NOYITO MCP23017-E/SS I2C 16-Channel IO Expansion Module - IIC Input Output Board For Arduino & Microcontrollers

About This Product

Alright electronics enthusiasts, if you're running out of IO pins on your Arduino or microcontroller, this NOYITO expansion module is about to save your project. Built around the MCP23017 chip from Microchip, this little board gives you 16 additional IO channels that you can configure as either inputs or outputs. The I2C interface means you only need two wires (plus power) to communicate with all 16 channels, which is perfect for keeping your wiring clean and organized. What's really powerful is the addressability - with 3 address pins, you can connect up to 8 of these modules on the same I2C bus, giving you a massive 128 extra IO channels if you need them. The operating voltage range of 3.0V to 5.5V makes it compatible with most common microcontrollers, and each IO can sink or source up to 25mA, which is enough to drive LEDs or small relays directly. The module supports multiple I2C frequencies including 100KHz, 400KHz, and even 1.7MHz for faster communication when you need it. You can set pull-up resistors on each IO and enable interrupt functionality for inputs, which is super handy for responsive projects. The industrial-grade chip means it can handle temperatures from -40??C to 125??C, making it suitable for pretty much any environment. At 65mm x 19mm, it's compact enough to fit into most projects without taking up much space. Whether you're building a complex robot, an elaborate home automation system, or just need more buttons and LEDs for your prototype, this expansion module delivers professional-grade functionality at a very reasonable price. The documentation is available online too, which makes getting started much easier.