digital voltmeter circuit

Posted on Feb 6, 2014

This is a design circuit for digital voltmeter circuit. The integrated circuit ICL7107 is a 3-1/2 digit LED A/D convertor. It contains an internal voltage reference, high isolation analog switches, sequential control logic, and the display drivers. The auto-zero adjustment mechanism ensures zero reading for 0 volts input. The circuit is classic de

digital voltmeter circuit
Click here to download the full size of the above Circuit.

sign and you can be sure that it will work fine. However, for better result, it is recommended to design a proper PCB for minimum voltage drift and noise. This is the figure of the circuit; Connect the positive and negative probes PLG1 and PLG2 to two points of the electric circuit you would like to know their electric potential difference or simply voltage. You have to set the selector switch S2 to proper voltage range you expect those two points would have. To calibrate the volt-meter, use the potentiometer P1. Adjust it to read correct voltage on the display by connecting probes to a known voltage source. You may need to use another calibrated volt-meter in this case.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    Touch Switch with 555
    Off-line Telephone indicator
    Micropower Voltage Regulator Schematic Diagram
    4-20mA simulation circuit for PLC
    Maximum Load Capacitor that LMV116 can drive
    Microcontroller Voltmeter / Ammeter with LCD
    electric output stator
    SN75064 ~ SN75067 current Darlington circuit diagram of a switch