Gadgets powered wirelessly at home with a simple Wi-Fi router – tech – 01 June 2015 – New Scientist

Cool. Fuck wires and plugging your phone in.

Robert's Interests

Gadgets powered wirelessly at home with a simple Wi-Fi router – tech – 01 June 2015 – New Scientist

When someone is browsing the web, the Wi-Fi signal is active and can be used to power devices. However, when not browsing the signal goes quiet.

β€œWith Wi-Fi for communications, you only want to transmit when you have data to send,” Talla says. β€œBut for power delivery, you want to transmit something all the time. There’s a clear mismatch.”

To get around this, the team designed software that broadcasts meaningless data across several Wi-Fi channels when no one is using the internet.

The problem is that Wi-Fi is never going to provide a very powerful signal. Wi-Fi is tightly regulated in many countries – the US Federal Communications Commission (FCC), for example, limits the power of a Wi-Fi broadcast to 1 watt. An iPhone charger delivers at least 5 watts –…

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