hello friends today i am showing how to make simple (12v 30ma) power supply. It costs less to make and it is very easy to make
The biggest advantage of this circuit is that small work can avoid big transformers.
note :- do not touch any part in this circuit.
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required :-
1. 100 ohm 1 watt resistor
2. 2 12v Zener diode 1 watt
3. 2 1N4007 diode
4. 474k 400v capacitor
5. 100uf 25v capacitor
6. led
7. 1k resistor
8. zero pcb board
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