Electronics > Beginners

Circuit to lower Sine wave frequency

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soldar:

--- Quote from: rstofer on November 01, 2019, 08:48:12 pm --- We still don't have an answer to milliwatts of megawatts.
--- End quote ---

Not only that but it needs to be clarified whether he is just trying to get 40 Hz or whether the 40 Hz needs to be in sync with the original frequency. Because they are radically different problems.

Zero999:
Use a fullwave rectifier to get 200Hz, divide it by 5 to get a 5Hz squarewave and pass it through a low pass filter to convert it to a sine wave.

SparkyFX:
Getting a 40Hz in sync with 100Hz is unfeasible, unless it needs to start synced or so, but then its just as good as  triggering a second source.

bob91343:
Use an electronic piano keyboard.  The lowest E (on a full keyboard) is close to 40 Hz.

jeroen79:

--- Quote from: Alfgan on November 01, 2019, 09:08:36 am ---I was only interested if it is possible.

--- End quote ---
Then the answer is "Yes".

But if that is all you want to know and you have no actual application for this then there is little use in coming up with an actual "circuit to lower a sine wave frequency".

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