Recommended for automotive applications, this circuit was found in an April 1982 Radio Electronics magazine. The transistor supports equivalents. Sensitivity adjustment is made by R1.
We can use high value electrolytic capacitors in alternating current circuits with the...
Using only one integrated circuit this control was found in an 80's Electronic Engineering. The circuit...
This source of constant current was obtained in an American documentation of 1973. The transistors can be...