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Circuit Cellar Online
THE MAGAZINE FOR COMPUTER APPLICATIONS
Circuit Cellar Online offers articles illustrating creative solutions
and unique applications through complete projects, practical
tutorials, and useful design techniques.

A REMOTE ALARM REPORTING SYSTEM

by Tom Petruzzellis

Start ý Under the Hood ý Building Tele-Alert ý Putting It To Work ý Customizing Your Tele-Alert System ý Sources and PDF

CUSTOMIZING YOUR TELE-ALERT SYSTEM

The Tele-Alert system can be used in a number of different alarm configurations such as monitoring safes, doors, windows, floor mats, computers, movement, temperature and voltage changes, as well as smoke and fire sensors. The system can even monitor existing local alarms by using the Tele-Alert as a multichannel dialer. With the motion module you can protect a vacation house or cabin using the existing phone line. You can even monitor an overheating computer or UPS failure. With a little imagination, you can implement the system in almost any alarm configuration from multizoned alarm systems to simple multievent annunciator. The Tele-Alert can even drive a siren or flashing outdoor lights to create a local alarm if desired.

Figure 2 illustrates optional local alarm connections. Relay 1 can be used to drive small loads such as an electronic Sonalert or, with the addition of Relay 2, you can drive larger loads such as motor sirens or flashing outdoor lamps. You can drive two external loads from OT-1 and OT-2. Output OT-3 is left for future expansion, which could include X-10 appliance activation.

Figure 2ýThe Tele-Alert can be configured to handle many different alarm output needs based on your specific application.

 

With the Tele-Alert system, you can be notified of an alarm condition anytime and anyplace. The Tele-Alert can dial multiple phone numbers or repeatedly dial the same number as desired. If a second party is notified, the condition can be verified and the police could be called depending upon the severity of the alarm condition. Rover may bark at things that go bump in the dark, but even with the best obedience school training, he wonýt be able to call your cell phone or pager to tell you whatýs going on. Build a Tele-Alert system and youýll get a full time personal sentinel, not to mention, some peace of mind.

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Circuit Cellar provides up-to-date information for engineers. Visit www.circuitcellar.com for more information and additional articles.
For subscription information, call (860) 875-2199, subscribe@circuitcellar.com or subscribe online. ýCircuit Cellar, the Magazine for Computer Applications. Posted with permission.

 

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