i8

Backplane Microcontroller

Screen Shot 2015-04-07 at 11.49.40 PM

Here is how the ATmega328 will be used to control our backplane. In fact, two of them will be needed, because each of the 8 rotary encoders with SPST switching requires 3 I/Os, and the ATmega328 only provides 14 of them. Rotation and SPST switching will be controlled with dedicated I/Os, while RGB illumination will be controlled with an AS1113 LED driver.

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