[sdiy] 3 bit A to D with hysteresis?

[Louis van Dompselaar]

It's ancient (almost) and hand-drawn, but take
a look at page 4 of this: http://www.tyzack.nl/docprj/vsdschema.pdf
There's a simple 3-bit A/D at the bottom that we used in a
video digitizer, long ago.  No hysteresis though but the idea might
be useful.


> Is there an elegant way to make a simple & cheap
> 3 bit A to D  with hysteresis?
> I'm hoping to have a footpedal give a control voltage
> that drives a 3 bit output counter, but wiht hysteresis so 
> there is no problem of being stuck on the edge &
> stuttering.
> Maybe there is an 'obvious' solution applicable to all
> A to D converters?
> (yeah, I know...... use a micro...... but before I do....)
> 
> paul perry melbourne australia
>