With this circuit it is possible to vary the resistance by adjusting the mark/space reaction of the 555. The circuit was found in the November 1989 Radio Electronics magazine.
We found this circuit in an old documentation, using an operational of the time. The circuit...
This circuit is from a 1967 publication and applies to incandescent lamps up to 600 W. Triacs must be...
The TL431 integrated circuit consists of a programmable shunt regulator with an internal...