Hi there:


Does it make sense to build an ADC using a PWM output, low pass filtered and
a comparator from a 16f627 ?

My idea is to conect the voltage i want to measure to one input of the
comparator and the pic's PWM output to the other input. Then i sweep the
duty cycle from 0 to the point  at wich the comparator changes. My guess is
that it's not a very fast ADC, but that's not a concern. Is this a workable
solution or are there any gotchas i should be aware of  ?


Thanks in advance.

jm

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