Re: audio amp with dc output?

Thanks for all the positive responses. The other ones will be ignored.

Here's a bit more info. Fidelity is not an issue. One of my friends has a
new puppy and the dog is deaf. Since it's impossible to call him, I wanted
to build a small device that would attach to his collar and vibrate in
response to noises. All Electronics has a tiny vibrating motor that will
operate on 1.5 to 4.5 volts (CAT# DCM-320) . I assumed that 50mA would be
more than enough to run the motor; there was no current spec in their online
catalog.. I would like to use 2 or 3 AAA batteries so the device is not too
heavy or bulky.

I'll look into using op amps. Been a long while since I've done anything
like this. Should be fun!


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