This circuit is a modification of the previous one, also found in the July 1995 Electronics Now magazine. The triac must be according to the controlled power.
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...