28 Dec '16, 7pm

Using #ProximityDetection and Ambient Light #Sensing to Save #IoT Device Power

Combining proximity and ambient light sensors into a single package has been common practice in the handheld market for several years. The integration takes advantage of the fact that photo detectors are used for both functions. For ambient light detection, the photo diode output is processed and filtered to mimic the response of the human eye. This information is then used to appropriately dim the screen. For proximity detection, an infrared emitting diode (IRED) sends out pulsed energy and a photo detector tuned to the IRED wavelength looks for that reflected energy. The combination saves valuable board space by using a single package that shares power and communication with the outside world.

Full article: http://www.digikey.com/en/articles/techzone/2016/dec/usin...

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IoT Ready to Light Up in 2017 | EE Times

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