@ Ian, sorry, I didn't refresh!
but yes, a VCR indeed is much closer to the device I'm thinking of. Are you implying they actually MAKE these things? Because you should link me up with one because I can't find anything using my google.... But that would be really neat!
@amspire
I think you aren't understanding me the same as Ian because PWM is a varying voltage, not a resistor. Yes, I know I can limit a current by switching a circuit on and off with PWM, but that isn't a real resistor. What I mean is like a thermister but instead of varying with temperature, varying with voltage.
oh, and i'll put this here again too!
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