Description

I2C Backpack – LCD Interface Adapter for 16×2 & 20×4 Displays

The I2C Backpack is a compact and efficient LCD interface adapter module designed to simplify connections between your Arduino, Raspberry Pi, or ESP boards and character LCDs (16×2 or 20×4). Using the I2C communication protocol, this module reduces the required control pins from 16 to just 2, making it perfect for space-saving projects and clean wiring setups.

This backpack is ideal for both beginners and professionals who want to add text displays to their microcontroller projects without the hassle of complex wiring.

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Specifications:

• Model: I2C Backpack (LCD Interface Adapter)
• Input Voltage: 5V DC
• Interface: I2C (SDA, SCL)
• Chipset: PCF8574 I/O Expander
• Compatibility: 16×2 LCD / 20×4 LCD
• Pins Required: Only 2 (SDA, SCL)
• Adjustable Potentiometer: For LCD contrast control
• Address Selectable: Default address 0x27 (changeable via jumpers)
• Dimensions: Compact and lightweight PCB design

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Uses / Applications:

• Connecting LCD displays to Arduino or Raspberry Pi using I2C
• Ideal for IoT dashboards, data loggers, and sensor display systems
• Used in robotics, smart home, and industrial monitoring projects
• Great for educational electronics kits and STEM learning projects

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Why Choose It:

• Reduces wiring complexity from 16 to 2 pins
• Saves microcontroller I/O pins for other uses
• Compatible with most Arduino LCD libraries (LiquidCrystal_I2C)
• Easy to solder and integrate with existing displays
• Reliable performance for DIY electronics and automation projects