Waveshare AW9523B IO Expansion Board for Raspberry Pi/Arduino/STM32,Expands 16 I/O Pins,Allow 4 Boards at The Same Time,Expand Up to 64 Ports,I2C Interface

Support driving 16-ch common anode constant current LED, 256-step linear dimming, current controllable.Output interrupt (INT) signal when changing the state of an input port Onboard voltage translator, compatible with 3.3V/5V level. Provides two connector options: PH2.0 header and/or solder pads, allows multi I2C modules to be stacked I2C address configurable by shorting the A0/A1 jumpers; I2C bus, allows expanding 16 I/O ports by just using two wires Provide online development resources and manual (examples for Raspberry Pi / micro:bit / Ardui / STM32)