Adafruit TSL2591 High Dynamic Range Digital Light Sensor

TSL2591 ambient light sensor measuring both full-spectrum and infrared channels via I2C; lux range 188µlux to 88,000 lux with 600,000,000:1 dynamic range. Accepts 3.3–5V via onboard regulator. Draws ~0.4mA active.

Logical pinout · physical placement not verified

VinPower header pad
Power input from the Adafruit Learn pinouts page, use 3V for a 3V microcontroller or 5V for a 5V microcontroller.
Type · PowerVoltage · 3-5V
3VoPower header pad
3.3V regulator output from the Adafruit Learn pinouts page.
Type · PowerVoltage · 3.3V output, up to 100mA
GNDPower/header ground pad
Common ground for power and logic from the Adafruit Learn pinouts page.
Type · GroundVoltage · 0V
SCLI2C header/STEMMA QT clock contact
I2C clock pin, connect to the microcontroller I2C clock line according to Adafruit Learn.
Type · I2C
SDAI2C header/STEMMA QT data contact
I2C data pin, connect to the microcontroller I2C data line according to Adafruit Learn.
Type · I2C
INTInterrupt header pad
Interrupt output from the TSL2591 sensor; Adafruit Learn says it can be programmed for conversion or light-change events, with no library support noted.
Type · GPIO

Pin	Position	Type	Function	Voltage
Vin	Power header pad	Power	Power input from the Adafruit Learn pinouts page, use 3V for a 3V microcontroller or 5V for a 5V microcontroller.	3-5V
3Vo	Power header pad	Power	3.3V regulator output from the Adafruit Learn pinouts page.	3.3V output, up to 100mA
GND	Power/header ground pad	Ground	Common ground for power and logic from the Adafruit Learn pinouts page.	0V
SCL	I2C header/STEMMA QT clock contact	I2C	I2C clock pin, connect to the microcontroller I2C clock line according to Adafruit Learn.
SDA	I2C header/STEMMA QT data contact	I2C	I2C data pin, connect to the microcontroller I2C data line according to Adafruit Learn.
INT	Interrupt header pad	GPIO	Interrupt output from the TSL2591 sensor; Adafruit Learn says it can be programmed for conversion or light-change events, with no library support noted.

Logical pinout · physical placement not verified

Pin details

6 connections

Vin
Power input from the Adafruit Learn pinouts page, use 3V for a 3V microcontroller or 5V for a 5V microcontroller.
PowerVoltage · 3-5V
Power header pad
3Vo
3.3V regulator output from the Adafruit Learn pinouts page.
PowerVoltage · 3.3V output, up to 100mA
Power header pad
GND
Common ground for power and logic from the Adafruit Learn pinouts page.
GroundVoltage · 0V
Power/header ground pad
SCL
I2C clock pin, connect to the microcontroller I2C clock line according to Adafruit Learn.
I2C
I2C header/STEMMA QT clock contact
SDA
I2C data pin, connect to the microcontroller I2C data line according to Adafruit Learn.
I2C
I2C header/STEMMA QT data contact
INT
Interrupt output from the TSL2591 sensor; Adafruit Learn says it can be programmed for conversion or light-change events, with no library support noted.
GPIO
Interrupt header pad

Start wiring

I2C · Analog · 3.3 – 5 V · Breakout

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Module pins: Vin, GND, SCL, SDA. Schematik maps them to your board in the app.

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