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.
In the figure we have an interesting protection bridge against power polarity inversion of a...
This amplifier was found in an old publication of 1990. With the changes, it may still be...
Obtained from an English publication, this circuit actually needs a current limiting resistor,...