The TSL2561 luminosity sensor is an advanced digital light sensor, ideal for use in a wide range of light situations. Compared to low cost CdS cells, this sensor is more precise, allowing for exact lux calculations and can be configured for different gain/timing ranges to detect light ranges from up to 0.1 - 40,000+ Lux on the fly. The best part of this sensor is that it contains both infrared and full spectrum diodes! That means you can separately measure infrared, full-spectrum or human-visible light. Most sensors can only detect one or the other, which does not accurately represent what human eyes see (since we cannot perceive the IR light that is detected by most photo diodes)

New! As of June 3, 2014 we are shipping a version with a 3.3V regulator and level shifting circuitry so it can be used with any 3-5V power/logic microcontroller.

The sensor has a digital (i2c) interface. You can select one of three addresses so you can have up to three sensors on one board - each with a different i2c address. The built in ADC means you can use this with any microcontroller, even if it doesn't have analog inputs. The current draw is extremely low, so its great for low power data-logging systems. about 0.5mA when actively sensing, and less than 15 uA when in powerdown mode.

Of course, we wouldn't leave you with a datasheet and a "good luck!" - we wrote a detailed tutorial showing how to wire up the sensor, use it with an Arduino and example code that gets readings and calculates lux

Technical Details

  • Approximates Human eye Response
  • Precisely Measures Illuminance in Diverse Lighting Conditions
  • Temperature range: -30 to 80 *C
  • Dynamic range (Lux): 0.1 to 40,000 Lux
  • Voltage range: 2.7-3.6V
  • Interface: I2C
  • This board/chip uses I2C 7-bit addresses 0x39, 0x29, 0x49, selectable with jumpers

Downloads:

  • Datasheet
  • Arduino library and example code on github
    To download. click the DOWNLOADS button in the top right corner, rename the uncompressed folder TSL2561. Check that the TSL2561 folder contains TSL2561.cpp and TSL2561.h
    Place the TSL2561 library folder your /libraries/ folder. You may need to create the libraries subfolder if its your first library. Restart the IDE.
  • PCB layout files - public domain

 


We have a detailed tutorial showing how to wire up the sensor, use it with an Arduino and example code that gets readings and calculates Lux

 

Learn

Low power, digital luminosity (light) sensor
Measure and display light levels.

Light / Luminosity / Lux Digital Sensor Breakout - TSL2561 [439]

  • Brand: Adafruit
  • Product Code: ADA-439
  • Reward Points: 5
  • Availability: 21
  • £6.90

  • Ex Tax: £5.75
  • Price in reward points: 100

  • 5 or more £6.55
  • 10 or more £6.70

Light Sensor - BH1750

Light Sensor - BH1750

£16.24

This is a BH1750 light intensity sensor breakout board with a 16 bit AD converter built-in which can ...

Qty: 5

Light Sensor (Panel Mount) - Grove

Light Sensor (Panel Mount) - Grove

£4.07

Panel mount Light sensor module uses the GL5528 photoresistor to detect the light intensity of the ...

Out Of Stock

Light Sensor - BH1750 (.NET Gadgeteer Compatible)

Light Sensor - BH1750 (.NET Gadgeteer Compatible)

£15.56

This module carries a BH1750, which is a digital ambient light sensor with digital output in Lux ...

Qty: 1

SI1145 Digital UV Index / IR / Visible Light Sensor [1777]

SI1145 Digital UV Index / IR / Visible Light Sensor [1777]

£13.13

The SI1145 is a new sensor from SiLabs with a calibrated UV sensing algorithm that can calculate UV ...

Qty: 6

Light Sensor - Grove

Light Sensor - Grove

£4.33

The Light sensor module uses the GL5528 photoresistor to detect the light intensity of the ...

Out Of Stock

Luminance Sensor (Grove)

Luminance Sensor (Grove)

£7.46

Grove - Luminance Sensor using APDS-9002 as lumens Sensor, provides the linear transforms lumen ...

Qty: 3

Light Sensor - TSL2591 High Dynamic Range Digital Lux Sensor [1980]

Light Sensor - TSL2591 High Dynamic Range Digital Lux Sensor [1980]

£10.74

The TSL2591 luminosity sensor is an advanced digital light sensor, ideal for use in a wide range of ...

Qty: 1

Analog Ambient Light Sensor - TEMT6000

Analog Ambient Light Sensor - TEMT6000

£8.38

A special ambient light detector (TMET6000) with spectral response that closely emulates the human ...

Qty: 1

Analog Light Sensor - LX1972

Analog Light Sensor - LX1972

£5.60

This analog light sensor uses LX1972 as its ambient light sensing part, with spectral response that ...

Qty: 5

Proximity/Light Sensor - VCNL4010 [466]

Proximity/Light Sensor - VCNL4010 [466]

£9.97

The VCNL4010 sensor is a nice way to add a small-distance proximity sensor to your microcontroller ...

Qty: 6

Analog Light Log-scale Sensor - GA1A12S202 [1384]

Analog Light Log-scale Sensor - GA1A12S202 [1384]

£5.27

The biggest improvement over plain photocells is a true log-lin relationship with light levels

Qty: 6

Analog Light Sensor Breakout - ALS-PT19 [2748]

Analog Light Sensor Breakout - ALS-PT19 [2748]

£4.00

The ALS PT19 analog light sensor is a great way to upgrade a project that uses a photocell and needs ...

Qty: 6