switching regulator test circuit (based on LM317)

  test circuit for switching power supply. Not using a ready-made IC! It is based on PNP transistor, and coil from a CFL. Efficiency is not so good but not too bad, the transistor does not heat up, dumping 6 volts into 22 Ohms, from 20 Volts. The circuit makes some noise! And it is not the latest technology…actually based … Continue reading