Re: converting line level audio to resistance?

"Mad Scientist Jr" <usenet_daughter@xxxxxxxxx> wrote in message
news:1127165517.672972.6360@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>I need to take a line level audio signal and convert it to resistance
> in the range between 0 Ohm and 1 MOhm. Is this difficult to do for a
> beginner in electronics?


Well, so far you seem to be getting responses that, while perhaps relevant,
might not be helping you solve your problem.

That might be partly because doing what you suggest is a bit unusual, and it
might be that you are approaching whatever broader problem you are trying to
solve in the wrong way. So if you tell us what you're trying to do, that
would help.

But to answer one thing I think you might possibly be asking: if you mean
that you want to create a device that has an audio line level input and an
output that behaves like a resistor whose value varies predictably with the
input voltage, yes it can be done but it is challenging. The hardest parts
are getting it to be linear (or logarithmic or whatever you're aiming at),
and getting it to be fast enough to deal with audio frequencies. (And as
others pointed out, the 0 ohm part is impossible; you might be able to get
10 ohms, or maybe even 1 ohm, but 0 is physically impossible.) Think in
terms of using the input voltage to control the drain-source resistance of
an FET.

There are a lot more aspects of this you'll need to specify in detail in
order to get a more useful answer.


.

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