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Step 4Preparing the magnetic alarm...
In this step you'll just solder two wires to the two terminals of the magnetic switch inside.
and drill two holes for the two wires
the batteries in the alarm aren't necessary at all unless you want to keep the noisy alarm
NOTE : you have to test your alarm first, you may not need a relay at all test the magnetic switch with the multimeter to know whether it is NC or NO.
and drill two holes for the two wires
the batteries in the alarm aren't necessary at all unless you want to keep the noisy alarm
NOTE : you have to test your alarm first, you may not need a relay at all test the magnetic switch with the multimeter to know whether it is NC or NO.
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Sep 17, 2009. 1:54 AMwjames
says:
how will you know if the magnetic switch is NC or NO using an analogue multimeter??
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Sep 17, 2009. 2:12 AMPanadoL (author)
says:
This is very simple : switch the multimeter to ohm mode , then check the switch " without putting the magnet " , if NC your multimeter will read near 0 ohms,"the needle will move to the other direction" if NO it'll read infinity that means the needle won't move ! cheers : )
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Sep 11, 2009. 10:04 AMmyke2020
says:
idea: you can buy a 12v relay on ebay, that has key chain remotes, add one in and you can arm and disarm your alarm, just like a car.
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