Controlling Devices with Relays

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.

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

______________________

Free Dummies Books
Continuous Engineering

Learn:

  • What continuous engineering is
  • How to continuously improve complex product designs
  • How to anticipate and respond to markets and clients
  • How to get the most out of your engineering resources

Get your free book now

Sponsored by IBM

Free Dummies Books
Service Virtualization

Learn to:

  • Define service virtualization
  • Select the most beneficial services to virtualize
  • Improve your traditional approach to testing
  • Deliver higher-quality software faster

Get your free book now

Sponsored by IBM