STEMMA - TSL2561 Digital Lux / Light
Sensor
PRODUCT ID: 3611
Description
New from Adafruit, we are taking our most popular sensors and making them easier than ever to use!
This is the Adafruit STEMMA TSL2561 which takes our favorite lux sensor and gives you two ways to
play: you can use alligator clips to connect the sensor to your Flora, Gemma or Circuit Playground, or
plug‐n‐play with STEMMA cables or Seeed Grove cables
Each STEMMA board has level‐shifting and protection circuitry on the power supply and data lines so
you can design with no worries about incompatibilities or accidents.
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)
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 use it with an Arduino and example code that gets readings and calculates lux
https://cdn‐learn.adafruit.com/downloads/pdf/tsl2561.pdf
Technical Details
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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 (default), 0x29, 0x49, selectable with
jumpers
We have a detailed tutorial showing how to use it with an Arduino and example code that gets readings
and calculates Lux https://cdn‐learn.adafruit.com/downloads/pdf/tsl2561.pdf
Product Dimensions: 25.8mm x 25.8mm x 7.3mm / 1.0" x 1.0" x 0.3"
Product Weight: 2.0g / 0.1oz
https://www.adafruit.com/product/3611 9‐15‐17
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