LCD2004 20×4 Character LCD Display Module (Blue Backlight)

The LCD2004 20×4 Character LCD Display Module is a widely used alphanumeric display built around the industry-standard HD44780 controller, capable of showing 20 characters across 4 lines. Its crisp white-on-blue display and simple parallel interface make it a dependable choice for menus, sensor readouts, and status screens in Arduino and embedded projects.

Key features:

• HD44780 Controller: Industry-standard driver chip supported by nearly every microcontroller LCD library.
• 20×4 Character Grid: Displays up to 80 characters at once across four rows of twenty.
• Blue Backlight: White characters on a blue background with an onboard potentiometer for contrast adjustment.
• Standard 16-Pin Interface: Works in 4-bit or 8-bit parallel mode, and accepts an I2C backpack for a 2-wire connection.
• Wide Compatibility: Drop-in support for Arduino, STM32, Raspberry Pi, and other common microcontroller platforms.

This display suits data loggers, weather stations, menu-driven devices, and any project that has outgrown a smaller 16×2 screen.