Voltage Sensing

[EMIRGIN]

Hello everone

I measure 24-12v from MCU.I have a circuit there is a cap and 5 v zener paralell to out of circuit.However, The output of the circuit is very variable.I choose 100n cap.What should I change to fix this problem? İs there any cap callculation this type circuit or Am ı added filter(what kind of)

[bob91343]

I read your message several times and was unable to understand it.  Be more careful about your grammar and please attach a diagram of what you are working with.