 Duty cycle counter.
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Ken M.
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Thu Mar 20 2008, 12:21AM
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Registered Member #618
Joined: Sat Mar 31 2007, 04:15AM
Location: Us-Great Lakes
Posts: 628
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Hey guys,
Is there a way to make a Numerical displayed discrete Duty cycle counter, like say something that will display, "0-99%" on a 7 segment display or a LCD screen?
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HV Enthusiast
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Registered Member #15
Joined: Thu Feb 02 2006, 01:11PM
Location:
Posts: 3068
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Doing this with a fixed frequency is very easy, but when you start varying the frequency, than it gets quite complicated.
The best way to do it, assuming you don't mind a bit of error is using a variation on the op-amp integrator. This makes is pretty easy to do where the duty cycle output will be a DC voltage proportional to the duty cycle. I've used these types of circuits for over duty detection circuits.
In fact, i'm using a similar one in the new XenoSonic Audio Interface controller i'm releasing next month.
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