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CocoMidiMultiplexer

4 channel multiplexer CocoTouch Midi Out

Pin connection

Channel Select:

  • Attiny Pin 4 (GND) ->> 4051 S0 pin 11 (always LOW)
  • Attiny Pin 5 -> 4051 S1 Pin 9
  • Attiny Pin 6 -> 4051 S2 Pin 10

Capacitive sensing:

  • Attiny Pin 3 sense (PB2) -> 4051 Z Pin 3
  • Attiny Pin 7 reference (PB4) -> floating

by this table

http://arduinolearning.com/wp-content/uploads/2015/12/4051-truth-table.jpg

we can only get value from channel 0, 2, 4 ,6 (since S0 always L)

so we get value from pin 13, 15, 1, 2

reference: http://playground.arduino.cc/Learning/4051

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4 channel multiplexer midi out

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