In the figure we have the configuration of series regulator protector suggested by Motorola in 1968 documentation. The transistors are of the time, being able to be used modern equivalents.
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...