Category: Main page » Science

Seismic detector

 

Seismic detector

The piezoelectric element of a kitchen gas lighter is used in this simple, yet effective seismic detector. The piezo element must be placed vertically, one end solidly to ground. A 2-3 pound weight of fine gravel in a loose package should be placed on top at the other end. The high voltage lead goes to the IC, placed close to the piezo element. The whole box is acoustically and electromagnetically screened. A 3 core shielded cable brings the signal to the rest of the circuit and to the power supply (+/- 15V). The SB140 diodes are Schottky type and pin 8 (substrate) of the IC should be connected to ground.


This page no comment. You can be the first.

Your name:
Your Email:

Comment:
Type the characters: *
captcha
Refresh

Buy Books at Lowest Price in India ; sic ceramics