We found this circuit in the March 1984 issue of Radio Electronics magazine. The module used is a common type at the time. The other integrated circuits are common types.
This circuit is from an Italian magazine Elettronica 2000 of September 1987. It is a pulsator for...
This voice-actuated bistable relay or sonic switch was found in English documentation. The circuit...
This circuit activates a relay when the sensor receives light indicating dawn. A relay with a 4k7...