The I2C LCD Adapter Module is a compact, easy-to-use interface board that allows you to control standard LCD displays (16×2, 20×4) using only two I2C pins. Powered by the PCF8574 I/O expander, this module significantly reduces the number of required microcontroller pins, making it ideal for Arduino, ESP32, Raspberry Pi, and other embedded systems.

Perfect for students, hobbyists, and robotics developers, this adapter lets you add character displays to your projects quickly and efficiently. With adjustable contrast and switchable backlight, it ensures a clear and customizable display output.

Key Features

• 5V power supply – compatible with most development boards

• PCF8574-based I2C interface for simple serial control

• Backlight ON/OFF jumper to save power when needed

• Contrast adjustment via on-board potentiometer

• Supports up to 8 modules on a single I2C bus

  • Address selection via solder jumpers

• Perfect for 16×2 and 20×4 character LCDs

• Easy connection using a standard 4-pin I2C header

• Reliable, stable, and suitable for robotics and IoT projects

Technical Specifications

• Chipset: PCF8574 / PCF8574T

• Operating Voltage: 5V DC

• Interface: I2C (SCL, SDA)

• Adjustable Contrast: Yes (potentiometer)

• Backlight Control: Jumper enables/disables

• Address Range: 0x20–0x27 (depending on jumper settings)

• Compatibility: Arduino, ESP8266, ESP32, STM32, Raspberry Pi, PIC, AVR, etc.

Applications

• Robotics & Embedded Systems

• Arduino Display Projects

• IoT Dashboards

• DIY Electronics

• Educational/Training Labs

• Real-time display interfaces

• Sensor data monitoring

Why Choose This I2C LCD Adapter?

• Converts any LCD into an I2C-compatible display

• Saves microcontroller pins (only 2 wires needed!)

• Easy to configure and highly reliable

• Ideal for compact and advanced electronics projects

• Great for students, makers, and robotics project