Hammond Commodore MIDI Interface


Posted on Feb 6, 2014

Here is the schematic circuit board. Each switch puts out -2V when it`s on and 0V when it`s off. The four 4067 chips multiples the 64 switch signals into 4 signals that go back to the main PIC board.


Hammond Commodore MIDI Interface
Click here to download the full size of the above Circuit.




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