{"product_id":"mpr121-capacitive-touch-sensor-module-i2c-keyboard-arduino","title":"MPR121 Capacitive Touch Sensor Module – I2C Arduino Keyboard","description":"\n\u003ch2\u003eMPR121 Breakout V1.2 Capacitive Touch Sensor Controller Module\u003c\/h2\u003e\n\u003cp\u003eThe MPR121 Breakout V1.2 is a compact, high-performance capacitive touch sensor controller module designed for makers, hobbyists, and engineers working with Arduino and other development boards. Using the I2C communication protocol, this module enables you to add up to 12 independent touch-sensitive inputs to your project with minimal wiring and effort.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're building a custom keyboard, interactive installation, musical instrument, or any touch-sensitive interface, this module delivers reliable detection and seamless integration with Arduino, Raspberry Pi, and compatible platforms.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e12 Capacitive Touch Channels:\u003c\/strong\u003e Detect touch on up to 12 electrodes independently — ideal for custom keyboards, sliders, and input panels.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eI2C Interface:\u003c\/strong\u003e Simple two-wire communication (SDA\/SCL) keeps wiring clean and frees up GPIO pins on your development board.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature:\u003c\/strong\u003e Reliable performance from -40°C to +85°C, suitable for a variety of environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Supply Voltage:\u003c\/strong\u003e Operates at 2.5V–3.6V, making it compatible with 3.3V systems including Arduino and Raspberry Pi.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSMD Package:\u003c\/strong\u003e Compact surface-mount design for easy integration into projects and prototypes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNo High-Concern Chemicals:\u003c\/strong\u003e Safe for general electronics use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNew Condition:\u003c\/strong\u003e Brand new module, ready to use out of the box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%;\"\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eCommunication Protocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eI2C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eSupply Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e2.5V – 3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eTouch Channels\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e-40°C to +85°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003ePackage Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eSMD\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e\u003cstrong\u003eQuantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border: 1px solid #ddd; padding: 8px;\"\u003e1 Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eArduino-based touch keyboard projects\u003c\/li\u003e\n  \u003cli\u003eInteractive DIY electronics and prototyping\u003c\/li\u003e\n  \u003cli\u003eCustom human-machine interfaces (HMI)\u003c\/li\u003e\n  \u003cli\u003eTouch-sensitive musical instruments\u003c\/li\u003e\n  \u003cli\u003eMaker fairs, STEM education, and lab experiments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the MPR121 Capacitive Touch Sensor Module compatible with Arduino boards?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! The MPR121 module communicates via the I2C protocol (SDA\/SCL pins), making it fully compatible with Arduino Uno, Mega, Nano, and most other Arduino development boards, as well as Raspberry Pi and other 3.3V-compatible platforms.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many touch inputs can the MPR121 module support?\u003c\/h4\u003e\n\u003cp\u003eA: The MPR121 supports up to 12 independent capacitive touch channels, allowing you to create custom keyboards, button arrays, sliders, or any other multi-input touch interface for your project.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What voltage does the MPR121 Breakout module require?\u003c\/h4\u003e\n\u003cp\u003eA: The module operates on a supply voltage of 2.5V to 3.6V, making it ideal for use with 3.3V Arduino, Raspberry Pi, and similar microcontroller platforms.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I use this module for DIY touch keyboard projects?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The MPR121 I2C Capacitive Touch Sensor module is a popular choice for building custom DIY touch keyboards, MIDI controllers, interactive displays, and other touch-sensitive electronic projects.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the MPR121 Capacitive Touch Sensor Module compatible with Arduino boards?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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