This power control circuit was found in an article in the June 1995 Electronis Now magazine. The circuit makes use of a trigger transformer.
The circuit presented is a simple MW tuner that can be plugged into the input of any audio...
Found in Radio Electronics from the 90s, this thermometer uses an integrated circuit that is...
The presented circuit can be implemented with a BC548 and for larger currents a BD135 can be used....