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note: want http://www.electronickits.com/kit/complete/elec/ck1612.htm and
either http://www.electronickits.com/kit/complete/motor/ck1405.htm
(unipolar) OR http://www.electronickits.com/kit/complete/motor/ck1406.htm
(bi-polar), depending on what the stepper is.

Also, need to mod kit as shown in:
http://www.orednet.org/~jgarlitz/focus_control.htm

if it’s the bipolar kit, need to figure out how to effect the changes he
suggests (he built off of K109).