LCD1602 16×2 Character LCD Display with I2C Adapter — Blue Backlight

LCD1602 16×2 Character LCD Display with I2C Adapter — Blue Backlight

The LCD1602 with I2C adapter is the most popular text display for Arduino projects — a 16-character × 2-line HD44780 character LCD with a PCF8574 I2C backpack pre-soldered. Display text, numbers, and custom characters using only 2 wires (SDA + SCL) instead of the 6–8 wires required by a standard LCD. Blue backlight with white characters for excellent readability.

Key Specifications

• Display: 16 characters × 2 lines | Controller: HD44780
• Interface: I2C via PCF8574 | I2C address: 0x27 (default, adjustable)
• Supply: 3.3–5V | Backlight: Blue with white characters
• Contrast: Adjustable via on-board potentiometer
• Library: LiquidCrystal_I2C (Arduino)
• Compliance: RoHS compliant

Why I2C LCD?

• ✅ Only 2 wires — SDA + SCL vs 6–8 wires for standard LCD, freeing Arduino pins
• ✅ LiquidCrystal_I2C library — display text in 5 lines of Arduino code
• ✅ Adjustable I2C address — use up to 8 displays on one I2C bus
• ✅ Pre-soldered I2C backpack — ready to use, no soldering required
• ✅ Blue backlight — excellent readability in all lighting conditions

Typical Applications

• Arduino project status and data display
• Temperature, humidity, and sensor data readout
• Menu navigation display for Arduino projects
• Clock and timer display
• Serial monitor replacement for standalone projects

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