Quantity   Component name
1 × smoothly adjustable low voltage power supply for threshold voltage testing; I used Li-ion cell + pot
1 × smoothly adjustable medium voltage floating power supply should go up to 50 volts. Current required is extremely low.
1 × relay Power Supplies / Uninterruptible Power Supplies (UPS)
1 × signal generator Arduino will do
1 × MOSFET to convert/sacrifice
1 × power LED
1 × high current low voltage power supply for powering mosfet drain circuit
1 × luck!