Phone call alert box
A simple alarm/alert box that calls you whenever somebody moves the wire.
you can connect to this box many other sensors like: 220v electricity shortage, high/low shortage temperature sensor, Doppler effect movement sensor, mercury switch and more (depends on the order).
What is it good for?
If you are away from home or office and you want to know if somebody opens the door (of the closet, the warehouse) - put a wire sensor - once the wire is moved, its contacts are closed and the GSM (G2) modem will place a call to your cellular phone, now you can either drive to the location, call your neighbors or open the cameras to see what is happening.
You can put the wire sensor at your garden to know if somebody breached the fence and more.
A phone call will wake you up at the middle of the night and the system is reliable wherever there is cellular network available, this is better than getting an SMS message which might not get your attention.
It requires a valid chargeable SIM card better be charged with the smaller amount possible for the period you desire (one month, one year), the card should not be depleted during that time because you are not supposed to answer the call - just discard it after you received the alert.
The box also contains a big LiPo battery that can hold the circuit at least 12 hours, if you leave if indoors for more time just leave it connected to the USB charger.
Price is 40$
I build these circuits myself, it takes me a few days to assemble and pack each enclosure, I can make other designs that are not mentioned at this page tailored to your needs, you can contact me via the link at the upper left side of the page to order or ask any question.
-Ronen
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this sensor is very sensitive to any movement of all sides, it should be placed in a closed environment or where there is little to no ambient movement except that you want to catch
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once this wire moves - you will get a phone call
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the box with mercury/call switch connected to it
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