UNIVERSAL BATTERY CHARGER


Posted on Feb 5, 2014

When power is applied to the circuit, SCR1 is off, so there is no bias-current path to ground; thus, LM317 acts as a current regulator. The LM317 is connected to the battery through steering diode D1, limiting resistor R1, and bias resistor R2. The steering diode prevents the battery from discharging through the LED and the SCR when power is remov


UNIVERSAL BATTERY CHARGER
Click here to download the full size of the above Circuit.

ed from the circuit. As the battery charges, the voltage across trip-point potentiometer R5 rises, and at some point, turns on the SCR. Then, current from the regulator can flow to ground, so the regulator now functions in the voltage mode. When the SCR turns on, it also provides LED1 with a path to ground through R3. So, when LED1 is on, the circuit is in the voltage-regulating mode; when LED1 is off, the circuit is in the current-regulating mode.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    1,5-15V 500mA Power Supply
    Dew sensor circuit
    CMOS Toggle Flip Flop Switch
    Butler aperiodic oscillator
    Electrolytic Capacitor Reforming Circuit
    Pure Sine-Wave Generator Circuit
    High And Low Voltage Cut Off With Time Delay
    ZMDIZSSC1856 double-channel intellectual battery manages the solution
    control circuit for nokia tv tuner 5827
    EMEM2 and EMEM3D frequency device construction and operation
    Q-multiplier filter circuit
    Build Your Own Motorcycle Alarm
    Having a broadband 50MHz-3dB 20dB compression characteristics of broadband amplifier ALC



    Top