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

    Current Booster
    Strobe Light circuit
    noise LM386 audio amplifier not amplifying
    ic lm2917 frequency to voltage
    4 order filter with a single IC project PCB
    DC Voltage Regulator Circuit
    Flyback Transformer Driver
    HOLTEK 9200B & 9170B DTMF Generator & Receiver
    Discrete PWM Generator Circuit
    XenonS130 Reference
    Bipolar stepper motor driver circuit diagram
    Brushless DC motor control circuit
    LES produced using blackout emergency lighting