Circuit - Human Traffic Footstep Detecto - Circuits designed by David A. Johnson, P.E.


	DiscoverCircuits.com, has 27,000+ electronic circuits. The electronic schematics are 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 design ideas to electronic design problems.

HOME

Schematics

Discover Forum

Hobby Corner

Dave's Circuits

Electronic Resources

Book Corner

Contact Info

Discover Solar Energy

Imagineering Ezine

Dave Johnson & Associates

DiscoverCircuits.com -- Hobby Corner
"Hobby Circuits for your Hobby Projects"

Last Updated on: 08/29/2008 02:09:18 PM

Human Traffic Footstep Detector
designed by David A. Johnson, P.E.

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.

PDF Version of Drawing