I've got this potentiometer: http://www.allelectronics.com/cgi-bin/category.cgi?category=search&item=MPOT-10K&type=store and it uses a "small DC gearhead motor" to move. A bit further they say "at 6V DC it takes 8 seconds to go from max to min" or something. As I don't think 6V DC is the max this baby can take, I tried 12V DC and it worked too, however I didn't dear to do it long. My question now is how high can the voltage max be on this motor? I can't see anything useful in that datasheet either...
i'm not sure if i'm right about this, but here goes... withing reason, i don't really think the voltage matters.. it translates into RPM and torque.... you just don't want to leave a voltage applied to the motor after the pot has reached it's endpoint (a lot easier to determine if the RPMs are low)
Okay and how would I determine it when the meters have reached an endpoint? I did notice a higher power-usage (about 120% higher ) when it reached an endpoint.
as you just said the power draw spikes at the endpoint... this is because the pot stops turning, applying stress to the motor (the motor wants to keep turning) - - are you wanting to make the power source stop automatically, or are you just going to turn off the power manually... i'm unclear on your ideas here
Hey I have one of those I ripped out of a boom box, now I can use it. Why not use the micro to detect the resistance value then stop when it reaches the end. (Same way a servo motor moves)
