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iPhone headset socket hijacked to power DIY peripherals

You might have noticed that the Square credit card reader uses Apple's 3.5mm headset jack to transmit power and data at once, and gadgeteers at the University of Michigan are busy open-sourcing the same technique for all the DIY contraptions you can dream of.
  • EKG
  • temperature
  • humidity
  • motion sensors

Engadget

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