This variable oscillator with power step for alarms was found in an American documentation from the 90's. The power transistor must be equipped with a heat sink.
This circuit was found in the used integrated circuit manufacturer's manual. The table beside the...
This circuit can control the power from 0 to 70% of the maximum power on a load. The circuit was...
This circuit for incandescent lamps is from a publication from the 70s, but it can be assembled with...