battery charger circuit


Posted on Feb 7, 2014

This handy circuit can be used to charge from one to 12 NiCd cells from a car battery. Up to six cells can be charged with switch S1 in the `normal` position. The LM317regulator operates as a simple current source, providing about 530mA when R1 = 2. 35O (two 4. 7O resistors in parallel). For more than six cells, S1 is set to the `boost` position. Th


battery charger circuit
Click here to download the full size of the above Circuit.

is applies powers to IC1, a 10W (or 20W) audio power amplifier. Positive feedback from its output (pin 4) to non-inverting input (pin 1) causes IC1 to act as a square wave oscillator. This square wave signal is coupled to the junction of Schottky diodes D1 and D2 via a 330 µF capacitor, forming a conventional charge-pump voltage doubler. Over 20V (unloaded) appears at the input to REG1 - enough to charge a maximum of 12 cells!




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Ultrasonic range finder circuit
    MICROCONTROLLER BASED AUTOMATIC ROOM LIGHT CONTROLLER
    light weight data capture and signal generator
    piano
    tx atv
    The LED car voltmeter (3)
    Fans can light three-gear speed control circuit



    Top