Found in an old English publication, this circuit applies to the 240 V network, but can be changed to lower voltages. Transistors are mostly general-purpose, admitting modern equivalents.
This micro FM transmitter uses a tunnel diode as an oscillator. I found it in an English...
This charger was found in the February 1978 issue of Radio Electronics magazine. The circuit is...
We found this circuit in the November 1992 issue of Radio Electronics magazine. The circuit has...