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The 4x4 Matrix keypad is commonly used as input in Arduino projects. It features a total of 16 keys, meaning it has the same input values. The keys of each row and column are connected through pins externally - the Y1-Y4 pins control the rows, while the X1-X4 pins control the columns.
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.