Re: How to set up a proximity circuit using photodiodes

Greetings:

I would suggest that you build an infrared motion detector kit. These kits sense
infrared rays generated by the heat radiated from human bodies and can operate up
to distances of 5 meters (5 yards). One kit can be found on the Web at:

http://www.elexp.com/kit_2kmd.htm< /a>

The following is copied from the web site:
_________________________________________________________
AMERIKIT
Motion Detector Kit

INTERMEDIATE KIT: Some previous knowledge of electronics.
Good soldering techniques for medium dense boards.
Compact and portable. Adds safety to your home or office.
Learn the basics of motion detector technology.
Uses a pyroelectric infrared sensor.
Simple and fun to build.
Battery operated.
Complete with all parts, PC board, case, schematic, and extensive training manual.
Part No. Price
---------------------
N32KMD $16.50
___________________________________________________________

Similar devices can also be found in the Radio Shack Catalog at:

http://www.radioshack.com

Best regards, Your Mad Scientist
Adrian Popa