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Need help changing an AC circuits frequency Answered


Alright, so I have a question about an alternating current circuit I was working on.  The wall outlets I'm drawing power from are AC at 120V, and 60 Hz, but I need it to be 120V at between 60 Hz and 1000 Hz.  A variable system would be nice, but I'm not picky.  How would I do this?  Is my only option to convert the power to DC, and then run it through an inverter?  I would like to be able to do this with a small circuit I could build, something that would fit in a project box.  Any ideas?

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Avren5

8 years ago

Well, for the application, the current really doesn't matter. I know how that sounds, but functionally, the current really isn't a variable. A safety concern yes, but that's about it.

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steveastroukAvren5

Reply 8 years ago

If you've no real power requirements, all you need is a variable frequency oscillator circuit. If you need a reasonable sinewave, a classic Hartley or Colpitts oscillator is a nice way to go.

The old Max 038 was a nice way to make a simple signal gen. Failing that the XR2206 is a good alternative

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steveastrouk

8 years ago

Using an inverter is the simplest way to do it. You don't say what current you want to handle though. Alternatively, an AC motor controller will do what you want.