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Old Feb 12, 2014, 08:48 AM
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United States, IN, Indianapolis
Joined Dec 2011
280 Posts
I have never messed with Microchips MCU's. I have one but still have yet to take it outta da package. Use atmega there is much more support and documentation on those.
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Old Feb 12, 2014, 10:09 AM
AndyKunz's Avatar
Joined Sep 2001
25,935 Posts
It's easy hardware to do and just give yourself an interrupt. You can convert the analog to digital by letting a little hardware watch the slope and zero-crossing for you, with a timer to give you advance.

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Old Feb 21, 2014, 04:52 PM
Registered User
United States, ID
Joined Sep 2011
646 Posts
Better yet, use a uC with an internal comparator. The 12F1840 has a nice one.

Then you can set the voltage you want AND get an interrupt.
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