SKU: SENS-1645
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Pimoroni LTR-559 Light & Proximity Sensor Breakout Module - I2C Interface, 0.01-64k Lux

₹949.00 (Inclusive of all taxes)
Out of Stock

The Pimoroni LTR-559 breakout module integrates a high-performance Lite-On LTR-559ALS-01 sensor, providing precise ambient light sensing from 0.01 to 64,000 lux and proximity detection up to ~5cm via a standard I2C interface. It is 3.3V/5V logic compatible and designed for direct plug-and-play integration with Raspberry Pi GPIO and the Breakout Garden ecosystem.

Features

  • Lite-On LTR-559ALS-01 sensor with integrated IR/UV filtering for accurate ambient light measurement.
  • Wide dynamic range from 0.01 lux (dark) to 64,000 lux (bright sunlight).
  • Integrated proximity sensing with a typical detection range of approximately 5cm.
  • Standard I2C interface (address 0x23) with 50/60Hz flicker rejection for stable operation.
  • 3.3V or 5V compatible design with reverse polarity protection and Raspberry Pi-optimized pinout.

Out of stock

Description

The LTR-559 breakout module utilizes the same advanced optical sensor technology found in smartphones for ambient light and proximity sensing. The sensor combines a photodiode for light sensing and an integrated IR LED for proximity detection, all housed within a compact, surface-mount package with an optical filter to block infrared and ultraviolet light, ensuring accurate visible light measurements.

Communication is handled via a simple I2C interface, making it easy to integrate with microcontrollers like the Raspberry Pi, Arduino, ESP32, and STM32. The module includes built-in signal conditioning and reverse polarity protection, providing a robust and reliable sensing solution for automated lighting control, display dimming, and gesture-based user interfaces.

Key Features

  • High-performance LTR-559ALS-01 sensor from Lite-On.
  • Dual-functionality: precise ambient light sensing and proximity detection.
  • Integrated optical filter eliminates IR/UV interference for accurate lux readings.
  • Built-in 50/60Hz AC flicker immunity for stable operation under artificial lighting.
  • Wide supply voltage compatibility (3.3V to 5V DC) with reverse polarity protection.
  • Compact 19mm x 19mm PCB footprint with pre-soldered connectors.
  • Direct plug-and-play compatibility with Raspberry Pi GPIO (pins 1, 3, 5, 7, 9).
  • Designed for seamless use with the Pimoroni Breakout Garden system.

Applications

  • Automatic display backlight dimming and brightness control for Raspberry Pi or embedded systems.
  • Proximity-activated touchscreen locking/unlocking in custom kiosks or interactive displays.
  • Ambient light-triggered nightlights or smart lighting systems using GPIO control.
  • Gesture-based control interfaces for robotics and IoT projects using proximity sensing.
  • Environmental data logging systems monitoring light levels for plant growth or workspace analysis.

Technical Specifications

Sensor ModelLite-On LTR-559ALS-01
Primary FunctionAmbient Light & Proximity Sensing
Light Sensing Range0.01 to 64,000 Lux
Proximity Detection Range~5 cm (typical)
Communication InterfaceI2C
I2C Address0x23
Operating Voltage3.3V to 5V DC
Special FeaturesIR/UV Filtering, 50/60Hz Flicker Rejection, Reverse Polarity Protection
Module Dimensions (L x W)19 mm x 19 mm
CompatibilityRaspberry Pi (all models), Arduino, ESP32, STM32, Breakout Garden

Frequently Asked Questions

What is the I2C address of the LTR-559 breakout module?

The module uses a fixed I2C address of 0x23. This address is hardcoded by the Lite-On LTR-559ALS-01 sensor IC and cannot be changed. Ensure your microcontroller code is configured to communicate with this specific address for both light and proximity data reading.

Is this sensor compatible with 5V Arduino boards?

Yes, the breakout is fully compatible with both 3.3V and 5V logic systems. It includes level-shifting circuitry, allowing safe operation with 5V Arduino boards like the Uno or Mega. The power supply (VCC) can be connected to either a 3.3V or 5V source, and the I2C signals are tolerant of the higher voltage.

How do I connect this module to a Raspberry Pi?

The module is designed for direct connection to the bottom-left 5 pins of the Raspberry Pi GPIO header (pins 1, 3, 5, 7, 9). Solder the provided right-angle female header to the breakout and plug it directly onto these pins. This connects VCC (3.3V), GND, SDA, and SCL. No additional wiring or resistors are required.

What is the typical range for proximity detection?

The integrated proximity sensor has a typical detection range of approximately 5 centimeters. This range is suitable for applications like hand-wave detection or presence sensing. The actual range can be slightly affected by the reflectivity of the target object and ambient infrared light conditions.

Does the module filter out infrared light?

Yes, the LTR-559ALS-01 sensor includes an integrated optical filter that blocks both infrared (IR) and ultraviolet (UV) light. This filtering ensures that the lux readings correspond accurately to visible light levels, preventing inaccurate measurements from common IR sources like sunlight or incandescent bulbs.

Package Includes

  • 1 x Pimoroni LTR-559 Light & Proximity Sensor Breakout Module
  • 1 x 5-Pin Male Header (Straight)
  • 1 x 5-Pin Female Right-Angle Header

Additional Information

Weight 0.05 kg
Dimensions 1.9 × 1.9 cm