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Oscillator Help Answered

Hello,

I was wandering if you guys would like to help me out with a quite simple little project. I am looking at making a simple oscillator that could be pumped through a normal musical instrument amplifier. I'm not looking at using any IC's (555, PIC etc...), simply some resisitors and capacitors connected to a audio output and a Rheostat.

So my question is this. An oscillator (in terms of electronics) is simply a electronic current that goes from one very high frequency to a very low one, right? So could a just use a fairly big capacitor and a very big resistor and would it be listenable through a speaker?

Discussions

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Goodhart
Goodhart

7 years ago

A capacitor and resistor will not vary the frequency. The resistor, at best, will slow the rate of discharge from the cap. but will not change it's frequency.

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steveastrouk
steveastrouk

7 years ago

No, you can't make a passive oscillator. You HAVE to have a transistor at least.

An oscillator is a thing that oscillates, and does so indefinitely. A VARIABLE FREQUENCY oscillator can change have its frequency changed.

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caitlinsdad
caitlinsdad

7 years ago

I think your setup would just give you a one-shot click or a pop that can damage your speakers if you are not careful. I don't think you could vary that rheostat on and off fast enough to get a good tone, that is done by getting the 555 to oscillate.