This circuit was obtained from the October 1977 Radio Electronics magazine. The meter is analog, and the maximum selected power is 100W.
This circuit was obtained in a manual from the 1977 chain store Radio Shack. The circuit...
This circuit intermittently activates a relay. It was obtained in a 1980 publication. In fact, we...
This circuit was obtained in an American publication from 1977. The circuit operates in the audio...