I2C Module for LCD Display - Serial Interface Adapter

Simplify your LCD connections with this I2C serial interface adapter module. Transform your standard parallel LCD display into an easy-to-use I2C device, reducing wiring from 16 pins down to just 4. Perfect for Arduino and microcontroller projects where GPIO pins are precious.

Technical Specifications

• Interface: I2C/IIC serial communication
• Chip: PCF8574T I/O expander
• Compatible LCDs: 1602, 2004, and other HD44780-based character LCDs
• Operating Voltage: 5V DC
• I2C Address: 0x27 or 0x3F (adjustable via jumpers)
• Connections: 4 pins (VCC, GND, SDA, SCL)
• Backlight Control: Built-in jumper for backlight on/off

Key Features

• Pin Saver: Reduces LCD connections from 16 pins to just 4 I2C pins
• Easy Wiring: Simple 4-wire connection (VCC, GND, SDA, SCL)
• Contrast Adjustment: Built-in potentiometer for display contrast control
• Backlight Control: Jumper to enable/disable LCD backlight
• Pre-Soldered: Comes ready to attach to your LCD (or easy to solder)
• Arduino Compatible: Works with Arduino, ESP8266, ESP32, Raspberry Pi
• Library Support: Compatible with LiquidCrystal_I2C library
• Space Efficient: Compact PCB mounts directly on LCD back

Applications

Perfect for Arduino projects with limited pins, IoT displays, sensor readout systems, home automation interfaces, robotics displays, weather stations, and any project using 1602 or 2004 character LCD displays where simplified wiring is desired.