{"product_id":"arduino-3x4-matrix-keypad-12-key-membrane","title":"Arduino 3x4 Matrix Keypad 12 Key Membrane Keypad Module","description":"\u003ch2\u003eAdd Numeric Input to Your Arduino Projects\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003e3×4 Matrix Membrane Keypad\u003c\/strong\u003e is a compact, 12-key input module featuring digits 0–9, * and # keys — the standard layout found on phone keypads and PIN entry systems. It uses a matrix scanning method to interface with just 7 GPIO pins, making it ideal for password locks, menu navigation, and data entry on Arduino and other MCU projects.\u003c\/p\u003e\u003ch3\u003eKey Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLayout:\u003c\/strong\u003e 3 columns × 4 rows = 12 keys (0–9, *, #)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterface:\u003c\/strong\u003e 7-pin connector (4 row + 3 column pins)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Voltage:\u003c\/strong\u003e 3.3V – 5V DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Membrane keypad (flexible, thin, lightweight)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e 7-pin dupont-compatible ribbon cable\u003c\/li\u003e\n\u003cli\u003eKey travel: tactile membrane press\u003c\/li\u003e\n\u003cli\u003eCompatible with Arduino \u003cem\u003eKeypad\u003c\/em\u003e library\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Applications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePIN \/ password entry systems\u003c\/li\u003e\n\u003cli\u003eDoor lock and security systems\u003c\/li\u003e\n\u003cli\u003eMenu and parameter input for LCD projects\u003c\/li\u003e\n\u003cli\u003eCalculator projects\u003c\/li\u003e\n\u003cli\u003eAccess control and alarm systems\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage Includes\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e1 × 3×4 Membrane Keypad with ribbon cable\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eWorks seamlessly with the Arduino \u003cem\u003eKeypad\u003c\/em\u003e library — define your row\/column pins and start reading key presses in minutes. Compatible with Arduino Uno, Nano, Mega, ESP8266, ESP32, and STM32.\u003c\/p\u003e","brand":"Generic","offers":[{"title":"Default Title","offer_id":47127662461100,"sku":"INP-KPD-3X4-MEM","price":80.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/0214\/4940\/files\/Arduino3x4Keypad4x3Matrix12Keys.jpg?v=1788454307","url":"https:\/\/www.mcustore.com\/products\/arduino-3x4-matrix-keypad-12-key-membrane","provider":"My Store","version":"1.0","type":"link"}