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Seismic Monitors, Geophones -
Sensors and Detectors

Deer Repellent #1: seismic sensor

Deer Repellent #2: Here is a simple sensor, which can detect the seismic vibrations caused by a person or large animal walking nearby. A representative application for the sensor is a deer repellent for the vegetable garden. When a deer steps near the sensor a loud buzzer or beeper sounds for a few seconds startling the would-be vegetable thief away.

Feedback Circuit:

Low Cost Feedback Circuit Boosts Efficiency: 01/21/99 EDN-Design Ideas  / PDF contains multiple circuits.

Low Cost Seismometer:

Optoelectronic Horizontal VBB Seismometer (Figures):

Seismic Detector: The piezoelectric element of a kitchen gas lighter is used in this simple, yet effective seismic detector

Shackle ford Gunderson Seismometer Sensor Electronics


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