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Results tagged with wireless-communication
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user 90
6
votes
How can I build an anti proximity alarm?
Reverse the logic for the RF tag detector and alarm. As you state, RF detectors and alarms activate when the RF tag is within range of the detector. Change the logic of the detector-alarm system to so …
- 9,752
0
votes
Accepted
how would I identify when and who enter through a doorway, assuming they can have part of th...
Radio frequency ID chips are an easy way to achieve what you want.
Some stores place them on their high valued merchandise items to prevent theft. RF reading devices are located at the entrances and w …
- 9,752