The Boston Globe is reporting on an effort by researchers at Boston University’s Photonics Center to use low-power light systems as wireless networks. Yes, LEDs could become part of your home or office wireless network plan if BU researchers’ plans pan out.
“The technique used is to flash the light on and off, or modulate the light, to transmit data,” [engineering professor Thomas] Little said. The pulses are so rapid that they can be picked up by an electronic sensor, but not by the human eye. That allows the lamp to light a room and transmit information at the same time.
Separately, Iowa State University researchers are developing underground wireless soil sensors that one day could help farmers better manage their crops (the sensors collect info on soil temperature and nutrient content).
Wireless soil sensors will be tested in a research field later this fall. Photo by Bob Elbert.
