VEML7700 Ambient Light Intensity Sensor Module (I2C) | ATMOSFÆR ENGINEERING

High-accuracy digital ambient light sensor with wide dynamic range for measuring light intensity from complete darkness to bright sunlight. Features Filtron™ technology for human eye-like spectral response and 16-bit resolution. I2C interface with low power consumption. Ideal for automatic display brightness control, smart lighting, photography light meters, and environmental monitoring applications.

Technical Specifications:

• Sensor IC: Vishay VEML7700
• Interface: I2C (Gravity compatible connector)
• Operating Voltage: 3.3V - 5V
• Working Current: 45µA (active), 0.5µA (shutdown)
• Measurement Range: 0 - 120,000 lux (0 - 167k lux with BH1750 comparison: 0 - 65k lux)
• Resolution: 0.0036 lux/count (16-bit ADC)
• Accuracy: ±0.005 lux/count (high precision)
• Spectral Response: Filtron™ technology (matches human eye sensitivity)
• Output Tolerance: <10% variation
• Operating Temperature: -25°C to +85°C
• I2C Address: Programmable (default varies by module)
• Response Time: Fast (configurable integration time)

Light Level Reference:

• Night: 0.001 - 0.02 lux
• Moonlit night: 0.02 - 0.3 lux
• Cloudy indoor: 5 - 50 lux
• Cloudy outdoor: 50 - 500 lux
• Indoor on sunny day: 100 - 1,000 lux
• Summer noon (direct sun): ~100,000 lux
• Reading light: 50 - 60 lux

Features:

• Wide dynamic range (0 - 120k lux)
• High accuracy (0.0036 lux resolution)
• Filtron™ technology for human eye spectral matching
• 0-Trim™ technology for <10% output variation
• Ultra-low power consumption (45µA active)
• 16-bit digital output
• I2C interface with Gravity connector
• Programmable integration time and gain
• Temperature-compensated readings

Filtron™ Technology:

• Spectral sensitivity closely matches human eye perception
• Accurate lux measurement for display applications
• Better color temperature compensation than standard photodiodes

Applications:

• Automatic display brightness adjustment (phones, tablets, laptops)
• Smart lighting systems and home automation
• Photography light meters
• Environmental monitoring stations
• Greenhouse and plant growth monitoring
• Security lighting control (dusk-to-dawn sensors)
• Power-saving automatic backlighting
• Weather stations
• Museum and gallery lighting monitoring

Pin Configuration:

• VCC: Power supply (3.3V - 5V)
• GND: Ground
• SDA: I2C data
• SCL: I2C clock

Advantages:

• Much wider range than BH1750 (120k vs 65k lux)
• Higher resolution for low-light detection
• Human eye spectral response (better for display applications)
• Very low power consumption
• Gravity connector for easy breadboard use

Compatible with Arduino, ESP32, Raspberry Pi, STM32, and any microcontroller with I2C support. Libraries available for easy lux reading.