converting line-level audio signal to resistance?

Three things come to mind - the last two are to amplify it and drive a servo motor connected to a 1MOhm pot, the other to run it into a A/D converter and then use that to drive a digital potentiometer IC. The first thing is what are you trying to achieve?

Ken

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Zero ohms is tough, but here's a start:


                      +---[R]--+        +---->OUT

I basically want to control a video game (the paddle controls are 1 MOhm pots connected to 5V DC) with my stereo. See "paddles"

I don't think it has to be zero ohms exactly but a low amount.

Can you direct me to a legend for your ASCII diagram?

Thanks

Then I wrote:

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Zero ohms is tough, but here's a start:


                      +---[R]--+        +---->OUT

AUDIO> is positive or ground or both? [C} is capacitor? how much? [R] is resistor? how much? what is [LDR] ? is this a light sensor ? [LDR] has 2 outputs, do these go to the +5v and gnd of the paddle? What is the [POT] between Gnd and Vcc? Is this to adjust the gain of the audio driving the LED? What is Vcc?

thanks

Not really. Just view it using a fixed pitch font like Courier and if it still doesn't make sense post back with what you don't understand.

+---[R]--+ +---->OUT | | | | [LED]--> [LDR] AUDIO>---[C]----+-----+--|-\ | | | | >--+ +---->OUT [R] +--|+/ | | GND>------------+ | | | [POT]------------+

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John Fields 
Professional Circuit Designer

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AC referenced to ground (GND)