The Adafruit Right Angle VEML7700 Lux Sensor is an I2C ambient light sensor that measures calibrated lux values rather than arbitrary brightness numbers. Its unique right-angle orientation senses light coming parallel to the PCB surface rather than perpendicular — ideal for edge-lit enclosures and side-mounted installations.

The VEML7700 provides 16-bit dynamic range for ambient light detection from 0 lux to approximately 120 klux, with resolution down to 0.0036 lx/ct. Gain and integration times are software-adjustable for different lighting conditions.

Key Features

• Right-Angle Sensing – Detects light parallel to the PCB surface, unlike most top-facing sensors
• Calibrated Lux Output – Returns SI lux values for consistent, meaningful readings across sensors
• 16-Bit Dynamic Range – 0 to ~120,000 lux with 0.0036 lx/ct resolution
• I2C Interface – Simple two-wire connection with STEMMA QT / Qwiic connectors for solderless hookup
• Software-Adjustable – Configurable gain and integration time
• Wide Compatibility – Arduino and CircuitPython libraries available; works with microcontrollers and SBCs including Raspberry Pi

Ideal For

• Ambient light measurement in enclosures with side-mounted sensors
• Automatic display brightness adjustment
• Environmental monitoring and data logging
• Smart lighting and energy management systems

Package Contents

• 1× Adafruit Right Angle VEML7700 Lux Sensor Breakout

Resources

• STEMMA QT Overview
• Arduino Library (GitHub)
• CircuitPython Library (GitHub)