Pololu
20x4 Character LCD with LED Backlight (Parallel Interface), White on Blue
This white-on-blue 20×4 character LCD adds a clear, easy-to-read display to your electronics projects. With four rows of 20 characters, it provides plenty of...
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This white-on-blue 20×4 character LCD adds a clear, easy-to-read display to your electronics projects. With four rows of 20 characters, it provides plenty of space for sensor readings, menus, status messages, and more.
The display uses the industry-standard HD44780 parallel interface, making it compatible with a wide range of microcontrollers and existing library code. An LED backlight ensures readability in dim lighting conditions.
Key Features
- 20×4 Character Display – Four rows of 20 characters for generous text output
- White on Blue – High-contrast white characters on a blue background
- HD44780 Interface – Industry-standard parallel interface with broad library support
- LED Backlight – Enables viewing in low-light environments
Ideal For
- Arduino and microcontroller projects requiring text output
- Sensor dashboards and data logging displays
- Menu-driven user interfaces
- DIY instruments and monitoring systems
Package Contents
- 1× 20×4 Character LCD Module (White on Blue)
Jargon buster
Plain-language definitions for the technical terms used above.
- LCD
- LCD stands for liquid crystal display, a screen technology that uses a backlight and liquid crystals to show images or text. It matters because LCD modules usually need a display driver and enough controller pins or a bus interface to send image data.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- parallel interface
- A parallel interface sends several bits of data at the same time using multiple wires. It can be faster than simple serial connections, but it uses more microcontroller pins, so it is less convenient for small projects with limited wiring space.
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