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Controlling Devices with Relays

Issue 117

From Issue #117
January 2004

Jan 01, 2004  By Jason Ellison
 in
Ring bells and more with a simple C program and inexpensive hardware.
Further Possibilities

This was a simple exercise that illustrated the use of controlling devices using a relay over a serial interface. The low-cost relay used in this example is capable of controlling any number of electrical devices. Also available are relay boards that can be expanded to up to 128 relays per serial port, not to mention analog and digital input cards.

Resources

Electronic Energy Control, Inc.: www.eeci.com

Red Hat: www.redhat.com

UPS HOWTO: www.tldp.org/HOWTO/UPS-HOWTO.html

Usermin and Webmin: www.usermin.com and www.webmin.com

Jason Ellison is from Fairhope, Alabama, and currently is a network analyst for Delphi. He also maintains several Linux and AIX systems at Delphi.

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