This circuit supplies a voltage of 42 V, plus a symmetrical voltage of 12 V with 1 A. The voltage regulators must be mounted on heat sinks. The transformer is 35 + 35 V with 3 A.
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...