SubscribePower supply without transformer with triac
A power supply without transformer can be made using electronic diagram below. This allows to power a device that requires a voltage of 12 volts, without using a transformer . Using this power supply can be powered a consumer requiring a maximum current of 10 mA.
Circuit is powered from the mains voltage 220 volts. Zener diode connected in emitter transistor is 11 volts Bc109. Triac used must withstand 150V/150mA.
Circuit Diagram:
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