MCP23017 IO Expansion Board - 16 I/O Pins For Raspberry Pi, Arduino, STM32 With I2C Interface

About This Product

Hey makers and tinkerers! If you've ever run out of GPIO pins on your Raspberry Pi, Arduino, or STM32 board, this MCP23017 IO expansion module is about to become your new best friend. Seriously, this little board is pure genius - it takes just 2 signal pins from your I2C bus and expands them into 16 full I/O pins. But wait, it gets better - you can actually chain up to 8 of these boards together to get a massive 128 I/O ports! The I2C addresses are easily configurable by shorting the A0, A1, and A2 jumpers, so setting up multiple boards is super straightforward. What's really handy is the onboard voltage translator that makes it compatible with both 3.3V and 5V systems - no more worrying about frying your precious Raspberry Pi. You get two connection options with the PH2.0 terminals and solder pads, which is perfect whether you prefer plug-and-play or permanent installations. The board measures just 38mm x 23mm, so it's tiny enough for even the most compact projects. They include a 20cm 6-pin cable and comprehensive online documentation with examples for Raspberry Pi, micro:bit, Arduino, and STM32. Setting up interrupts with the INTA and INTB pins is a breeze too. Whether you're building a complex robot, a home automation system, or just need more pins for your LEDs and sensors, this expansion board delivers exactly what you need. It's one of those components that seems simple but seriously expands what you can do with your projects without breaking the bank!

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