220v To 12v Power Supply Circuit

Please i am having this issues with transformerless power supply.

220v to 12v power supply circuit.

Capacitor 25v 470uf 3 resistor 470k 1r 1w 4. First power supply circuit is built with bd139 one zener diode and a few passive components. 12v dc regulated voltage supply full wave bridge rectifier. 12v dc power supply schematics.

They works well and protected by regulated voltage supply. Secondly output of this transformer is given to the rectifier circuit which will convert the ac supply into dc supply. Generating low voltage dc from the 220v or 110v ac mains is very useful and necessary in the field of electronics. Low voltage dc like 5v 6v 9v 12v is used in electronics circuits led bulbs toys and many household electronics items generally batteries are used to power them but they need to be replaced time to time which is not cost effective and also takes our time energy.

230v 220v ac to 12 v dc regulated power circuit diagram and 220v 230 ac to 5v dc regulated power circuit diagram using voltage regulator. All electronics devices are operated using dc power supply. 4 1n4007 diodes 12v zenor diode subscribe for more videos. Each of the schematic is very simple to construct and will function without problems if you respect the maximum power supply ratings.

This can be achieved in simple three steps. Capacitor 250v or 400v 155j 2. Each time i intend to use transformerless power supply to power microcontroller 8051 atmega328p and even a dc fan of 12v 1 4a i notice that they never get powered even though the power supply has been tested to produce the required 12v or 5v dc as the case may be.