Serial I2C to LCD Converter Module
The Serial I2C to LCD Converter Module is a compact interface board that enables character LCD displays to communicate through the I2C protocol, significantly reducing the number of microcontroller pins required. Based on the PCF8574 I/O expander, it converts serial I2C data into the parallel signals required by standard HD44780-compatible LCDs, including 16x2 and 20x4 displays. The module features adjustable contrast, configurable I2C addressing, and backlight control. Compatible with Arduino and other microcontroller platforms, it simplifies LCD connections and is ideal for embedded systems, automation projects, educational applications, and DIY electronics.
وحدة Serial I2C to LCD Converter Module هي لوحة تحويل مدمجة تسمح لشاشات LCD النصية بالتواصل عبر بروتوكول I2C، مما يقلل بشكل كبير عدد المنافذ المطلوبة من المتحكم الدقيق. تعتمد الوحدة على شريحة PCF8574 التي تقوم بتحويل بيانات I2C التسلسلية إلى إشارات متوازية مناسبة لشاشات HD44780 مثل شاشات 16×2 و20×4. توفر الوحدة إمكانية ضبط التباين، والتحكم بالإضاءة الخلفية، وتغيير عنوان I2C بسهولة. وهي متوافقة مع Arduino والعديد من المتحكمات الأخرى، مما يجعلها خيارًا مثاليًا للمشاريع الإلكترونية، وأنظمة التحكم، وتطبيقات التعليم، ومشاريع الهواة.
The Serial I2C to LCD Converter Module is an interface board designed to simplify the connection of character LCD displays to microcontrollers. Traditional HD44780-compatible LCD modules require multiple digital pins for operation, whereas this converter allows communication through only two I2C lines: SDA and SCL.
The module is built around the PCF8574 I2C I/O expander, which converts serial I2C commands into the parallel data signals required by the LCD. This significantly reduces wiring complexity and frees up valuable GPIO pins for other functions.
A built-in potentiometer allows easy adjustment of LCD contrast, while a dedicated jumper enables or disables the LCD backlight. The module's I2C address is typically set to 0x3F, but it can be modified through onboard solder jumpers, allowing multiple LCDs to operate on the same I2C bus.
The module is widely used with Arduino, ESP32, STM32, Raspberry Pi, and other embedded systems, making it an essential accessory for character LCD projects.
Specifications
| Parameter | Specification |
|---|---|
| Product Name | Serial I2C to LCD Converter Module |
| Controller IC | PCF8574 |
| Communication Interface | I2C |
| Default I2C Address | 0x3F |
| Operating Voltage | 5V DC |
| Supported LCD Types | HD44780 Compatible |
| Supported LCD Sizes | 16x2, 20x4 and similar |
| Display Interface Mode | 4-Bit Mode |
| Contrast Adjustment | Onboard Potentiometer |
| Backlight Control | Jumper Selectable |
| Address Configuration | Via Solder Jumpers |
| Maximum Devices on I2C Bus | Up to 8 Modules |
| Dimensions | 41.6 mm × 19.2 mm |
| Compliance | RoHS Compliant |
Applications
- Arduino LCD projects
- Embedded system displays
- Industrial control panels
- Home automation systems
- Measurement and monitoring devices
- IoT display interfaces
- Data logging systems
- Educational electronics projects
- Microcontroller-based user interfaces
- DIY electronics applications
- Robotics display systems
- Smart appliance displays