This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
This dimmer for incandescent lamps was obtained from an American 1990s documentation. The circuit...
In the figure we have the circuit of an amplifier for alternating signals with 10 times gain,...
This 80's circuit can be used in media recovery. The integrated circuit is of the time, but modern...