radio powered by the energy in messages it receives

[haven]

http://www.wired.com/2014/09/ant-size-radio/

This is way cool, the start of mesh networks that can power themselves. Today, the reach of the radio transmission is less than 2 feet, but it's the start of a new style of communications. 10 years from now, you'll look back at this research and say, "That's when it really got started."

 

[DaveInDenver]

This is the principle behind passive RFID. The little tags they put on everything use the power from the reader to power their transmitters.

 

[1leglance]

Oh how Nicola Telsa is laughing in his grave

 

[fowldarr]

For the first time ever, I wish I could 'like' a post. Thanks Lance

 

[AlbanyTom]

I thought this was going to be about crystal radios...