Home-made motion detector alarms - Techist - Tech Forum

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Old 09-10-2004, 07:38 AM   #1 (permalink)
Newb Techie
Join Date: Sep 2004
Posts: 20
Question Home-made motion detector alarms


does any1 no how 2 make motion alarms? ive lukd all ova da internet nd i havnt found a thing. nd those things in da shops are expensive nd bulky

any1 no?

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Old 09-10-2004, 07:44 AM   #2 (permalink)
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Join Date: Jul 2004
Posts: 178

you could try a couple of proximity sensors, hook them to your door, put in an inverter thingy... NOT gate i think that is and if the signal breaks the alarm will go off, could also try that magnetically, but there are loads of electronic shops that sell motion sensors, i think you also need some kind of heat sensor as you dont want your alarm going off if something rolls off a shelf or summit like that only when a person moves
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