high voltage ground Isolation

[rangabanadara]

I planned constant power load control circuit. All parts are fully operational in computer simulation. But I want to Isolate High voltage (180V DC ) DC ground (GND 2) and low voltage (12V/3.3V DC) DC Ground (Gnd) What can be done for this? How to solve this problem?

Circuit Diagram

 

[HarryA1]

I used an optocoupler between an Arduino Uno and a mosfet at 350 volts for an capacitor discharge ignition circuit.

 

[ivan234]

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