[OpenTRV-dev] Mobile phone detector

Kevin Wood kevin at the-wood-family.com
Thu Oct 8 22:16:57 BST 2015

Hi guys,

Currently on holiday but my day job is developing systems to test mobile

I'll give this some thought.


Hi All,
> Damon has asked me to do a bit of research into using a mobile phone
> detector as a presence sensor for the bus shelters.
> The basic idea is an antenna, and an amplifier/filter tuned to the
> appropriate frequency. Additionally we'd need some kind of conditioning
> to get the output into a microcontroller readable format.
> Does anyone have any thoughts on how practical this would be for sensing
> whether there are people waiting?
> Regards,
> Deniz
> P.S. A quick google for how the detectors work gave me the following
> results:
> http://www.eeweb.com/project/circuit_projects/cell-phone-detector
> http://www.electroschematics.com/1035/mobile-bug-detector-sniffer/
> http://www.instructables.com/id/Free-Energy-Cellphone-detector-From-Cellphone-An/
> http://www.instructables.com/id/VHF-UHF-RF-Sniffer/?ALLSTEPS
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