Production Description
The 4x4 matrix keyboard is composed of 16 touch switch buttons, arranged in a matrix of 4 rows and 4 columns. Each row and column is labeled with numbers S1 to S16, with row line R input and column line C output. The external input and output of the matrix keyboard are connected to the I/O port of the microcontroller and the detection button is pressed. It can be applied to input scenarios such as calculators, electronic door locks, etc.
Product Function diagram
The wiring between the C4-R4 matrix keyboard and the digital pins D2-D9 of the microcontroller is shown in the figure below:
Product Describe
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