This circuit for incandescent lamps was found in the January 1980 Radio Elecronics magazine. The sensitivity can be controlled by a potentiometer and the microphone used is of the dynamic type.
This circuit came out in a Popular Electronics from December 1995. It is a double T configuration that...
This circuit starts a water pump at a lower level of the reservoir and then turns it off when it...
This relaxation oscillator, simulated in the Multisim Blue, produces two different signals. The...