SKU: SENS-3264
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Waveshare LTR390-UV Digital Ultraviolet Sensor Module - I2C Interface, 3.3V/5V

₹979.00 (Inclusive of all taxes)
Out of Stock

The Waveshare LTR390-UV Digital Ultraviolet Sensor Module is a compact I2C expansion board featuring the LTR390-UV-01 sensor for precise measurement of UV index and ambient visible light intensity. It is directly compatible with 3.3V/5V logic systems including Arduino, Raspberry Pi, ESP32, and STM32 platforms.

Features

  • Measures UV Index (UVI) and ambient light intensity (ALS) with high sensitivity.
  • Integrated 16-bit ADC provides direct digital I2C output, minimizing noise interference.
  • On-board level shifter ensures compatibility with both 3.3V and 5V microcontroller systems.
  • Features programmable interrupt output with configurable upper/lower thresholds.
  • Compact 27mm x 20mm PCB with 2.0mm mounting holes for easy integration.

Out of stock

Description

The module is built around the LTR390-UV-01 sensor, a digital UV and ambient light sensor (ALS) with a spectral response from 280nm to 430nm. It converts light intensity directly into digital data via its internal ADC, communicating through a fixed I2C address (0x53). This design eliminates the need for external signal conditioning and provides stable, noise-resistant readings.

Engineered for reliable operation, the board includes a level conversion circuit, making it plug-and-play ready for a wide range of development boards and industrial controllers. Its small form factor and standard mounting holes allow for straightforward installation in portable devices, environmental monitoring stations, or embedded systems requiring UV exposure data.

Key Features

  • Core sensor: LTR390-UV-01 digital UV/Ambient Light Sensor.
  • Measures UV light (280-430nm) and human-visible light (ALS) simultaneously.
  • Direct digital I2C interface with a fixed address of 0x53.
  • Integrated 16-bit analog-to-digital converter for precise light intensity data.
  • Programmable interrupt function with upper and lower threshold settings.
  • On-board 3.3V/5V logic level conversion circuit.
  • Compact PCB dimensions: 27mm x 20mm with 2.0mm mounting holes.
  • Comprehensive development resources including Arduino, Raspberry Pi, and STM32 sample code.

Applications

  • Portable UV index meters and wearable sun exposure monitors.
  • Outdoor environmental stations for measuring solar UV radiation.
  • UV curing process monitoring and germicidal lamp effectiveness validation.
  • Smart agriculture systems monitoring light conditions for plant growth.
  • Embedded systems requiring automatic display brightness adjustment based on ambient UV/light levels.

Technical Specifications

Model / Core SensorLTR390-UV-01
Operating Voltage3.3V to 5V DC
Communication InterfaceI2C (Fixed Address: 0x53)
Spectral Response (UV)280nm - 430nm
Output DataDigital UV Index (UVI) & Ambient Light (ALS)
ADC Resolution16-bit
Board Dimensions27mm x 20mm
Mounting Hole Size2.0mm
Package Weight (approx.)0.006 kg

Frequently Asked Questions

What is the I2C address of this Waveshare UV sensor module?

The module uses the LTR390-UV-01 sensor with a fixed I2C address of 0x53. This address is hard-coded and cannot be changed, so only one module can be used per I2C bus without an external multiplexer.

Is this sensor compatible with both 5V Arduino and 3.3V Raspberry Pi?

Yes. The module includes an on-board level conversion circuit, making it fully compatible with both 3.3V and 5V logic systems. You can connect it directly to the I2C pins of an Arduino Uno (5V), Raspberry Pi (3.3V), ESP32, or STM32 without risk of damage.

What does the sensor actually measure, and what is the output?

The sensor measures two distinct values: Ultraviolet Light Intensity (used to calculate UV Index) and Ambient Light Sensitivity (ALS) for visible light. It outputs raw 16-bit digital values for both channels via the I2C interface, which your microcontroller code converts into meaningful units like UVI or lux.

How do I use the interrupt function on this module?

The LTR390-UV-01 sensor has a programmable interrupt pin. You can set upper and lower threshold values for either UV or ALS readings in the sensor's registers. When the measured light crosses these thresholds, the INT pin on the module goes active, allowing your microcontroller to wake from sleep or respond without constant polling.

Package Includes

  • 1 x Waveshare LTR390-UV Sensor Module
  • 1 x PH2.0 5-pin cable

Additional Information

Weight 0.006 kg
Dimensions 3 × 2.5 × 0.1 cm