7.2V Battery Replacement Power Supply For Camcorders


Posted on Feb 4, 2014

This circuit lets an external 12V SLA battery power a camcorder which normally has an inbuilt 7. 2V battery. Such batteries can now be very difficult or expensive to obtain for earlier model camcorders. In essence, the circuit is a standard LM317 adjustable regulator with resistors R1 & R2 set to provide 7. 2V (depending on the accuracy of the 1. 25V


7.2V Battery Replacement Power Supply For Camcorders
Click here to download the full size of the above Circuit.

internal reference). If the resulting output voltage is low, it can be increased by reducing the 130 resistor and vice versa. The circuit can be assembled on to the Eliminator PC board or the simple DC power supply PC board. The regulator should be fitted with a flag heatsink. Note that the circuit should be disconnected from the battery when not in use, otherwise its quiescent current (from the LED and regulator) will flatten the SLA battery.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Signal Tracer
    7-segment display with encoder
    Precision current sink
    Audio-circuit-bridge
    Fast Binary Adding Circuits
    15W FM RF Amplifier with 2SC2539
    schematics electronic telephone ringer
    BarGraph Ccts
    Site news archive - PCB Heaven
    The L296 chip high current switching power supply chips for power supply
    Proximity switch integrated circuit composed of the magnetic field sensor HMC1001



    Top