Peak detector is used to detect the peak of signal .output of this circuit will follow the peak value of the input signal and remain at that level untill a higher input is applied.
Here I have used two input voltage,one with peak voltage of 2v so initially when you open the switch across capacitor the output will be at 2v and when you switch the supply to 5v it will then follow the input to it's max.
If you want to detect higher voltage level then change the supply voltage of 2nd supply manually.
Operation-
Open switch across capacitor it will detect the first peak which is 2V.
Then switch the supply to 5V and it will now detect the higher peak. And if you want to detect higher value manually change the supply volatge 2.
Close switch across capacitor to perform reset then toggle the switch to lower voltage supply and repeat above process.
*When you change the direction of both diode it will act as negative peak detector.
