10PCS LOT 2x4 Keypad V1.00 8Button Matrix Module for Arduino AVR PIC Overview This is a pack of 10 identical 2 by 4 matrix keypads, V1.00, each providing 8 push buttons in a compact module designed for easy integration with microcontroller projects. The keypad implements a simple keyboard matrix so multiple buttons can be read using a small number of IO pins. Key benefits Save IO pins and wiring: Matrix layout lets you scan 8 buttons using fewer microcontroller pins, simplifying wiring and freeing pins for other functions. Quick integration: Works with common microcontroller platforms, including Arduino, AVR, and PIC families, and is compatible with standard matrix scanning routines and libraries. Consistent input for prototypes and final designs: Uniform button layout and electrical behavior reduce development time and improve repeatability across multiple units. Pack of 10: Multiple modules included for parallel testing, multidevice builds, or spare parts, which helps speed development and reduce procurement cycles. Main features and attributes Button count and layout: 8 push buttons arranged in a 2 by 4 matrix for compact keypad input. Module version: V1.00, consistent hardware revision across all units in the lot. Function: Matrix keyboard input module suitable for numeric entry, menu navigation, mode selection, and multibutton control. Compatibility: Designed for use with Arduino, AVR, and PIC microcontroller families using standard scanning methods and libraries. Form factor: Compact module suitable for PCB mounting or incorporation into small enclosures and prototype boards. Performance: Provides reliable momentary push button input for human interfaces and control systems. How it solves common problems Reduces pin consumption: Matrix arrangement minimizes the number of input pins required, solving pin shortage on small microcontrollers. Simplifies prototyping: Ready to wire modules remove the need to build individual push button circuits, speeding up testing and iteration. Enables consistent user input: Physical buttons offer tactile, repeatable input for menus, PIN entry, and control panels where touchless methods are inappropriate. Use scenarios and applications Embedded control panels: Add numeric or function input to simple devices such as timers, motor controllers, and sensor interfaces driven by Arduino or PIC microcontrollers. Prototyping and education: Use in electronics labs and workshops to teach matrix scanning, keypad debouncing, and user interface design. Robotics and hobby projects: Implement mode selection, manual overrides, or quick command entry for robots, drones, and automated models. What you get Ten identical 2 by 4 keypad modules, V1.00, each with 8 push buttons arranged in a matrix configuration ready for integration into microcontroller projects. Notes for integration Use standard matrix scanning code or available keypad libraries for Arduino and compatible microcontrollers. Confirm wiring and pin assignments in your firmware match the module layout before deploying across multiple units. This product provides a practical, compact solution for adding dependable keypad input to microcontroller projects while conserving IO resources and accelerating development.