Found in the July 1980 Radio Electronics magazine, this circuit uses an integrated circuit from the time and a power Darlington. The Darlington must be equipped with a heat sink.
This circuit can linearly control the temperature of showers, taps or heaters up to 2 500 W. The...
This simple radio with 1 germanium transistor was found in a Japanese documentation from 1967. The coil...
We found this circuit on an Elektor from the 90s. The frequency is given by capacitor C1. The...