{"product_id":"3x4-matrix-membrane-keypad-12-key-arduino","title":"3x4 Matrix Membrane Keypad 12-Key for Arduino Projects","description":"\u003ch2\u003e3x4 Matrix Membrane Keypad 12-Key for Arduino Projects\u003c\/h2\u003e\n\u003cp\u003eThe 3x4 matrix membrane keypad is a compact 12-key input module for Arduino, Raspberry Pi, ESP32, PIC, AVR, and other microcontroller projects. It is commonly used for password locks, menu control, numeric input, access panels, automation systems, and student electronics projects in Pakistan.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e12-key layout with digits 0-9, star, and hash keys\u003c\/li\u003e\n  \u003cli\u003e3-column x 4-row matrix wiring for simple microcontroller input\u003c\/li\u003e\n  \u003cli\u003eThin membrane design suitable for panels and project enclosures\u003c\/li\u003e\n  \u003cli\u003eEasy to interface with Arduino, ESP32, Raspberry Pi, PIC, and AVR boards\u003c\/li\u003e\n  \u003cli\u003eUseful for password entry, menu selection, and numeric control projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Details\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eMembrane matrix keypad\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKey layout\u003c\/td\u003e\n\u003ctd\u003e3 x 4 matrix, 12 keys\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKeys\u003c\/td\u003e\n\u003ctd\u003e0-9, *, #\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eInterface\u003c\/td\u003e\n\u003ctd\u003eMatrix digital input\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eFlexible flat cable\/pin tail as shown\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eCompatible boards\u003c\/td\u003e\n\u003ctd\u003eArduino, ESP32, ESP8266, Raspberry Pi, PIC, AVR, STM32\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eRecommended use\u003c\/td\u003e\n\u003ctd\u003eDIY electronics, security locks, menu input, robotics, student projects\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage includes\u003c\/td\u003e\n\u003ctd\u003e1 x 3x4 membrane keypad\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino password lock projects\u003c\/li\u003e\n  \u003cli\u003eAccess control and security panels\u003c\/li\u003e\n  \u003cli\u003eNumeric input for embedded systems\u003c\/li\u003e\n  \u003cli\u003eMenu navigation for LCD projects\u003c\/li\u003e\n  \u003cli\u003eRobotics and automation control panels\u003c\/li\u003e\n  \u003cli\u003eSchool, college, and maker projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this keypad with Arduino?\u003c\/strong\u003e\u003cbr\u003eYes. It is commonly used with Arduino boards through digital pins and a keypad\/matrix scanning library.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many keys does it have?\u003c\/strong\u003e\u003cbr\u003eIt has 12 keys arranged in a 3-column by 4-row matrix.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it need a separate power supply?\u003c\/strong\u003e\u003cbr\u003eNo separate high-current supply is required. It works as a passive switch matrix connected to microcontroller I\/O pins.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use it for a password lock project?\u003c\/strong\u003e\u003cbr\u003eYes. It is a popular choice for password entry, door lock, access control, and security code projects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it compatible with Raspberry Pi?\u003c\/strong\u003e\u003cbr\u003eYes, it can be connected to Raspberry Pi GPIO pins with suitable code and correct voltage-safe wiring.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be mounted on a project box?\u003c\/strong\u003e\u003cbr\u003eYes. The thin membrane style is useful for front panels and compact enclosures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs wiring polarity important?\u003c\/strong\u003e\u003cbr\u003eIt is a switch matrix rather than a powered polarity-based module, but the row\/column pin order must match your code.\u003c\/p\u003e\n\n\u003ch3\u003eImportant Note\u003c\/h3\u003e\n\u003cp\u003eConfirm the pin order with a multimeter or your project code before final installation. Avoid bending the flexible cable sharply, and use suitable pull-up or pull-down configuration in your microcontroller program.\u003c\/p\u003e","brand":"Embeded Studio","offers":[{"title":"Default Title","offer_id":62288046588274,"sku":"ES-KEYPAD-3X4-MEMBRANE","price":120.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/7935\/3202\/files\/3x4-Matrix-Membrane-Type-Keypad.webp?v=1788544225","url":"https:\/\/embededstudio.com\/products\/3x4-matrix-membrane-keypad-12-key-arduino","provider":"Embeded Studio","version":"1.0","type":"link"}