Arduino Seismic Activity Monitor


Posted on Feb 6, 2014

So to reduce the resonant frequency and get some useful signals, I took some washers slapped them on a bolt and some nuts and experimented. I used aOscilloscopewith FFT and changed the weight on the tip of the film until frequencies of around 40Hz were the largest. If you don`t own anoscilloscope, just add a little weight and then hit the sensor. It


Arduino Seismic Activity Monitor
Click here to download the full size of the above Circuit.

should flop around for about half a second to a second before coming to rest. As you can see from the picture, I taped down the base of the sensor. This is because the leads on the piezo film is flat, and tends to be loose inside the breadboard, so any vibrations tend to get lost in the movement of the leads. A Charge Amp takes the chargeacrossa capacitor and translates it into a voltage. If you know your electronics you can see that it is essentially an integrator, which prevents the charge across the Piezo film, which acts like a capacitor, from discharging quickly.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    portable FM transmitter
    ISP Programming Kit for AT89S52 and AVR series Microcontroller
    compressor
    audio surround decoder circuit diagram
    audio visual indicator for telephone circuit diagram
    Fast Voltage-Driven Current Source
    fm radio receivers
    Novice CW Transmitter
    Wien Bridge Oscillator Design
    Compound excited DC motor reversing circuit



    Top