CAPACITANCE METER


Posted on Feb 5, 2014

U1a is an oscillator and U1b the measurement part of the circuit. It converts unknown capacity into a pulse-width modulated signal the same way an automotive dwell meter works. The meter is linear so the fraction or percentage of time that the output is high is directly proportional to the unknown capacitance (CX in the schematic). Meter M1 reads


CAPACITANCE METER
Click here to download the full size of the above Circuit.

the average voltage of those pulses since its mechanical frequency response is low compared to the oscillator frequency of U1a.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Proteus
    CW 250mW transmitter
    High Voltage power Supply
    Sight n sound metronome
    8W-fworescent-lamp-inverter
    art364 / Standalone Arduino
    microcontroller How can I measure battery voltage with my MCU
    Economical Transistor Radio
    Battery Powered Soldering Iron PCB
    USBStickLogger - USB thumb drive logger for serial data - fischl.de



    Top