[sdiy] dsPIC CV input protection

[Seb Francis]

Ian Fritz wrote:
> Another approach to consider: amplify your CV so its full range just 
> saturates an opamp.  Then get to 3.3 with a voltage divider.  For my 
> SoS wind controller I used LM324 opamps powered at 6.4 V to get a 0-5V 
> swing, which went directly to PIC inputs.
>

Yes, this would work.  Or run a rail-to-rail opamp off the 3.3V supply 
as someone else suggested offlist

That's why I love this list, not just one solution to every problem :)

Seb