Price: ₹900 - ₹650.00
(as of Oct 02, 2026 06:23:48 UTC – Details)
20×4 Character LCD Display Module with I2C Serial Interface Adapter
The 20×4 Character LCD Display Module with I2C Serial Interface Adapter is a high-readability alphanumeric display solution designed for embedded systems, monitoring panels, robotics, and electronic prototypes. Featuring a high-contrast blue background with white characters, this display presents up to 80 characters simultaneously across 20 columns and 4 lines.
Equipped with a detachable PCF8574-based I2C adapter daughterboard, this module simplifies wiring by reducing the required pin connections from 16 parallel pins down to just 2 I2C signal wires (SDA and SCL). The integrated adapter board includes a built-in contrast adjustment potentiometer and a jumper header to toggle the LED backlight on or off, making it energy efficient and extremely easy to interface with various microcontrollers and development boards.
Key Features
- 20 Columns by 4 Lines Display Capacity: Shows up to 80 characters simultaneously with high visual clarity.
- I2C Serial Communication: Utilizes 2-wire I2C protocol (SDA/SCL) to save valuable GPIO pins on processing boards.
- Integrated Contrast Control: Onboard multiturn trimmer resistor allows precise calibration of screen text contrast.
- High-Contrast Blue Backlight: Features a bright LED blue background with sharp white text for easy viewing.
- Adjustable Backlight Jumper: Removable jumper cap permits manual turning off of the display backlight to conserve power.
Technical Specifications
- Display Format: 20 Characters x 4 Lines (2004 LCD)
- Screen Backlight & Text: Blue Backlight / White Characters
- Interface Protocol: I2C / IIC Serial Interface (PCF8574 Controller)
- Operating Voltage: 5V DC
- Default I2C Address: 0x27 or 0x3F (Selectable via solder bridges A0, A1, A2)
- Pinout Connections: VCC, GND, SDA, SCL
- Module Dimensions: Approx. 98 mm x 60 mm x 20 mm
Applications
- System Monitoring Panels, Sensor Data Displays, and Weather Stations
- Digital Timers, Frequency Counters, and Automation Enclosures
- Educational Electronics Labs, Microcontroller Training, and STEM Projects
Package Contents
- 1 × 20×4 Blue Backlight LCD Display Module
- 1 × I2C Interface Adapter Board
📺 LARGE 20×4 CHARACTER DISPLAY: Displays up to 80 characters (20 columns x 4 rows) simultaneously with high contrast white text on a blue backlight.
🔌 I2C SERIAL INTERFACE SAVES PINS: Included I2C adapter reduces control lines from 16 parallel pins to just 2 I2C pins (SDA/SCL) for clean circuit wiring.
🎚️ ONBOARD CONTRAST ADJUSTMENT: Integrated blue potentiometer on the adapter board allows quick manual tuning of text clarity and screen contrast.
💡 ENERGY-SAVING BACKLIGHT JUMPER: Built-in LED jumper pin enables software or hardware toggling of the backlight to reduce power usage in battery setups.
⚡ 5V DC OPERATING VOLTAGE: Operates smoothly on standard 5V power supply rails compatible with standard microcontroller development platforms.
🛠️ VERSATILE EMBEDDED DISPLAY: Ideal for displaying real-time sensor data, system status, menu navigation, and DIY STEM robotics projects.
