{"product_id":"4x4-matrix-membrane-keypad-16-key-arduino","title":"4x4 Matrix Membrane Keypad 16-Key for Arduino Projects","description":"\u003ch2\u003e4x4 Matrix Membrane Keypad 16-Key for Arduino Projects\u003c\/h2\u003e\n\u003cp\u003eThe 4x4 matrix membrane keypad is a compact 16-key input module for Arduino, Raspberry Pi, ESP32, PIC, AVR, STM32, and other microcontroller projects. It is useful for password locks, menu input, access control panels, numeric entry, robotics, automation, and student electronics projects in Pakistan.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e16-key layout with numbers, letters, star, and hash keys\u003c\/li\u003e\n  \u003cli\u003e4-column x 4-row matrix wiring for microcontroller input\u003c\/li\u003e\n  \u003cli\u003eThin membrane design suitable for panels and compact enclosures\u003c\/li\u003e\n  \u003cli\u003eEasy to interface with Arduino, ESP32, Raspberry Pi, PIC, AVR, and STM32 boards\u003c\/li\u003e\n  \u003cli\u003eUseful for password entry, keypad menus, access systems, and 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\u003e4 x 4 matrix, 16 keys\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eKeys\u003c\/td\u003e\n\u003ctd\u003e0-9, A-D, *, #\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, password locks, menu input, access panels, robotics, student projects\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003ePackage includes\u003c\/td\u003e\n\u003ctd\u003e1 x 4x4 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 and security code projects\u003c\/li\u003e\n  \u003cli\u003eAccess control panels and keypad input systems\u003c\/li\u003e\n  \u003cli\u003eNumeric and menu input for LCD projects\u003c\/li\u003e\n  \u003cli\u003eRobotics and automation control panels\u003c\/li\u003e\n  \u003cli\u003eEmbedded systems prototyping\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 4x4 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 16 keys arranged in a 4-column by 4-row matrix.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between 3x4 and 4x4 keypad?\u003c\/strong\u003e\u003cbr\u003eThe 4x4 keypad has four extra keys, usually A, B, C, and D, which are useful for menus and more complex control projects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it need a separate power supply?\u003c\/strong\u003e\u003cbr\u003eNo. 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?\u003c\/strong\u003e\u003cbr\u003eYes. It is widely used for password locks, door lock projects, security panels, and access-control prototypes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs it compatible with Raspberry Pi?\u003c\/strong\u003e\u003cbr\u003eYes, it can be used with Raspberry Pi GPIO pins when wired correctly and handled with voltage-safe code.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be mounted on a project box?\u003c\/strong\u003e\u003cbr\u003eYes. The flat membrane design is suitable for front panels and compact enclosures.\u003c\/p\u003e\n\n\u003ch3\u003eImportant Note\u003c\/h3\u003e\n\u003cp\u003eConfirm the keypad pin order before final wiring because row and column order can vary by batch. Avoid sharp bends in the flexible cable and configure pull-up or pull-down logic correctly in your program.\u003c\/p\u003e","brand":"Embeded Studio","offers":[{"title":"Default Title","offer_id":62288048030066,"sku":"ES-KEYPAD-4X4-MEMBRANE","price":120.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/7935\/3202\/files\/4x4_Matrix_Keypad.webp?v=1788544464","url":"https:\/\/embededstudio.com\/products\/4x4-matrix-membrane-keypad-16-key-arduino","provider":"Embeded Studio","version":"1.0","type":"link"}