{"title":"Adafruit QT 5V to 3V Shifter Breakout - STEMMA QT / Qwiic","handle":"adafruit-qt-5v-to-3v-shifter-breakout-stemma-qt-qwiic","url":"/products/adafruit-qt-5v-to-3v-shifter-breakout-stemma-qt-qwiic","description":"The Adafruit QT 5V to 3V Shifter Breakout lets you safely connect 3.3 V STEMMA QT / Qwiic sensors to 5 V microcontrollers like the Arduino Uno. Many I2C sensors and Qwiic-compatible devices are not 5 V safe — connecting them directly to a 5 V board risks damage. This breakout handles the voltage translation so your 3.3 V sensors stay protected.\n\nOn the input side, connect your 5 V microcontroller. The on-board 3.3 V regulator (500 mA) steps the power down while level-shifting circuitry translates I2C signals to 3.3 V on the output side. STEMMA QT / Qwiic connectors on both sides make wiring solderless, and breadboard breakout pins let you use it on a perfboard too.\n\nKey Features\n\n\n5 V to 3.3 V Regulation – On-board 3.3 V regulator provides up to 500 mA for connected sensors\n\nI2C Level Shifting – Safely translates 5 V I2C signals down to 3.3 V\n\nSTEMMA QT / Qwiic Connectors – Plug-and-play I2C on both sides; no soldering required\n\nBreadboard Friendly – Breakout pins for prototyping; doubles as a QT-to-perfboard adapter\n\nProtects 3.3 V Sensors – Prevents over-voltage damage from 5 V microcontrollers\n\n\nAlso Consider\n\n\nQT 3V to 5V Level Booster – The reverse: boosts 3.3 V up to 5 V for sensors that need higher voltage\n\n\nIdeal For\n\nConnecting 3.3 V Qwiic / STEMMA QT sensors to 5 V Arduino boards\nProtecting I2C devices that are not 5 V tolerant\nBridging 5 V and 3.3 V I2C buses in mixed-voltage projects\nBreadboard prototyping with STEMMA QT breakout\n\n\n\nNote: STEMMA QT / Qwiic cable is not included. You will need a compatible JST SH 4-pin cable to connect this board. Adafruit's own QT sensor boards are already 3.3 V and 5 V safe, but many third-party Qwiic devices are not — use this shifter to protect them.\n\n\nResources\n\nWhat is STEMMA QT?\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":1773,"title":"Default Title","sku":"AF-5637","price":6.12,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":103,"option1":"Default Title"}]}