20×4 2004 LCD Display Module with IIC/I2C Serial Interface Adapter IIC I2C TWI Serial 2004 20×4 LCD Module Shield for Arduino R3

Description

The 20×4 2004 LCD Display Module with IIC/I2C Serial Interface Adapter is the perfect solution for hobbyists, engineers, and makers who need a compact, high‑visibility alphanumeric display for Arduino projects. Designed as a plug‑and‑play shield for the Arduino R3, this 20 × 4 character LCD provides crystal‑clear text, easy I2C communication, and a low‑power footprint, making it ideal for everything from data logging to user‑interface panels.

Key Features

• 20 × 4 character (2004) alphanumeric LCD with built‑in backlight
• Standard IIC/I2C (TWI) serial interface – only two wires (SDA, SCL)
• Fully compatible Arduino R3 shield footprint – no soldering required
• Adjustable contrast via on‑board potentiometer
• Low power consumption – perfect for battery‑operated projects
• Supports both 5 V and 3.3 V logic levels
• Clear, glare‑free display readable in a wide range of lighting conditions

Technical Specifications

• Display type: HD44780 compatible 20 × 4 character LCD
• Interface: I2C (address 0x27 by default, configurable)
• Operating voltage: 5 V (compatible with 3.3 V via level shifting)
• Backlight: White LED, current‑adjustable via potentiometer
• Dimensions: 80 mm × 80 mm × 15 mm (including I2C board)
• Operating temperature: –20 °C to +70 °C
• Typical I2C speed: 100 kHz (standard) – up to 400 kHz (fast mode)

Why Choose This 20×4 LCD Module?

• Simple wiring: Connect only SDA, SCL, VCC, and GND – the Arduino library handles all communication.
• Space‑saving design: The shield form factor fits directly onto the Arduino R3 header, freeing up breadboard space.
• Reliable performance: The HD44780 driver chip ensures stable character rendering and wide library support.
• Versatile applications: Ideal for menus, sensor readouts, status dashboards, and educational kits.
• Cost‑effective: High‑quality components at a competitive price, delivering professional results without breaking the bank.

Compatibility

• Arduino Uno, Mega, Nano, Leonardo, and any board with an Arduino R3 footprint
• Compatible with ESP8266, ESP32, Raspberry Pi (via I2C adapter)
• Works with popular libraries: LiquidCrystal_I2C, Wire, and LCD examples in the Arduino IDE

Installation Guide

1. Align the shield pins with the Arduino R3 header and press gently until fully seated.
2. Connect the I2C bus: SDA → A4 (Uno/Nano) or 20 (Mega), SCL → A5 (Uno/Nano) or 21 (Mega).
3. Power the board via the Arduino’s 5 V pin (or 3.3 V if needed).
4. Upload a sketch using the LiquidCrystal_I2C library, set the correct I2C address, and start displaying text.

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