I2C Serial Interface Adapter Module for LCD Display

The I2C Serial Interface Adapter Module for LCD Display allows easy integration of 16×2 or 20×4 character LCDs with microcontrollers using just two I2C lines (SDA and SCL). It significantly reduces the number of pins required and simplifies wiring, making it ideal for Arduino, ESP8266, Raspberry Pi, and other embedded systems. The module features a PCF8574 I/O expander, adjustable contrast, and backlight control.

Key Features of I2C Serial Interface Adapter Module for LCD Display:

• I2C Protocol: Enables communication with LCDs using only 2 wires (SDA & SCL).
• PCF8574 Chip: I/O expander IC handles LCD control signals.
• Compatible with HD44780 LCDs: Works with standard 16×2 and 20×4 character displays.
• Adjustable Contrast: Includes a potentiometer for precise screen contrast setting.
• Backlight Control: Jumper or software-controllable backlight support.
• Address Configurable: Multiple modules can be used by changing the I2C address jumpers (A0, A1, A2).

Technical Specifications of I2C Serial Interface Adapter Module for LCD Display:

• Chipset: PCF8574T or PCF8574AT
• Interface Type: I2C (SDA, SCL)
• Voltage Supply: 5V DC
• I2C Address Range: 0x20 – 0x27 (Default: 0x27 or 0x3F)
• Backlight: Blue or green LED (depending on LCD)
• Contrast Adjust: Via onboard 10K potentiometer

Mechanical Specifications of I2C Serial Interface Adapter Module:

• Dimensions: Approx. 41mm x 19mm x 12mm
• Connector Pins: 4-pin header (VCC, GND, SDA, SCL)
• Mounting: Fits on back of 1602 or 2004 LCDs via 16-pin header

Dimensions:

• Length: 41mm
• Width: 19mm
• Height: 12mm (with header and potentiometer)

Mounting Options:

• LCD Integration: Solder directly onto 16×2 or 20×4 LCD
• Enclosure Fit: Compact design fits standard LCD mounts

Schematic Diagram, Connection, Wiring and Pinout of I2C LCD Adapter:

• Connection: VCC to 5V, GND to GND, SDA to microcontroller SDA, SCL to microcontroller SCL
• Pinout: VCC, GND, SDA, SCL (4-pin header)
• Jumper Pads: A0, A1, A2 to set I2C address (connect with solder)

Datasheet of I2C Serial Interface Adapter Module for LCD Display:

• Download PCF8574 Datasheet (PDF)

Applications of I2C Serial Interface Adapter Module:

• Embedded Projects: Reduces wiring for microcontrollers and development boards.
• Arduino Projects: Display sensor values and messages with minimal pin usage.
• ESP8266/ESP32: Easily integrates with I2C bus for IoT projects.
• Raspberry Pi: Interfaces LCDs via GPIO I2C bus for HMI projects.
• DIY Meters and Displays: Use in digital voltmeters, clocks, and custom interfaces.

Equivalent of I2C Serial Interface Adapter Module:

• LCM1602: Fully compatible I2C LCD adapter module
• YwRobot I2C Backpack: Alternative design with similar functionality
• Grove I2C LCD Backpack: Plug-and-play option for Grove systems

Package Includes:

• 1 x I2C Serial Interface Adapter Module for LCD Display