Re: converting line-level audio signal to resistance?

Can someone explain how you would take a line level audio signal and

>conver it to resistance in the range of 0 - 1 MOhm? Any help >appreciated...

Then I wrote:

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


                      +---[R]--+        +---->OUT
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Reply to
John Fields
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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
Reply to
Mad Scientist Jr

Then I wrote:

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


                      +---[R]--+        +---->OUT
 Click to see the full signature
Reply to
John Fields

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]------------+
--
John Fields 
Professional Circuit Designer
Reply to
Mad Scientist Jr

--
AC referenced to ground (GND)
Reply to
John Fields

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