Hey i was building an Arduino, after finishing it I decided to upgrade and try the 'Buffered Voltage Bias circuit'. I have limited knowledge of op amps so i asked for advice on a like which op amp to use, then I was advised to try an LM358P, but im getting readings of over 400V from the circuit. Does anyone know if the op amp i have can be used with an altered circuit (in which case, what do i need to change?) or have i been wrongly advised that this op-amp can be used? Any guidance would be greatly appreciated.
To be more detailed, I made the circuit up on my breadboard replicating the one described in this site. (i used a 1uf capacitor and 20k resistors for R3 and R4). I am running the circuit on 5V. I adjusted the pin numbers for the different op-amp using only one channel. The output is stable, and reading over 400v ( i've tried the circuit twice in very short runs from fear of damaging something, one first attempt and then a re-try when id checked everything again, i should have recorded the actual figure i think 418.something Volts). Does this give any further clues as to what's going wrong?
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