LED Charlieplexed Matrix - 9x16 LEDs - Blue

These are 9x16 Charlieplexed LEDs designed to match with the Adafruit 16x9 Charlieplexed PWM LED Matrix Driver - IS31FL3731. You don't get any resistors or driver chips with this grid, its just a mess of LEDs in a charlieplexed arrangement

VCC
Power input for the IS31FL3731/LED matrix board; Adafruit Learn states the IS31 can be powered from 2.7-5.5 VDC and this voltage is also used for logic.
Type · powerVoltage · 2.7-5.5V DC, same voltage used for power and logic per Adafruit Learn pinouts
GND
Ground reference for power and I2C logic.
Type · groundVoltage · 0V
SDA
I2C data line; connect to the microcontroller I2C SDA pin. Learn page states built-in 20K pullups to VCC.
Type · signalVoltage · logic level follows VCC
SCL
I2C clock line; connect to the microcontroller I2C SCL pin. Learn page states up to 400KHz clock speed and built-in 20K pullups to VCC.
Type · signalVoltage · logic level follows VCC
ADDR / I2C address jumper
I2C address selection jumper/pin; Adafruit Learn states the board can be chained by soldering address jumpers closed to select alternate I2C addresses.

Start wiring

I2C · SPI · 2.7-5.5V DC, same voltage used for power and logic per Adafruit Learn pinouts · 0V

Confirm the data interface matches your host board.

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

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Pin	Type	Function	Voltage
VCC	power	Power input for the IS31FL3731/LED matrix board; Adafruit Learn states the IS31 can be powered from 2.7-5.5 VDC and this voltage is also used for logic.	2.7-5.5V DC, same voltage used for power and logic per Adafruit Learn pinouts
GND	ground	Ground reference for power and I2C logic.	0V
SDA	signal	I2C data line; connect to the microcontroller I2C SDA pin. Learn page states built-in 20K pullups to VCC.	logic level follows VCC
SCL	signal	I2C clock line; connect to the microcontroller I2C SCL pin. Learn page states up to 400KHz clock speed and built-in 20K pullups to VCC.	logic level follows VCC
ADDR / I2C address jumper	configuration	I2C address selection jumper/pin; Adafruit Learn states the board can be chained by soldering address jumpers closed to select alternate I2C addresses.
SDB / shutdown	control	Shutdown pin; Adafruit Learn states it is pulled up to VCC by default and can be connected to ground to put the chip in shutdown mode.	pulled up to VCC by default; ground to shut down

Pinout

Start wiring

Displays

Connectors

Air quality

MCUs and boards