Fast Battery Tester


Posted on Aug 21, 2012

Tests 1.5 to 15 Volt cells. This circuit runs a fast battery test without the need of power supply or expensive moving-coil voltmeters. It features two ranges: when SW1 is set as shown in the circuit diagram, the device can test 3V to 15V batteries. When SW1 is switched to the other position, only 1.5V cells can be tested. Two-LED display, no power supply required.


Fast Battery Tester
Click here to download the full size of the above Circuit.

FET Q1 provides a constant current generator biasing LED D1 and Q2 Base. In this manner D1 illuminates at a constant intensity, independent of battery voltage from 3 to 15V and Q2 (when P1 is closed) applies a constant current load of about 120mA to the b




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Low Power Voltage Reference
    Plant-water monitor
    AC motor control
    Diode feedback comparator
    20 & 30 Segment LED Voltmeters
    6V Gel Cell Battery Charger
    Driving a buzzer
    ldr engineer
    Zone Alarm System
    development and evaluation for FPGA based systems
    9700s Analog Synth Modules
    Four flashing lights string circuit 4



    Top