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LCD 20x4 Display with I2C Interface
₹270.0
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The LCD 20x4 Display with I2C interface is a versatile alphanumeric display module capable of showing 20 characters per line across 4 lines. With the I2C (Inter-Integrated Circuit) adapter already integrated, it simplifies wiring by reducing the required pins from 16 to just 2 (SDA & SCL). This makes it an excellent choice for projects using Arduino, Raspberry Pi, ESP32, ESP8266, and other microcontrollers. It provides a clear, bright, and easy-to-read display for projects involving data output, menus, and real-time status monitoring.
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Product Specifications
| Specification | Details |
|---|---|
| Display Type | 20x4 Alphanumeric LCD |
| Controller IC | HD44780 or compatible |
| Interface | I2C (using PCF8574 I2C backpack) |
| Communication Pins | SDA & SCL |
| Supply Voltage | 5V DC (some models compatible with 3.3V) |
| Current Consumption | ~2mA (without backlight), ~20mA (with backlight) |
| Character Size | 5x8 dots matrix |
| Adjustable Contrast | Via onboard potentiometer |
| Backlight | LED |
| Dimensions | ~98mm x 60mm x 14mm |
Key Features
- 20 characters × 4 lines for large data display
- I2C interface reduces wiring complexity (only 2 pins needed)
- Compatible with Arduino, Raspberry Pi, ESP32, STM32, and other microcontrollers
- Bright backlight with adjustable contrast for better visibility
- Pre-soldered I2C adapter (PCF8574 IC) for plug-and-play use
- Low power consumption, suitable for portable projects
- Easy integration using popular libraries (LiquidCrystal_I2C, etc.)
Applications
- DIY electronics and embedded systems projects
- IoT devices for displaying sensor data
- Industrial control panels and instrumentation
- Robotics for showing system status and menus
- Educational projects and prototyping
- Home automation system displays
- Data logging and monitoring systems
Frequently Asked Questions
Only 2 pins (SDA & SCL), in addition to VCC and GND.
Yes, you can adjust contrast using the onboard potentiometer, and the backlight can be turned on or off via software.
The popular LiquidCrystal_I2C library is commonly used to interface with this display.
It is compatible with Arduino, Raspberry Pi, ESP32, ESP8266, STM32, and most boards supporting I2C communication.
No, the display comes with a pre-soldered I2C backpack module.
