Mohit (Lists) ha scritto:
> 1. Can you do a 'peak-detector' in software? Continuously 
> read the ADC, keep comparing all the readings and the 
> maximum value would be what you are after.

This is one of the methods I considered


> 2. If you know the frequency (F), then detect zero-crossing 
>   and begin to take a set of ADC readings a few tens of 
> milliseconds before (zero-cross + 1/4F seconds) and carry on 
> till a few seconds after (zero-cross + 1/4F seconds). 
> Compare these readings and get the maximum value. This would 
> be less heavy on the processing resources than 1 above as 
> you will be reading the ADCs lesser times per cycle, but 
> will need hardware for zero-detection (an extra PIC pin).



I DO have zero-cross detection since I'll also be driving a 
dimmering-triac, so definitely I'm going to make use of it.

thank you!
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