Posted on Oct 6, 2012

A monolithic 555-type timer is the heart of this simple automobile voltage regulator. When the timer is off so that its output at pin 3 is low, the power Darlington transistor pair is off. If battery voltage becomes too low, less than 14.4 V in this case, the timer turns on and the Darlington pair conducts. Can be any general purpose Silicon diode or 1 N4157 device.

Click here to download the full size of the above Circuit.

Can be any_general purpose Silicon transistor.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    30 LED audio frequency analyzer
    Battery charger with LM317
    Direction and speed control for series-wound motors
    Low Cost Water Pump Controller Circuit
    video distibution amplifier with five
    Light Detector
    RS-232 Laser Transceiver
    Simple GPS Disciplined Reference
    Force Sensitive Resistor Round 0.5 Retail
    50W Tube-Valve SW transmitter