Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com, has 26,000+ electronic circuits or schematics carefully
cross-referenced into 500+ categories.   As a vital resource for engineers,
hobbyists, inventors & consultants, the site's collection of information
will help you find quick solutions to electronic design problems.

Web www.discovercircuits.com

HOME Schematics Discover Forum Hobby Corner Dave's Circuits Electronic Resources Our Book Corner Contact Info

Sensors / Detectors: Seismic Monitors, Geophones Circuits
Designed by David A. Johnson, P.E.

Last Updated on: Monday, April 21, 2008 04:19 AM

Master Category List - Dave's Circuits
 

  • Home Made Geophone Detects Foot Stomp
    A home made geophone is made from a strong magnet, a coil of wire and a rubber band. The circuit is sensitive enough to detect the vibrations of a nearby foot stomp.  It could be used as an earthquake detector.  (added 7/06)

  • Human Traffic Footstep Detector
    This circuit uses a surplus geophone to detect human footsteps from 100 feet away.  It was designed for monitoring the Mexico/USA border.  This preamp part of the system draws about 50 microamps from a 12 volt supply.      (added 12/04)
  • Human Traffic Footstep Alarm
    This circuit processes the amplified signals from the footstep detector circuit and activates a microprocessor when the circuit detects footsteps.  At has an adjustable sensitivity.      (added 12/04)


More Sensors / Detectors: Seismic Monitors, Geophones Circuits

Master Category List - Dave's Circuits
 

Copyright  2002 - 2008 David A. Johnson & Associates.  All Rights Reserved to the contents & graphics of Discovercircuits.com
Linking is welcomed but COPYING any content or graphics to your server is expressly prohibited.