CH423S 24 GPIO Expander I2C Module

Model: ESP8266-IR-Blaster
SKU: D22-8-CH423
In Stock
EGP 175.000 Original price was: EGP 175.000.EGP 150.000Current price is: EGP 150.000. exc. vat
In Stock

Compact CH423S IO Expander Module with I2C interface, 3.3V/5V power, and additional digital I/O pins for microcontrollers. Ideal for expanding project capabilities.


Product Description:

Introducing our CH423S IO Expander Module, designed to seamlessly expand your microcontroller’s input/output capabilities. This versatile board is perfect for adding extra digital pins to your projects, making it an essential tool for complex applications and systems requiring numerous I/O connections.

This IO expansion board based on the CH423 chip extends 24 digital ports via I2C, including 8 GPIOs with interrupt functions and 16 GPOs.

CH423 has a built-in current drive circuit that offers a 15mA continuous drive current, which can statically drive 24 LED tubes or dynamically drive 128 LEDs. This CH423 I2C to GPIO IO expander is suitable for projects involving LED tubes, dot matrix screens, light cubes, etc.


  • CH423S Chip: High-performance I/O expander with reliable and efficient operation.
  • Expanded I/O Pins: Provides additional digital I/O pins for your microcontroller.
  • Easy Integration: Compatible with various microcontrollers and development platforms.
  • I2C Interface: Simple and efficient communication using the I2C protocol.
  • Compact Design: Small form factor for easy integration into existing projects.
  • Power Supply: Operates on standard 3.3V or 5V power supply.
  • LED Indicators: Built-in LEDs for power and activity indication.
  • Durable Build: High-quality components ensure long-lasting performance.
  • 8 general input/output pins
  • 16 general output pins
  • Built-in driving circuit, up to 15mA continuous driving current

Technical Specifications:

  • Chip: CH423S
  • I/O Pins: [Number of pins]
  • Interface: I2C
  • Operating Voltage: 3.3V/5V
  • Dimensions: [Dimensions in cm/inches]
  • Weight: [Weight in grams/ounces]


  • Microcontroller projects requiring additional I/O pins
  • Robotics
  • Home automation
  • Industrial control systems
  • Prototyping and development

What’s Included:

  • CH423S IO Expander Module
  • Quick Start Guide

Usage Guide:

  1. Powering the Module:
    • Connect the module to a 3.3V or 5V power supply.
  2. Connecting to a Microcontroller:
    • Use the I2C interface to connect the module to your microcontroller. Ensure proper wiring for SDA and SCL lines.
    • Configure the I2C address as needed (refer to the Quick Start Guide for address configuration).
  3. Programming:
    • Use your development platform to program the microcontroller and interface with the CH423S module.
    • Utilize libraries and example codes available for the CH423S to simplify integration.
    • Requirements

      • Hardware
        • Arduino UNO R3 By UGE (or similar) x 1
        • CH423 I2C 24 Digital IO Expansion Module x 1
        • M-M/F-M/F-F Jumper wires
  4. Expanding I/O:
    • Use the additional digital I/O pins provided by the module to connect sensors, actuators, and other peripherals.
    • Monitor and control the I/O pins through your microcontroller code.

Order your CH423S IO Expander Module today and effortlessly expand your project’s capabilities with additional I/O pins!

Additional information

Weight 0.18 kg
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UGE Electronics

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CH423S 24 GPIO Expander I2C Module Original price was: EGP 175.000.Current price is: EGP 150.000. exc. vat
In Stock