cheap frequency counter

Posted on Feb 7, 2014

This frequency counter uses your existing digital multimeter as the display unit that is why it can be constructed at very low cost. Due to the high impedance of most DMMs, a frequency to voltage converter can be easily connected to it without matching problems. The converter shown in the diagram has a frequency range of 10 Hz up to 1 kHz (positio

cheap frequency counter
Click here to download the full size of the above Circuit.

n A) and 1 kHz up to 100 kHz (position B). The sensitivity at low frequencies 10 Hz up to 1 kHz is around 35 mVpp and increases to 350 mVpp at a frequency of 100 kHz. The DVM you are going to use must be connected to the plus and minus terminals of the converter`s output. The conversion in A range is 1 kHz= 1V and in B range is 100 kHz= 1V.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    845 20W A1 class monotriode amplifier
    Pushpull Amp
    70W Stereo Audio Amplifier Circuit based STA550
    Adopt DC/DC converter of PWM technical control
    Amp Circlotron
    mp3 mode circuit wtv020sd 16p tutoria
    Car Amplifier Circuit Schematic using TDA2040 Integrated Audio Amplifier
    Infrared detector circuit using PID20
    Network RJ45 Cable Tester Circuit
    Musical Doorbell Circuit
    Global Positioning System GPS
    ECM Mic Preamplifier
    A hi-fi amp around 01