The example in this post shows how multiplexers can be used to increase the number of I/O pins for sensor readings or outputs. A multiplexer chip uses control pins to toggle between multiple channels (3 control pins –> 8 channels, 4 control pins –> 16channels).
also see: Tom Igoe’s Multiple Inputs to a Microcontroller Using a Multiplexer
>> http://itp.nyu.edu/physcomp/Tutorials/Multiplexer
also see: Charlieplexing >> http://en.wikipedia.org/wiki/Charlieplexing
8 channel multiplexer >> HCF 4051BE
16 channel multiplexer >> CD 4067BE
rSkin pressure sensor matrix
>> http://www.kobakant.at/DIY/?p=3363
code >> https://github.com/plusea/CODE/tree/master/PROJECT%20CODE/rSkin
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