This circuit was obtained from a 1967 GE SCR manual. It is intended for controlling relays responding to a decrease or increase in temperature.
This charger for a maximum current of 15 A was obtained from an American 80's schematics. The triac must...
This simple photometer uses a 1 mA milliammeter and a common phototransistor. The circuit has its...
Indicated for stereophonic sound applications, this circuit was found in the April 1983 issue of...