With the configuration shown in the figure, we have the relay being activated when the microphone picks up a sound and shutdown when the X1 reset sensor is activated.
This TTL circuit found in the September 1996 issue of Electronics Now magazine doubles the...
This key is turned off by a touch sensor. The time it remains active depends on capacitor Cx. The...
This circuit is from a 1967 publication and applies to incandescent lamps up to 600 W. Triacs must be...