This circuit was found in a Radio Electronics magazine from November 1972. The circuit is based on an integrated circuit of the time and the current is 1 A and is adjusted with a potentiometer.
With this circuit, a relay can be activated from an alternating signal with frequency up to a few...
With this circuit the visually impaired can easily locate important places inside the house, such...
In the figure we have the way to use the transistors of an old-paired pair as a trigger circuit. The...