Transformerless 220VAC to 12VDC 30mA Power supply

Post date: Dec 18, 2015 1:42:52 AM

For future projects i want to make cheap and easy transformerless 12VDC power supply from the main 220 AC power line.

Just to drive a LED or very low power circuit. around 30ma to 40 ma should be enough.

Researching and lab trying i came out with the following schematic:

Components:

• Capacitor 474KF 250V x1

• Resistor 820K ‎Ω 1/4W x1

• Diode 1N4001 or equivalent x4

• Capacitor 10μf 25V x1

It's not regulated and probably still dirty output but easy to make, cheap and enough to drive a LED.