> On Sun, 6 Oct 2002, Jeethu Rao wrote:
> > Hi all,
>  I need a cheap and dirty ADC with a 16f628,
>  Scott's RC based ADC is a good option, but
>  I think there is a way to use the Comparators
>  And the PWM on board the f628 for it. I'm thinking
>  Of making an RC low pass filter for the PWM output
>  And using it for Ref. I should be able to get the
>  Full 10bits accuracy of the PWM (atleast I think so).
>  Is this doable or has anyone tried this?

May be I'm missing something, but why not 16F870?

PIC16F628   18LD  20MHZ 2K FLASH   $2.74
PIC16F870   28LD  20MHZ 2K FLASH         $3.09

Are extra pins a big trouble: ATtiny could be an answer.

 Mike.

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