This circuit was found in an Elektor from the 90s. The circuit uses common components even today, requiring a symmetrical power supply.
This 600 W reducer uses SCRs and a switching system. The circuit is from Motorola's 1975...
In the figure we show how to use common diodes to get a reference near 3 V in a car gearbox. The...
This circuit using the newly released HA2400 was found in the March 1980 Radio Electronics...