Transformer less power supply

Transformer less power supply

Transformer less power supply

In this video i am going to show you how to make a transformer less power supply of 5v/ 6v 9v/12v


Circuit is simple, we are using a Voltage dropping capacitor of 225j is connected in series with Phase line of AC, this is a non-polarized capacitors so it can be connected from any side. A 1M ohm resistor is connected in parallel of Capacitor, to discharge the stored current in the capacitor when circuit is switched off, thus preventing from electric shock. This resistance is called Bleeder resistance.

after the Capacitor we will get low volt AC approx 22v ac that is further converted into DC using a bridge rectifier of diode IN 1007 x4

the rectified DC is further Filtered and stored using 470mf capeciter and a final touch is given by using a zener diode,

the zener diode used in this tutorial is of 12v if we need to make 5v power supply then we have to use 5v Zenner diode.

(The Zenner diode  is always connected in reverse biased)


List of components:

List of Components

Capacitor 225J 400 V       x              1

Capacitor 470 mf 25 V     x              1

Resistor 1 M 1 Watt         x              1

Resistor 100 Ohm 2 W    x              1

Resistor 10 K ¼ Whatt    x              1

Diode IN4007                  x              4

LED Red                          x              1

LED Strip 12 Volt             x              1

Circuit Diagram

Manmohan Pal
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