Measure Light and Optical Changes with a Compact Sensor

The Luminosity / Lux / Light TSL2561 Digital Sensor Breakout is a light sensor with i2c designed for light logging, auto-brightness control, and optical sensing. It is a practical fit for makers, students, and engineers who want reliable sensor data in embedded builds.

Key details include Interface: I2C.

Why you’ll love it

• Easy wiring: I2C
• Maker-friendly build: Easy to use in prototypes, classroom projects, and custom electronics
• Common controller support: Works well with Arduino, ESP32, Raspberry Pi, and similar boards
• Project-ready sensing: light logging, optical switching, line tracking, and brightness-aware projects

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What you can build

This sensor is a good fit for light meters, line followers, UV monitors, auto-brightness systems, and optical experiments.

Starter bundles

Pair it with an Arduino-compatible board, ESP32, or Raspberry Pi, plus an I2C cable or jumper wires for quick setup and testing.

Recommended add-ons

Useful add-ons include I2C cables, pull-up friendly boards, OLED displays, and logging modules, depending on how you plan to power, mount, and log the sensor.

Technical specifications

Wiring & usage notes

Connect VCC, GND, SDA, and SCL to your controller. Use the correct board voltage and I2C address in your code.

What’s in the box

1 × Luminosity / Lux / Light TSL2561 Digital Sensor Breakout

Frequently Asked Questions