Serial Wombat 18AB I2C/UART GPIO Expander - Unassembled Kit For Arduino & Raspberry Pi (2 Pack)

About This Product

Hey makers and electronics enthusiasts, this Serial Wombat 18AB chip is seriously next-level for your Arduino and Raspberry Pi projects! Think of it as a super-smart co-processor that takes all those complicated I/O tasks off your main board's shoulders.

What makes this thing so cool is that each chip gives you 18 additional I/O pins, and each pin runs its own state machine 1000 times per second. That means you can handle multiple complex tasks simultaneously without bogging down your main microcontroller.

The compatibility is amazing - works with Arduino, Raspberry Pi, PCs, MicroPython boards, pretty much anything that speaks I2C or UART. You can even choose between four different I2C addresses (0x68, 0x69, 0x6A, or 0x6B) if you want to stack multiple chips.

Here's just some of what this beast can do: handle up to 18 servos simultaneously with sub-microsecond precision, decode rotary encoders, read analog inputs with 12-bit resolution, drive WS2812 RGB LEDs, scan matrix keypads, measure pulses and frequencies, and even do capacitive touch sensing through materials!

The Red Label version you get here is calibrated against voltage, resistance and temperature references, which makes your measurements way more accurate - especially temperature readings that can be tricky with standard chips.

You get two chips in this pack, plus custom PCBs you can assemble for different use cases - I2C communication, UART connection via FTDI adapter, or even turn it into an IOT board by adding an ESP-01 module.

There are extensive libraries available for C++ (Arduino), C#, and Python, plus tons of tutorial videos online to get you started. The chip even has a bootloader so you can update the firmware as new features get added.

Whether you're building robots, custom controllers, or complex automation systems, this Serial Wombat chip will make your life so much easier by handling all the nitty-gritty I/O work while your main board focuses on the big picture!

Product Information