[sdiy] F2V with PIC or AVR?

[David G. Dixon]

> >> I think Harry Bissell has a F-to-V circuit too, IIRC.
> > 
> > The Bissell circuit is very elegant.  It is based on a two-bit 
> > counter, and only requires two clock cycles to sample the frequency.
> 
> Is it two-bit as in two binary digits, or two-bit as in cheap? ;)

The former, although it doesn't involve anything very exotic.  The circuit
does its thing every four clock cycles.  During the first two it reads the
frequency and generates the voltage, and during the second two it stores the
voltage on a capacitor (IIRC).  It's pretty cool, and a bit of an education
(as with most of Harry's circuits).  Here's the link to all the info:

http://synthdiy.com/files/2008/pv1_611.pdf