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Hi Hank,
Quite annoying for 180° out of phase looked for ...the opamp's output looks full wave rectified!)
The good question might be : what does my OPA do with inputs tied to ground ???
This is generally called " Common mode Input Voltage Range "
RTFDatasheet ... in short terms !
741 ( ! ) or 5532 AOP ???
also remember PIC pin must be OR left floating OR Grounded ....
Alain
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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