Name: 15x7 CharliePlex LED Matrix FeatherWing - Warm White
Brand: Adafruit
SKU: 3163

Logical pinout · physical placement not verified

3Vsecond from left
FeatherWing power and logic supply. Adafruit Learn states the LED matrix uses only the 3V pin for power and logic.
Type · PowerVoltage · 3.3V Feather rail; Adafruit notes typical current draw around 40mA depending on lit LEDs.
GNDfourth from left
Ground return for the FeatherWing LED matrix. Adafruit Learn states the board uses GND for power and logic.
Type · GroundVoltage · 0V ground reference
SCLto the left of SDA
I2C clock line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SCL must be connected.
Type · I2CVoltage · Feather I2C logic level, used with 3V logic on this FeatherWing
SDArightmost
I2C data line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SDA must be connected.
Type · I2CVoltage · Feather I2C logic level, used with 3V logic on this FeatherWing
ADDR jumper
Address-select solder jumper. Adafruit Learn states the default I2C address is 0x74 and it can be changed to 0x77 by bridging the address jumper.
Type · Control

Pin	Position	Type	Function	Voltage
3V	second from left	Power	FeatherWing power and logic supply. Adafruit Learn states the LED matrix uses only the 3V pin for power and logic.	3.3V Feather rail; Adafruit notes typical current draw around 40mA depending on lit LEDs.
GND	fourth from left	Ground	Ground return for the FeatherWing LED matrix. Adafruit Learn states the board uses GND for power and logic.	0V ground reference
SCL	to the left of SDA	I2C	I2C clock line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SCL must be connected.	Feather I2C logic level, used with 3V logic on this FeatherWing
SDA	rightmost	I2C	I2C data line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SDA must be connected.	Feather I2C logic level, used with 3V logic on this FeatherWing
ADDR jumper		Control	Address-select solder jumper. Adafruit Learn states the default I2C address is 0x74 and it can be changed to 0x77 by bridging the address jumper.

Logical pinout · physical placement not verified

Pin details

5 connections

3V
FeatherWing power and logic supply. Adafruit Learn states the LED matrix uses only the 3V pin for power and logic.
PowerVoltage · 3.3V Feather rail; Adafruit notes typical current draw around 40mA depending on lit LEDs.
second from left
GND
Ground return for the FeatherWing LED matrix. Adafruit Learn states the board uses GND for power and logic.
GroundVoltage · 0V ground reference
fourth from left
SCL
I2C clock line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SCL must be connected.
I2CVoltage · Feather I2C logic level, used with 3V logic on this FeatherWing
to the left of SDA
SDA
I2C data line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SDA must be connected.
I2CVoltage · Feather I2C logic level, used with 3V logic on this FeatherWing
rightmost
ADDR jumper
Address-select solder jumper. Adafruit Learn states the default I2C address is 0x74 and it can be changed to 0x77 by bridging the address jumper.
Control

Start wiring

Shield

Confirm the data interface matches your host board.

Module pins: 3V, GND, SCL, SDA. Schematik maps them to your board in the app.

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