This circuit was found in a 1971s English magazine. We can still assemble it using BC548 transistor. The other components are common. The supply voltage of 6 or 12 V depends only on the relay.
The circuit of this power supply was obtained in an American publication of 1982. We changed some...
Found in the June 1962 Radio Electronics magazine, this circuit uses 4 transistors. The range...
January 2017 - Mouser Electgronics has in its inventory the new CoolMOS transistors from Infineon to...