The 20×4 LCD Display Module is a high-visibility alphanumeric screen capable of displaying up to 80 characters at once across 4 lines and 20 columns. Based on the HD44780 driver, this LCD is commonly used in Arduino, ESP32, Raspberry Pi, PIC, and STM32 projects.
It operates on 5V logic, making it easy to interface with most development boards. The module uses a parallel interface (RS, E, D4-D7), which offers fast communication for smooth and reliable data updates. You can also pair this module with an I2C adapter to simplify wiring and reduce pin usage.
Whether you’re building an industrial control system, sensor monitoring station, or a weather dashboard, the 20×4 LCD offers plenty of space for clear and structured data display.
⭐ Key Features:
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🖥️ 4 rows and 20 columns – can show 80 characters at once
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⚡ 5V operating voltage – directly compatible with Arduino and ESP boards
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🧠 Based on HD44780 controller – widely supported in Arduino libraries
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📟 Displays numbers, letters, symbols, and custom characters
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🔌 Parallel communication (4-bit/8-bit mode) for fast updates
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🔧 Adjustable backlight and contrast (via potentiometer)
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🔄 Ideal for data logging, real-time monitoring, and embedded displays
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🛠️ Compatible with I2C adapters (optional) to save GPIO pins
⚙️ Technical Specifications:
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Display Type: Character LCD
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Screen Size: 20 characters × 4 lines (20×4)
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Driver IC: HD44780 or equivalent
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Operating Voltage: 5V DC
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Interface: Parallel (RS, E, D4-D7, VSS, VDD, RW, etc.)
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Backlight: LED (usually Yellow-Green or Blue with White text)
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Dimensions (approx.): 98mm × 60mm × 14mm
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Viewing Area: ~76mm × 25.2mm
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Compatible Platforms: Arduino, ESP32, Raspberry Pi, STM32, PIC, AVR
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Mounting: 4 mounting holes for stable installation
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