
105-LED 15x7 CharliePlex LED matrix FeatherWing in warm white. Driven by an I2C CharliePlex driver; compatible with all Feather boards.

FeatherWing power and logic supply. Adafruit Learn states the LED matrix uses only the 3V pin for power and logic.
Ground return for the FeatherWing LED matrix. Adafruit Learn states the board uses GND for power and logic.
I2C clock line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SCL must be connected.
I2C data line for IS31FL3731 LED matrix control. Adafruit Learn states all LED control is over I2C and SDA must be connected.
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.
| 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 | signal | 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 | signal | 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 | configuration | 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. |
Shield
Confirm the data interface matches your host board.
Module pins: 3V, GND, SCL, SDA. Schematik maps them to your board in the app.
About 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.
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