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which potentiometer to use for time lapse motor

I was looking at a camera slider and this motor for a time lapse slider: http://www.amazon.com/gp/product/B00436ULLA/ref=ox_sc_act_title_6?ie=UTF8&smid=AUUK2J4ODEV5F
I read somewhere online that someone used a rotisserie motor and hooked it up to a camera slider for a time lapse of about 40 minutes, but if I wanted to make the motor move even slower for a longer time lapse, can I hook up a potentiometer somewhere in the rotisserie motor? If so, what type of potentiometer should I get? Would this work: http://www.amazon.com/Parts-Express-10K-Ohm-Potentiometer/dp/B0002KRE20/ref=sr_1_1?s=industrial&ie=UTF8&qid=1355018144&sr=1-1&keywords=potentiometer

Use a little adjustable voltage regulator, like the L200. Using a pot stops the motor working properly.

Better still, gear the rotisserie motor down with belts and pulleys.
dylanp1936 (author)  steveastrouk1 year ago
Would this work? http://www.amazon.com/Manual-Variable-Speed-controller-connector/dp/B002D3DK1I/ref=sr_1_12?ie=UTF8&qid=1355095573&sr=8-12&keywords=variable+voltage+regulator
Probably not well. What voltage is the rotisserie motor ?
dylanp1936 (author)  steveastrouk1 year ago
the motor is 3 volts, and some of the reviews said it only works at 12 volts. Can you link to the L200, I can't seem to find is anywhere.
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