20×4 LCD Character Display Module (Green Backlight)

20×4 LCD Character Display Module (Green Backlight)The 20×4 LCD Character Display Module delivers reliable, high-visibility character output in a compact package. Built around the industry standard HD44780 compatible controller, this module integrates quickly with Arduino, Raspberry Pi and most microcontroller platforms for fast prototyping and production use. Its 20 characters by 4 lines layout is ideal for status messages, multi-line menus, sensor readouts and logs.Key FeaturesDisplay format: 20 characters x 4 lines for multi-line data and menusController: HD44780 compatible for broad library and example supportInterfaces: Supports 4-bit and 8-bit parallel modes to match project pin budgetsBacklight: Adjustable green backlight for improved visibility in different lighting conditionsContrast: On-board potentiometer for fine-tuning text clarity without extra componentsPower: Low power consumption suitable for battery-powered devicesMounting and pinout: Standard 14/16-pin HD44780 pinout for plug-and-play use with headers, shields and breakout boardsCompatibility and LibrariesThis 20×4 LCD module is designed for easy use across common development platforms.Arduino: Works with LiquidCrystal and most HD44780-compatible libraries for rapid development.Raspberry Pi: Usable via GPIO libraries and HD44780 wrappers or Python libraries for text control.Microcontrollers: Compatible with PIC, AVR, STM32 and other MCU families using standard HD44780 routines.Interfaces and IntegrationUse the module in 4-bit mode to conserve microcontroller I/O pins or in 8-bit mode for simpler data transfer:Pinout: Standard 14/16-pin HD44780 pinout for direct compatibility with many shields and breadboards.Modes: 4-bit mode to reduce pin usage; 8-bit mode for straightforward parallel communication.Power and backlight pins: VCC and GND plus separate backlight pins for optional brightness control or PWM dimming.Mounting: Fits common headers and breakout boards for easy mechanical integration.Technical SpecificationsDisplay: 20 characters x 4 linesController: HD44780 compatibleInterface: 4-bit and 8-bit parallel communicationBacklight: Green, adjustable brightnessContrast: On-board potentiometer for fine-tuningPower: Low power consumption suitable for battery-powered designsPinout: Standard 14/16-pin HD44780 layoutTypical ApplicationsEmbedded systems: Display sensor values, system states and logsHome automation: Status and menu displays for smart panelsRobotics: Telemetry, error codes and runtime informationIndustrial control: Parameter monitoring on control panels and operator HMIsEducation and prototyping: Ideal for learning, demos and electronics projectsWiring and Quick Start TipsConnect VCC and GND first. Adjust the contrast potentiometer with power applied before enabling data signals from microcontrollers.Use 4-bit mode when you need to save I/O pins. Initialization is supported by common libraries.Use Arduino LiquidCrystal or Raspberry Pi HD44780 wrappers for immediate results and example code.To conserve battery life, reduce backlight brightness or disable the backlight when not needed.Why Choose This 20×4 LCD ModuleThis 20×4 LCD Character Display provides wide compatibility due to the HD44780 controller, flexible interfacing with 4-bit and 8-bit modes, and customizable visibility with an adjustable green backlight and contrast control. Its low power draw makes it well suited for hobbyists, educators and professional projects that need clear multi-line text in a compact format.Note: Images are for illustration only. Categories: Boards, Modules and Accessories, Display Modules and LCDs Tags: 20x4 LCD Module, adjustable backlight, Arduino display, contrast control, HD44780 controller, LCD 20x4 display, low power display, Raspberry Pi display College Road Electronics4.85 (317 Reviews)