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So guys, I was thinking about using some stick on NFC chips and connect them to a phone so that if someone leaves the house without their keys or wallet it would set of an alarm, on the phone, due to the keys or whatever item leaving the vicinity of the mobile phone it was tied to. My understanding of NFC chips is limited to my bank card but it seems they can be programmed but also that they have a short range? Can the range be more than a few centimetres, maybe half a metre to a metre?
I was thinking to use these or these
I was thinking to use these or these
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