The circuit shown indicates voltages from 10 to 14 V used to monitor automotive voltage. One or two LEDs light up depending on the voltage.
This circuit, which can only be used with incandescent lamps, is adapted to the common wall...
This is the simplest configuration of a voltage regulator with a zener diode. The resistor must be...
This circuit was found in an English documentation from 1989. The transistors support...