You can use the same idea from this page :

http://medo.fov.uni-mb.si/mapp/ds_adc/index.html

The conversion time is something about 10 mS.

Regards.


On 4 Feb 2002 at 20:08, juan manuel garofalo wrote:

> 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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---
Marcelo Puhl
Mensa Brasil member
http://www.mensa.com.br

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