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

    Efficient Power Booster
    Motorcycle and Car Battery Tester Circuit
    RF circuits
    pierce xtal oscillator circuit
    PT7M6101 Ultra Low Voltage Detectors
    HIP6302 Microprocessor CORE Voltage Regulator Multiphase Buck PWM Controller
    Tilt Alarm Circuit
    Quick Counter For Young Children
    Simple quality-oriented PA 02



    Top