These are 12V DC power supply circuit which designed without transformer (trafo). These circuit use capacitive reactance instead of resistance; and it doesn’t generate […]

This is another Transformerless power supply.  IC voltage regulators for SR03x made ​​by Supertex is connect directly to main voltage and get the output […]

Is often required to supply electricity to the consumer low voltage 220V.  You can use an external adapter – but it’s bad, and to reduce the size of the device requires a power supply located in the device.

The circuit shows a diagram of a simple transformerless power supply for transistor BUZ41A. Through the inclusion of the common-drain transistor VT1 NW capacitor […]