Gravity: CH423 I2C 24 Digital IO Expansion Module

This IO expansion board, utilizing the CH423 chip, significantly enhances your project capabilities by extending 24 digital ports over the I2C protocol. Included are 8 General-Purpose Input/Output (GPIO) ports with interrupt functions, enabling efficient communication and control over peripherals. Additionally, it features 16 General-Purpose Output (GPO) ports to further expand your application's potential.

The board's CH423 chip boasts a built-in current drive circuit that continuously delivers a 15mA drive current. This allows for static operation with 24 LED tubes or dynamic driving of up to 128 LEDs, making it particularly efficient for LED-intensive projects. Applications such as LED matrices, dot matrix displays, and light cubes will benefit from the robust functionality offered.

Installation is straightforward, incorporating an I2C interface for easy integration with microcontrollers. For example, connect the expansion board to a microcontroller to control a series of LEDs in a dynamic display pattern. This seamless connection highlights the board's versatility in a variety of electronics projects, enhancing both functionality and control within compact spaces.