4042

LED Indication - Discrete Overview

The Adafruit VCNL4040 is a proximity and ambient light sensor module designed for integration with microcontroller platforms. It operates on I2C interface, supporting both 5V logic (Arduino/Metro328) and 3.3V logic (Feather/Raspberry Pi). The component integrates an infrared LED for proximity detection ranging from 0mm to 200mm and a light sensor covering 0.0125 lux to 6553 lux. Key electrical parameters include an 80ms measurement integration time and support for standard I2C bus communication.

LED Indication - Discrete Feature Summary

• Integrated dual-sensor design combining proximity and ambient light detection in a single compact form factor
• Adjustable measurement sensitivity through configurable integration time and infrared LED current control
• Dual voltage compatibility allowing seamless connection to 5V or 3.3V logic level systems
• Standardized I2C interface with SparkFun qwiic compatible STEMMA QT connector for simplified wiring

LED Indication - Discrete Applications

• Mobile device screen brightness adjustment and proximity sensing
• Wearable terminal human-machine interaction interfaces
• Smart home panel automation controls
• Industrial HMI input detection systems

LED Indication - Discrete Procurement Notes

Verify the specific module variant matches the required logic voltage level (5V vs 3.3V) for your target platform. Confirm the presence of the STEMMA QT connector if quick-connectivity is required. Ensure the I2C address configuration aligns with your system's bus architecture. Check firmware library compatibility for explicit register control rather than generic wrapper dependencies.

LED Indication - Discrete Selection Notes

Select this component when a combined proximity and light sensing solution is needed in a small footprint. It is suitable for applications requiring adjustable sensitivity via integration time settings. Consider the I2C interface requirements and ensure the host controller supports the necessary clock speeds. The integrated infrared LED eliminates the need for external emitters, simplifying PCB layout.

LED Indication - Discrete Part Context

This module is based on the Vishay VCNL4040 optical sensor chip, packaged on a breakout board by Adafruit Industries LLC. The chip integrates an IR emitter, ALS, white channel sensor, and proximity sensor within a QFN-16 package. Adafruit provides the circuitry and connector interface to adapt the bare die for breadboard and prototyping use.

LED Indication - Discrete Replacement Considerations

No direct public substitute part numbers are documented for this specific Adafruit-branded module. Alternative solutions require evaluating standalone VCNL4040 chips or other integrated proximity/light sensors with compatible I2C interfaces and similar operational ranges.