geared AC synchronous motors for this application, but it less than ideal since they won't work properly internationally.http://www.chainclocks.com
for a practical view.