The IC/I2C Serial Interface Adapter Module is designed to simplify communication between microcontrollers (such as Arduino, Raspberry Pi, and ESP8266) and 16×2 or 20×4 LCD displays using only two I2C pins (SDA, SCL). This module eliminates the need for multiple data pins, making it ideal for projects with limited GPIO availability.
It is based on the PCF8574 I2C expander and features a potentiometer for contrast adjustment and a jumper for backlight control. The module is pre-soldered with an LCD connector, making it easy to attach to standard character LCDs.
Key Features:
- IC Chip: PCF8574 I2C Expander
- Operating Voltage: 5V
- Communication Interface: I2C (SDA, SCL)
- I2C Address: Default 0x27 (Adjustable via solder pads)
- Compatible with: 16×2, 20×4 LCD displays
- Contrast Adjustment: Built-in potentiometer
- Backlight Control: Enable/disable via jumper
- Reduces Pin Usage: Uses only 2 pins instead of 6+
- Pre-soldered LCD Connector for easy installation
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