Description �� Matrix Keypad Module 3×4 / 4×4 | AuscomTech This matrix keypad module is a compact input device available in both 3×4 (12-key) and 4×4 (16-key) configurations. It provides a simple and efficient way to add numeric or control input using a row-column scanning interface. Commonly used with Arduino, ESP32, Raspberry Pi, and other microcontroller platforms for user input and control panels. ⭐ Key Features 3×4 & 4×4 Options – Supports both 12-key and 16-key layouts for flexible applications Matrix Scanning Design – Reduces GPIO usage by using row and column input method Full Key Set – Includes numbers plus * and #, with A–D keys on 4×4 version Membrane Construction – Slim, lightweight, and suitable for embedded installations Easy Interface – Direct connection to microcontroller digital pins Wide Compatibility – Works with Arduino, ESP32, STM32, Raspberry Pi and more �� Technical Specifications Product Type: Matrix keypad module Layouts: 3×4 (12 keys) / 4×4 (16 keys) Interface: Row/column pinout Material: ABS membrane switch layer Mounting: Adhesive backing Logic: Passive switch matrix (no controller IC) �� Typical Applications Arduino and ESP32 input systems Password or PIN entry panels DIY control interfaces Security systems Menu navigation systems Embedded electronics projects ⚠️ Important Notes This is a passive keypad and requires software scanning No onboard processing chip included Ensure correct GPIO configuration for matrix reading �� Package Includes 1 × Matrix Keypad Module (selected variation) �� Recommended Accessories (Not Included) Arduino or ESP32 board – for interfacing and control Dupont jumper wires – for quick connections Breadboard – for prototyping setups Resistor kit – useful for stable input configurations
