{"title":"Adafruit MPR121 12-Key Capacitive Touch Sensor Gator Breakout - STEMMA QT / Qwiic","handle":"adafruit-mpr121-12-key-capacitive-touch-sensor-gator-breakout-stemma-qt-qwiic","url":"/products/adafruit-mpr121-12-key-capacitive-touch-sensor-gator-breakout-stemma-qt-qwiic","description":"The Adafruit MPR121 Gator Breakout adds 12 capacitive touch inputs to any microcontroller project — no soldering required. With large alligator/croc-clip friendly pads and STEMMA QT / Qwiic connectors, simply clip conductive materials to the pads and plug into your board's I2C port.\n\nThe MPR121 handles all capacitive touch filtering and threshold detection internally over I2C, making it far simpler than reading analog inputs directly. Two selectable I2C addresses (via the ADDR solder jumper) allow up to 24 touch pads on a single bus. The breakout includes a 3.3 V regulator and level shifting for compatibility with both 3.3 V and 5 V systems, plus an IRQ LED that blinks on touch detection for easy debugging.\n\nKey Features\n\n\n12 Capacitive Touch Channels – Each with its own large gator-clip pad\n\nMPR121 Touch Controller – Built-in filtering and configurable sensitivity\n\nI2C Interface – 2 selectable addresses for up to 24 pads on one bus\n\nSTEMMA QT / Qwiic Connectors – Solderless I2C connection (cable not included)\n\n3.3 V and 5 V Compatible – On-board regulator and level shifting\n\nIRQ LED Indicator – Blinks when a touch is detected\n\nNo Soldering Required – Clip conductive materials directly to the oversized pads\n\n\nIdeal For\n\nInteractive art and music installations\nCustom touch-sensitive controllers and keyboards\nEducational projects exploring capacitive sensing\nCostume and wearable touch interfaces\n\n\nPackage Contents\n\n1× Adafruit MPR121 12-Key Capacitive Touch Gator Breakout (assembled)\n\n\n\nTip: For touch contacts, use copper foil, metallic nylon, or pyralux — then connect with alligator clips to the breakout pads.\n\n\nResources\n\nSTEMMA QT Overview\nMPR121 Touch Sensor Tutorial\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":3490,"title":"Default Title","sku":"AF-4830","price":14.16,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":100,"option1":"Default Title"}]}