[sdiy] dsPIC CV input protection

Seb Francis seb at burnit.co.uk
Sat Nov 15 05:18:06 CET 2008

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 :)


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