7 2V Battery Replacement Power Supply For Camcorders


Posted on Feb 6, 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

    Programmable-active-filters
    Precision-audio-waveform-generator
    6 Digit Coded Ac Power Switch Circuit
    ATmega8535 Line Follower Robot
    Two-Zone Burglar Alarm
    CMOS Integrated Switched-Mode Transmitters for Wireless Communication
    Woodstock HP-21 HP-25
    Medical ultrasonic atomizer 2
    RF MODULATOR
    COMPLETE 2 W SERVO AMPLIFIER
    AC power without power transistor switching circuit
    Stepping CS6061A touch dimmer light circuit



    Top