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Hi,

I'am looking for a cheaper alternative for the "Pololu Jrk 12v12 USB Motor Controller with Feedback"( http://www.pololu.com/catalog/product/1393).   I want to control a linear actuator with feedback, like this one:

http://www.servocity.com/html/560_lbs__thrust_linear_actuato.html

Does anyone have a good suggestion?

Thanks in advance!

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You might use one of the below linear actuators with feedback, an h-bridge from ebay, and the arduino to do what you want.

http://www.firgelliauto.com/default.php?cPath=109
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Check out satellite dish positioners. For feedback, they use a microswitch attached to the drive motor giving a pulse each rotation...
This translates to one pulse per mm or so (varies) of the actuator.
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Thanks for the advice. Zoomkat I have one question, how do I connect the feedback with the ardruino?
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