Description
The IIC/I2C PCF8574 Serial Interface Adapter Module is a convenient expansion board designed to convert standard parallel LCD displays into I2C-compatible displays.
Using the PCF8574 I/O expander chip, this module allows LCD1602 and LCD2004 character displays to communicate through the I2C interface, requiring only two signal lines (SDA and SCL) instead of multiple parallel data connections.
This significantly reduces wiring complexity and frees up valuable GPIO pins on microcontrollers such as Arduino, ESP32, Raspberry Pi, STM32, and other development boards.
The module features an onboard contrast adjustment potentiometer for easy display tuning and supports multiple I2C addresses, making it suitable for projects using more than one display.
Its compact design and easy installation make it an essential accessory for electronics enthusiasts, students, makers, and engineers working on display-based projects.
Key Features
- Based on PCF8574 I/O expander chip
- Converts parallel LCDs to I2C communication
- Uses only SDA and SCL pins
- Compatible with LCD1602 and LCD2004 displays
- Adjustable LCD contrast control
- Multiple configurable I2C addresses
- Reduces wiring complexity
- Easy installation and setup
Technical Specifications
- Chipset: PCF8574
- Communication Interface: IIC / I2C
- Operating Voltage: 5V DC
- Supported Displays: LCD1602, LCD2004, and HD44780-compatible LCDs
- Address Configuration: Adjustable via onboard jumpers
- Communication Pins: SDA, SCL
- Contrast Adjustment: Onboard potentiometer
- Mounting Type: LCD back-mount adapter
- Compatibility: Arduino, ESP32, Raspberry Pi, STM32, AVR, PIC, and other microcontrollers
Package Includes
- 1 × IIC/I2C PCF8574 Serial Interface Adapter Module
Applications
- Arduino display projects
- ESP32 and IoT systems
- LCD1602 and LCD2004 displays
- Embedded systems
- Robotics projects
- Home automation systems
- Educational electronics projects
Benefits
- Saves microcontroller GPIO pins
- Simplifies LCD wiring
- Easy integration into projects
- Adjustable display contrast
- Reliable and stable communication
- Ideal for beginners and professionals
Why Choose This I2C LCD Adapter?
The PCF8574 IIC/I2C Serial Interface Adapter Module is the easiest way to connect LCD displays to your microcontroller while minimizing wiring and pin usage. Its reliable performance, simple installation, and broad compatibility make it an essential accessory for Arduino, ESP32, Raspberry Pi, and embedded electronics projects.
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