LED Charlieplexed Matrix - 9x16 LEDs - Blue
9x16 Charlieplexed blue LED matrix bare board (no driver, no resistors) designed to pair with the Adafruit IS31FL3731 16x9 Charlieplexed PWM LED Matrix Driver.
Pinout
- 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 · Single data line · 5 V · 3.3 – 5 V · Bare
Confirm the data interface matches your host board.
Module pins: VCC, GND, SDA, SCL. Schematik maps them to your board in the app.
LED displays
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