4x4 Matrix Keypad Module

4x4 matrix keypad with 16 tactile keys (0–9, A–D, *, #)
Membrane-style keypad with easy-to-read labels
Connects to microcontrollers using 8-pin interface
Compatible with Arduino, ESP32, Raspberry Pi, and other microcontroller boards
Ideal for DIY electronics, access control systems, security keypads, and menu navigation projects

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