This dimmer for incandescent lamps was obtained from an American 1990s documentation. The circuit accepts triac-like loads that can be virtually any type. Triac must be fitted with a heat sink.
The operational amplifier used in this circuit is uncommon today, but the configuration can be...
This power stage with two transistors was found in Radio Electronics magazine from October 1963....
Suitable for operation with high impedance microphones, this circuit was found in American...