Easily add a few more I/O or A/D channels to your project through I2C Do complex tasks with a few simple calls to the API available for download through the IDE Library Manager Many support videos and extensive documentation available online. See the User Guide pdf in the "Product guides and documents" at the bottom of this lisiting 3 Input/Output and 1 Input Only pin on each chip. Each pin can be assigned a specific function such as Servo, Quadrature Encoder, A/D conversion, UART Bridge Use all 4 chips together, or in 4 different projects. 100nF capacitors included. Uncut decal strip with 8 decals included. Upgradable Open Source Firmware available on GitHub. The Serial Wombat smart I/O expander is compatible with Arduino, Raspberry Pi, CircuitPython, native embedded systems, or any other system that can communicate by I2C. The Serial Wombat 4B provides 3 Input/Output pins and one Input-Only pin each capable of running an independent state machine every millisecond to perform smart operations. Communications use a simple I2C protocol at up to 400kbps. This kit includes four preprogrammed Serial Wombat 4B chips with I2C addresses 0x6C, 0x6D, 0x6E and 0x6F. You can change the address using a sketch in the Library Examples. Input Pin Modes: -Pulse Measurement -- Pulse Measurement with 8uS resolution -Debounced Input -- Debounce switches while monitoring transitions and key press time -Quadrature Decoder - Combine 2 input pins to decode rotary encoder signals Input/Output Pin Modes:
-Analog Input (10 bit with filtering, averaging, Min/Max tracking) -Servo Output (1uS pulse resolution) -PWM Output (10 bit at selectable frequencies) Watchdog -- Reset the host if it freezes
-Protected Output -- Shut off output if fault detected -I2C->UART bridge