With a nokia old cellphone (with keyboard), a 220v relay with NO contact, and a motion detector, let's see how to make a home alarm with motion sensor and let you know when the phone is triggered.
Here is an outline of the connections: goo.gl/9SpMPa
Requires a model of telephone to which there is relative access to the keyboard board, since it is necessary to weld two cables to the board.
This alarm design with sensor works perfectly, and the cost is relatively low, since you have to put a sim card to the phone that is installed and pay your monthly fee.
Do not let thieves enter where they should not! Now you have it easier than ever with this alarm design that calls you on the phone and you can listen in real time what happens at your address.
We hope it helps you!!
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Негізгі бет Ғылым және технология Home Alarm with Motion Sensor and Telephone Announcement
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