4n35
:confused:
There should not be any problem with 4N35...It is ordinary optocoupler, nothing else...
Pin 6 should stay not connected...
If op-amp is o.k. it should supply proper signal through resistor to 4N35 input...
But you have to be sure that proper power supply is applied, pay attention:
4N35 need 9V not 4.5 for p.s.
I didnt have any problem with it from the start...
Check again whole....must be some mistake...
regards
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