Differential capacitance measurement


Posted on Sep 16, 2012

A bubble vial with external aluminum-foil electrodes is the sensing element for a simple indicating tiltmeter. To measure bubble displacement, a bridge circuit detects the difference in capacitance between the two sensing electrodes and the reference electrode. Using this circuit, a tiltmeter level vial with 2 mm deflection for 5 arc-seconds of tilt easily resolves 0.05 arc-second.


Differential capacitance measurement
Click here to download the full size of the above Circuit.

The four diodes are CA3039, or equivalent.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Miniature Black and White TV System
    ATMEL 89 Series Flash Microcontroller
    Polarity converter
    Low-noise broadband amplifier
    Flash Signal Alarm Circuit
    A Mini Payphone Controller in order to use coins in three slot pay telephones
    A complete Inverter project
    transistors IR Emitter/Detector with 555 timer alarm
    Generator circuit
    Polarity Reverser
    Wien Bridge Oscillator
    Pro Co Rat Input & Output Buffers Guitar



    Top