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Don't have any of those luxurious security systems? Lack of budget? You can have your own now without spending too much! Just look around your place and gather ...
For the battery, we used battery out of coins and foil ( the one I posted a while ago) and for the reed switch we used Mahmoud Alaa's homemade ...
Solder the parts according to the schematic diagram then put it in the box. Make sure that the parts are properly secured. By the way, we just used ...
As you noticed, the buzzer rings continuously. But if you put a magnet, the ringing sound will stop. To use this, attach a small rope to the magnet ...
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