Electronic Circuits and Tutorials
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Electronics Schematics - S
Seismic Monitors,
Geophones
Sensors
and Detectors
Optoelectronic Horizontal VBB Seismometer (Figures):
Seismic Detector: The piezoelectric element of a kitchen gas lighter is used in this simple, yet effective seismic detector.
Low Cost Feedback Circuit Boosts Efficiency: 01/21/99 EDN-Design Ideas / PDF contains multiple circuits - scroll to find this circuit