Help - Gear Motor Controller

[dteshome]

Does someone know someone who can help me write
or buy and implement the proper controller - circuite
to control a gear motor?

The gear motor has an arm (attached to to it horizontaly)
that rotates in a circular manner and stops at 12
positions around the circumfrance.

I am in the Los ANgeles area and would appreciate someone
who can help be design the necessary components, of cource
for a few.

Thanks.
Dan