I just saw this youtube video and thought it would be good to post it here.
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www.youtube.com]
It looks like a very easy way to make an accurate servo out of any dc motor. Of course, I would rather use an interrupter type encoder instead of a reflective. You can get a transmitter, reciever pair that comes in one package for very cheap. It produces a suprisingly clean signal with the comparator. This would make precise motion so much more affordable.
