This circuit turns off when switch S1 is opened. The circuit is from the 1989 Radio Electronics Experimenter edition; The triac must be controlled according to the load.
We found this voltmeter in a 1977 Radio Shack documentation. The integrated circuit can be the...
This circuit with a maximum current of 50 mA was found in the August 1998 issue of Electronics Now magazine....
This circuit was found in the July 1994 issue of Electronics Now magazine. The relay can be rated...