Everything for Electronics
Nuts & Volts Magazine (July 2016)

The Key to the Code

By Jon McPhalen    View In Digital Edition  

Matrix keypads are not terribly sexy and exciting. However, they are very useful for stand-alone embedded projects. Combine one with an LCD or other display, and the basis for many useful practical projects are at our disposal. See show to implement them in applications such as puzzles and locks for recently popular escape rooms.


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