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.
This circuit was found in an American publication from the 50's. The transistors are made of...
The circuit shown is an amplifier for medium impedance headphones including bass and treble...
This circuit for an optical audio link using LED or LASER was found in a 90s QST magazine. The circuit...