Engineers at the University of Michigan have put together a prototype device that can be powered and communicate via the audio jack on an iPhone. Currently if you want to create an accessory that is to be used with the 30 pin connector on the iPhone you must pay a licensing fee to Apple as well as a percentage of the profit made on said device. Using the audio jack for accessories will save money as there will be no need for licensing or proprietary hardware.
The parts used to build the device cost a total of $2.34 (in bulk), and the audio port can deliver several milliwatts at 3 V and offers bidirectional communications at a data rate of 8.8 kbaud. You won’t be able to run any data-hungry applications, but this should be more than enough to transfer text or a remote signal. The developers envision small, low-powered sensors for thing like element detection or moisture sensors. Check out the video of a prototype ECG sensor for the HiJack.
[Link to HiJack]
HiJack: Cheap iPhone Accessories originally appeared on tech.nocr.at on 2011/01/16.
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