Microcontroller Keypad Pushbutton Matrix 4x3 4x4 16 Keys Industrial Keyboard Module Row and Column Scanning 2026 Overview This keypad module provides a compact, reliable pushbutton matrix available in 4x3 and 4x4 layouts up to 16 keys. Designed for microcontroller projects and industrial control panels, the module uses row and column scanning to detect key presses while minimizing required input pins. 2026 design focuses on precision and stable performance for longterm use. Key benefits Simplifies input wiring: matrix scanning reduces the number of microcontroller input pins needed compared to separate switches. Reliable operation: tactile pushbuttons on a PCB provide consistent contact and stable performance for repeated use. Fast integration: standard pin headers make it straightforward to connect to common development boards and embedded controllers. Compact and robust: suitable for tight panel layouts and repeated mechanical use in industrial or DIY applications. Flexible configurations: available in 4x3 and 4x4 layouts to match project keycount requirements. What it does and how it helps Row and column scanning: arranges keys in a matrix so firmware can poll rows and columns to identify pressed keys efficiently. This saves I/O and simplifies wiring for microcontroller systems. Tactile pushbutton input: delivers clear tactile feedback for reliable user interaction, reducing mispresses in control environments. Modular connection: pin header interfaces allow quick connection to microcontroller input ports and enable rapid prototype or production integration. Compatibility and integration Compatible with generalpurpose microcontrollers and single board computers that support GPIO scanning. Easy to integrate with common firmware scanning routines for matrix keypads. Works well in both prototyping and production environments where row and column scanning is practical. Key attributes Layouts: 4x3 and 4x4 matrix options; up to 16 keys for the 4x4 version. Function: pushbutton matrix with row and column scanning for efficient key detection. Construction: PCBmounted tactile pushbuttons and key caps designed for repeated use. Interface: standard row and column pin header for direct connection to controller GPIO. Performance: engineered for precision switching and stable operation under repeated actuation. Typical applications Industrial control panels: use as an operator input panel for machine controls, parameter entry, or mode selection. Embedded projects and prototypes: integrate with microcontrollers for menu navigation, numeric entry, and user input during development. Kiosks and vending or pointof interfaces: implement compact numeric or function keypads for basic customer or operator input. Installation and usage tips Use a standard matrix scanning routine in firmware to read row and column states and implement debouncing in software for stable key detection. Choose the 4x3 layout for compact numeric entry needs and the 4x4 layout when more keys or function keys are required. Secure the module mechanically in the panel to avoid flexing of the PCB that could affect switch reliability. What is included Keypad module in the selected layout (4x3 or 4x4) with row and column pin header for direct wiring or header soldering. This keypad module offers a practical and reliable input solution for microcontrollerdriven projects and industrial applications where compactness, reduced I/O usage, and stable tactile performance are required.