Researcher has developed, at a cost of less than one dollar, a wireless light switch that runs without batteries, can be installed anywhere on a wall and could reduce the cost of wiring a house by …::A U of A engineering researcher has developed a wireless light switch that could reduce the cost of wiring a house by as much as 50 per cent.
“RF wireless charging is a type of uncoupled wireless charging in which an antenna embedded in an electronic device can pick up low level radio frequency waves from external sources and convert the waves’ energy to direct current (DC) voltage.”
I can’t find that quote in the article—or anything that definitively indicates they’re talking about RF power rather than RFID signals (other than saying the transmitters “power up” all the switches, which could just be sloppy terminology.)
The article says they are powering it using dedicated transmitters:
“each floor would have one or two RF (radio frequency) power transmitters to power up all switches inside the house.”
It’s confusing because earlier they talk about energy harvesting, which implies “free”. But then they talk about how you will need to run these transmitters, which certainly isn’t free.
