The definitive engineering breakdown: http://drop-kicker.com/2014/06/ifind-rf-energy-harvesting-bluetooth-beacon/ http://drop-kicker.com/2014/06/ifind-rf-energy

The definitive engineering breakdown: http://drop-kicker.com/2014/06/ifind-rf-energy-harvesting-bluetooth-beacon/ http://drop-kicker.com/2014/06/ifind-rf-energy-harvesting-bl... (Drop-Kicker is amazing.)