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Signal Modification
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Signal Modification

by bman22 on Sun Sep 12, 2010 3:36 am

I have been trying to figure out some simple circuits for modifying an AC sine wave using basic components, nothing fancy. I tried inductors, capacitors, all that good stuff, and the only one had any effect on the wave, other than amplitude changes. Does anybody have any circuits that will modify a sine wave, using just simple components? I am trying to make some simple effects pedals for my electric bass on the cheap, and I would prefer to not have to buy any op-amps or anything like that.
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Re: Signal Modification

by Entropy on Mon Sep 13, 2010 1:55 pm

So you're looking to construct some guitar effects?

Without using active electronics (transistors, op-amps), the only thing I can think of is to use diodes (or Zener diodes) to provide clipping (a form of distortion).

Anything that is linear (resistors, capacitors, inductors) will have no affect on a pure sine wave other than altering phase and amplitude. A complex sine wave (multiple frequencies) is a different story, since in this case, you can construct filters.
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