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Topic: Presence detection. (Read 1 time) previous topic - next topic


Jan 29, 2011, 07:29 pm Last Edit: Jan 29, 2011, 07:31 pm by mellink Reason: 1
So is HiD a longer range version of RFID?
Sorry I thought RDIF was only a short range thing were it gathers it power via induction in its loops.

How do car manufactures do it then? for example keyless go etc?


Hi again,
should have said it dosen't really matter if I get some false positives. So may radio trasmitter but i have no idea how to do this. Hnecy why im asking.



There are kits that provide a key FOB that can be interfaced with a micro controller. You would still need to hit a button on the key FOB though.

Sparkfun also sells a few items which you could use. Look up 'nordic key fob'.

Info: http://blog.diyembedded.com/

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