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Overunity Machines Forum



Alternative to the 555

Started by Farlander, August 31, 2008, 01:44:54 PM

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Farlander

August 31, 2008, 01:44:54 PM
I've built a pwm using this design.  It generates a variable sawtooth wave when you replace R4 with a potentiometer.

The question now is, can I pass this signal into another set of pins on the LM324 quad-op-amp IC and modulate the duty cycle?

I think this board has potential, it uses fewer components and no decade switching.  A 500k potentiometer should be able to increase frequency even higher.  Check out 'My Experiments' at the bottom of this pagehttp://students.umw.edu/~jsera9mu/wfc%20site/

I'm not sure what the min max frequency are but will know soon as I get a better scope.

I got the idea from a video posted by Hydroman here on this forum, I will link when I find it
Thanks

Car that runs on water
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