3x4 Membrane Matrix Keypad 12Key Numeric Switch A compact, lowprofile 3x4 membrane matrix keypad designed for easy numeric input in electronics and embedded projects. The keypad uses a standard matrix layout for simple scanning and wiring, providing a reliable interface where a small numeric pad is required. Key benefits Compact numeric input: 12key layout fits tight spaces and gives fast access to numbers and common function keys. Easy to integrate: Standard matrix wiring works with common microcontroller scanning routines and libraries for Arduino and Raspberry Pi. Low profile and flexible: Thin membrane construction saves space and simplifies enclosure design. Consistent performance: Matrix contact design offers dependable switching for lowcurrent digital inputs. Cost effective and versatile: Suitable for prototypes, replacements, and small production runs. Product highlights Function: 3 rows by 4 columns matrix arrangement, supports standard keypad scanning and multiplexing techniques. Size: 3x4 configuration supplying 12 keys in a compact footprint ideal for control panels and handheld devices. Material and construction: Membrane switch keypad with a flat, flexible surface that mounts easily behind or within panels. Compatibility: Works with microcontrollers and development boards that accept matrix keypads. Typical uses include connection to Arduino and Raspberry Pi through direct GPIO scanning or keypad interface circuits. Performance: Designed for reliable lowvoltage switching with stable contact response under normal usage conditions. Installation and use Wiring: Connect row and column lines to digital inputs and use a matrix scanning routine to detect key presses. Mounting: Lowprofile membrane makes it easy to install under bezels or directly on panels using adhesive or mechanical fasteners. Tips: Implement software debounce and state handling to ensure clean, repeatable input detection. Typical applications Embedded and microcontroller projects for numeric entry and menu navigation. Access control panels and small security interfaces where compact numeric input is required. DIY electronics, prototypes, and replacements for devices that use a membrane numeric keypad. A practical, easytointegrate 3x4 keypad for any project that needs a reliable numeric input solution without adding bulk.