When I was working on the temperature control feature of Lady Heather,  I 
noticed that I could detect when ever I opened the refrigerator door (in the 
next room) or when I was in the same room as the Tbolt by looking at the EFC or 
temperature sensor plots...  the Thunderbolt oscillator makes a nice 
thermometer.  People are basically a 100 watt space heater.

Another time I was working on a precision temperature recorder (based upon an 
Analog Devices V/F chip).  It could easily detect when a person walked into or 
left a (rather large) lab.  You could even quantify the number of people in the 
lab (one particularly large guy counted as two people).

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>  People would say "nice thermometer, guys :-(                                 
>           
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