LED Voltmeter


Posted on Aug 21, 2012

This is a low power voltmeter circuit that can be used with alternative energy systems that run on 12 and 24 volt batteries. The voltmeter is an expanded scale type that indicates small voltage steps over the 10 to 16 volt range for 12 volt batteries and over the 22 to 32 volt range for 24 volt batteries. Power consumption can be as low as 14mw when operated from 12V and 160mw when operated from 24V.


LED Voltmeter
Click here to download the full size of the above Circuit.

It is possible to set the meter to read equal steps across a variety of upper and lower voltages. The meter saves power by operating in a low duty-cycle blinking mode where the LED indicators are only on and consuming power briefly during a repeating 2 se




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Programmable Code Lock circuit
    Phantom Wah for guitarists
    Tone ringer II
    Sound-level-meter
    Line-activated-solid-state-switch
    Transistor Checker Circuit
    Gibson Clavioline Keyboard Instrument (1953)
    DDR Memory Power Supply: 5V to 28Vin 1.5V@ /-10A Vtt (3V external reference)
    Nescaf mod



    Top