6.8 Volt Transformerless Power Supply.

6.8 Volt Transformerless Power Supply.
Quite a simple power supply unit can be built for half an hour. The scheme is designed for voltage and current of 6.8 V 300mA. The voltage can be changed by replacing the Zener D4 and, if necessary, D3. A setting on the radiators of transistors can be increased and the load current. Diode bridge - any, is nice and a reverse voltage of at least 400 volts. By the way, we can recall the ancient and diode D226B,