Adafruit VCNL4040 Proximity and Lux Sensor – STEMMA QT/Qwiic


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SKU: 1012207
  1. Proximity sensor works from 0mm to 200mm
  2. The light sensor has a range of 0.0125lux to 6553lux
  3. 80ms integration time is 6553.5lux
  4. 640ms integration time is 819.2lux
  5. I2C interface
  6. SparkFun qwiic compatible STEMMA QT connectors


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Brand: Adafruit
Category: Light/color Sensor
Tags: VCNL4040
Adafruit VCNL4040 Proximity and Lux Sensor features a proximity sensor that works from 0mm to 200mm and a light sensor ranging from 0.0125lux to 6553lux. This sensor is placed on a breakout board with support circuitry that allows the board to be used with 5V (Arduino/ Metro328) or 3.3V (Feather/Raspberry Pi) logic levels. The VCNL4040 proximity and lux sensor use an I2C interface to seamlessly connect it up with two wires (plus power and ground). This sensor includes the SparkFun qwiic compatible STEMMA QT connectors for the I2C bus.

The VCNL4040 proximity and lux sensor are capable of adjusting the integration time to set the sensitivity of measurements depending on the lighting conditions. This sensor collects measurements for a short period of time and with an integration time of 80ms, each measurement bit of light represents a larger amount of light. If the integration time is increased, then the sensitivity and resolution within the measurement range also increase.

The VCNL4040 proximity and lux sensor are also capable of changing the current and duty cycle of the IR LED that powers the proximity detection to adjust how sensitive proximity measurements are.

Package Includes:

 1 x Adafruit VCNL4040 Proximity and Lux Sensor – STEMMA QT/Qwiic
SKU: 1012207 Category: Tag:
Proximity Sensor Range

0mm to 200mm

Light Sensor Range

0.0125lux to 6553lux

Communication Interface


Input voltage

3.3 ~ 5

Length (mm):


Width (mm):


Height (mm):


Weight (g):


Shipping Weight 0.005 kg
Shipping Dimensions 3 × 2 × 1 cm
15 Days Warranty

This item is covered with a standard warranty of 15 days from the time of delivery against manufacturing defects only. This warranty is given for the benefit of Robu customers from any kind of manufacturing defects. Replacement will be done against manufacturing defects.

What voids warranty:

If the product is subject to misuse, tampering, static discharge, accident, water or fire damage, use of chemicals & soldered or altered in any way.

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Country Of Origin: United Kingdom (UK)