A multi-dimensional matrix keyboard interfacing circuit design

What is it about?

This paper presents a design method of keyboard circuit, which enables a single board computer with less pin resources to recognize a keyboard system consisting of a large number of switches. By studying the high-dimensional geometry, a schematic drawing scheme of the vertex of the high-dimensional geometry is proposed. Then, a universal circuit schematic design method is abstracted. Several experiments were designed to verify the results. It is found that this method is feasible and can be widely used in the design of new analog and digital sensor circuit systems.

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