Wiring keypad in cube instead of matrix

[k212]

@Railroader

Using 6 I/O, like in Your example, a 2 dimensional rigging handles 9 buttons, one more then the 8 in Your example.

Isn't that what I wrote?

@k212

If we have 6 pins, we would have 9 (3x3) available keys in a matrix layout.

@k212

Using a 3 dimensional layout we can only get 8 (2 x 2 x 2).

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@Railroader

As common switches only have two terminals they can only be connected to two dimension planes.

In the image my 1st post, I have switches with 2 terminals, what's the problem?