Transformerless Power Supply 220VAC 12VDC 100mA

 220 VAC 12V DC 100 mA Transformerless Power Supply. Similar articles have been shared before. Transformerless power supplies are generally used for LED lighting. I did load tests on the 50mA-100mA load of the transformerless power supply I mentioned in the PIR sensor LED lamp project and a similar circuit shared on many sites on the internet. Mosfet Electronic Load Circuit LM358 was used for the load. This circuit is very convenient, especially for powering small current absorptions

Diagram of the First Circuit

The classic zener regulator circuit consists of a 1uf capacitor connected in series to the 220VAC mains line, a bridge diode for DC rectification, a filter capacitor resistor and a 12V 1W zener.

Diagram of the Second Circuit

On this circuit, I can say is good, but the safety level is very low due to the lack of the transformer which separates the 220V from the low voltage