LCD 20×4 Character Module Blue

Display clear, readable text output in your embedded project with this 2004 20×4 Character LCD, a white-on-blue display module built around the industry-standard HD44780 controller. Offering 4 rows of 20 characters each, this display gives you significantly more room than a typical 16×2 screen, making it well suited for menus, status messages, sensor readouts, and multi-line data output.

The HD44780 interface is one of the most widely supported LCD standards in the hobbyist world, with sample code and libraries available for virtually every microcontroller platform, including Arduino, Raspberry Pi, PIC, and STM32. A built-in contrast adjustment potentiometer input lets you fine-tune the display for optimal readability under different lighting conditions, while the yellow-green LED backlight provides consistent visibility in typical indoor environments. The 16-pin parallel interface connects directly to GPIO pins, though the display can also be paired with an I2C backpack module separately to reduce the number of wires needed for connection.

This LCD is a popular choice for hobbyists and makers building weather stations, clocks, environmental monitors, menu-driven control panels, and other embedded projects where a compact text display keeps the user informed without needing a full graphical screen. It’s also commonly used in student projects, DIY test equipment, and general prototyping where straightforward, reliable text output matters more than graphics.

Specification:

• Display Format : 20 Characters x 4 Lines
• Controller : HD44780 (or Compatible)
• Backlight Color : Blue
• Interface : 16-Pin Parallel
• Supply Voltage : 5V DC
• Contrast Control : Potentiometer Adjustable