12v input voltage is 22 volt a converter dc-dc converter circuit power 5 amps Drive solid IR2184, NE555 integration with the output made 2 mosfet BUZ11 2 Fast diode MBR1645 (16 amps 45 volts)
Mosfets and diodes can be supplied from computer power supply circuits. Most atx power supplies are used for 5 volts output.