{"product_id":"4x4-matrix-keypad-module-16-button-arduino-breadboard","title":"4x4 Matrix Keypad Module – 16 Button Arduino Keyboard","description":"\n\u003ch2\u003e4×4 Matrix Keypad Module – 16-Button Keyboard for Arduino \u0026amp; DIY Projects\u003c\/h2\u003e\n\u003cp\u003eUnlock the full potential of your microcontroller projects with this compact \u003cstrong\u003e4×4 Matrix Keypad Module\u003c\/strong\u003e. Featuring 16 tactile push buttons arranged in a 4-row by 4-column grid, this breadboard-compatible module connects to your Arduino, MCU, or any compatible development board via a single 8-pin interface — saving valuable GPIO pins while giving you full alphanumeric input capability.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're building a password-protected door lock, a custom calculator, a menu navigation system, or a robotics controller, this keypad module is the perfect input solution for your next DIY electronics project.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e16 Tactile Buttons\u003c\/strong\u003e – Arranged in a 4×4 matrix grid for efficient, multi-function input\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8-Pin Interface\u003c\/strong\u003e – Requires only 8 digital I\/O pins, ideal for Arduino Uno, Nano, Mega, and similar boards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBreadboard Compatible\u003c\/strong\u003e – Dupont-style connector makes plug-and-play prototyping fast and easy\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature\u003c\/strong\u003e – Reliable performance from -40°C to 80°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBeginner-Friendly\u003c\/strong\u003e – Perfect for starter kits, STEM education, and hobbyist electronics\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight\u003c\/strong\u003e – Easy to integrate into any enclosure or PCB layout\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003eMade in Mainland China\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLayout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4×4 Matrix (16 buttons)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInterface Pins\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8-pin (4 row + 4 column)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnector Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDupont \/ Breadboard compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°C to 80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eArduino, ESP32, Raspberry Pi, STM32, and most MCUs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 4×4 Matrix 16-Button Keypad Module (8-pin)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGreat For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino starter kits \u0026amp; DIY electronics projects\u003c\/li\u003e\n  \u003cli\u003eSecurity \u0026amp; access control systems (PIN entry)\u003c\/li\u003e\n  \u003cli\u003eRobotics and automation controllers\u003c\/li\u003e\n  \u003cli\u003eSTEM education and classroom experiments\u003c\/li\u003e\n  \u003cli\u003eCustom embedded system interfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLooking for more tools for your workbench or DIY kit? Check out the \u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e or the \u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge – DIY Tool\u003c\/a\u003e to round out your toolkit.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is this 4×4 matrix keypad module compatible with Arduino Uno and Nano?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This 4×4 matrix keypad module is fully compatible with Arduino Uno, Nano, Mega, and virtually any other microcontroller board that has available digital I\/O pins. Simply connect the 8 pins (4 rows, 4 columns) to your board's digital pins and use the popular Keypad.h library to get started quickly.\u003c\/p\u003e\n\u003ch4\u003eQ: How many I\/O pins does this keypad module use?\u003c\/h4\u003e\n\u003cp\u003eA: The module uses 8 digital I\/O pins — 4 for rows and 4 for columns. This matrix scanning approach lets you read 16 individual buttons using only 8 pins, making it highly efficient for microcontroller projects where GPIO pins are limited.\u003c\/p\u003e\n\u003ch4\u003eQ: Can I use this keypad module for a PIN entry or password system?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. This keypad is one of the most popular choices for building PIN-entry systems, combination locks, and secure access control projects with Arduino or other MCUs. The 16 buttons include numbers (0–9) and function keys, giving you everything you need for a custom input interface.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is this 4×4 matrix keypad module compatible with Arduino Uno and Nano?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! This 4×4 matrix keypad module is fully compatible with Arduino Uno, Nano, Mega, and virtually any other microcontroller board that has available digital I\/O pins. Simply connect the 8 pins (4 rows, 4 columns) to your board's digital pins and use the popular Keypad.h library to get started quickly.\"}}, {\"@type\": \"Question\", \"name\": \"How many I\/O pins does this keypad module use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The module uses 8 digital I\/O pins — 4 for rows and 4 for columns. 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The 16 buttons include numbers (0–9) and function keys, giving you everything you need for a custom input interface.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"4x4 Matrix Keypad Module – 16 Button Arduino Keyboard\", \"item\": \"https:\/\/n8ande-60.myshopify.com\/products\/4x4-matrix-keypad-module-16-button-arduino-breadboard\"}]}\u003c\/script\u003e","brand":"Axl","offers":[{"title":"Default Title","offer_id":44165686722647,"sku":"\u003cnone\u003e","price":7.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0676\/6008\/7383\/files\/Se6cf702f0fe540958f52bc0b5f175c13d.webp?v=1786726056","url":"https:\/\/axlcustomersupport.com\/products\/4x4-matrix-keypad-module-16-button-arduino-breadboard","provider":"Axl","version":"1.0","type":"link"}