{"title":"Adafruit VCNL4040 Proximity and Lux Sensor - STEMMA QT","handle":"adafruit-vcnl4040-proximity-and-lux-sensor-stemma-qt","url":"/products/adafruit-vcnl4040-proximity-and-lux-sensor-stemma-qt","description":"The Adafruit VCNL4040 is a two-in-one proximity and ambient light sensor from Vishay. It measures proximity from 0 to 200 mm (~7.5 inches) using an on-board IR LED, and ambient light from 0.0125 to 6,553 lux — all over a simple I2C interface.\n\nThe breakout includes 3.3V and 5V level-shifting circuitry for compatibility with both Feather/Raspberry Pi (3.3V) and Arduino/Metro (5V) platforms. Two STEMMA QT / Qwiic connectors provide solderless I2C connection and easy daisy-chaining with other sensors.\n\nKey Features\n\n\nProximity Sensor – 0 to 200 mm range with adjustable IR LED current and duty cycle\n\nAmbient Light Sensor – 0.0125 to 6,553 lux (at 80 ms integration time)\n\nAdjustable Integration Time – 80 ms to 640 ms; longer times increase sensitivity and resolution but reduce maximum lux range (down to 819.2 lux at 640 ms)\n\nI2C Interface – Simple two-wire communication\n\nSTEMMA QT / Qwiic Connectors – Two connectors for solderless plug-and-play wiring\n\n3.3V and 5V Compatible – Built-in voltage regulator and level shifting\n\n\nIdeal For\n\nGesture and proximity detection\nAutomatic display brightness adjustment\nObject detection at short range\nAmbient light monitoring for IoT and environmental sensing\n\n\nPackage Contents\n\n1× Adafruit VCNL4040 Proximity and Lux Sensor Breakout\n\n\n\nNote: STEMMA QT cable not included. Increasing the integration time improves sensitivity but reduces the maximum measurable lux — choose a setting appropriate for your lighting conditions.\n\n\nResources\n\n\nAdafruit VCNL4040 Guide – Wiring, CircuitPython, Python, and Arduino drivers\n","vendor":"Adafruit","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":4996,"title":"Default Title","sku":"AF-4161","price":11.6,"on_sale":false,"in_stock":true,"available_quantity":33,"option1":"Default Title"}]}