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 microphone preamp allows the use of high impedance crystal microphones with amplifiers that have...
This is the radio receiver for the previous infrared alarm radio transmitter. It contains the...
This amplifier for a sinusoidal function generator uses a 741 integrated circuit. The circuit is...