20×4 – Hamtech Electronics Technologies https://hamtechtechnologies.com Sun, 30 Nov 2025 09:54:06 +0000 en-US hourly 1 https://wordpress.org/?v=7.1 https://hamtechtechnologies.com/wp-content/uploads/2025/11/h-100x100.webp 20×4 – Hamtech Electronics Technologies https://hamtechtechnologies.com 32 32 20×4 LCD https://hamtechtechnologies.com/product/20x4-lcd/ https://hamtechtechnologies.com/product/20x4-lcd/#respond Thu, 20 Nov 2025 19:51:51 +0000 https://hamtechtechnologies.com/index.php/product/20x4-lcd/ 20×4 LCD Module is a character display capable of showing 20 characters per line across 4 lines, ideal for Arduino, ESP32, Raspberry Pi, and other microcontroller projects.]]> The 20×4 LCD Module is a popular alphanumeric display module based on the HD44780 controller, capable of displaying 20 characters per line on 4 lines. It supports 4-bit or 8-bit parallel communication and can be interfaced directly with microcontrollers using digital I/O pins or via I2C with an adapter. It is widely used in DIY electronics, IoT, robotics, and embedded systems for displaying text, sensor readings, system status, and menus. Its backlight provides clear visibility in low-light conditions, and it’s compact enough for integration into custom enclosures.

Key Features

  • 20 characters × 4 lines display

  • HD44780 or compatible controller

  • Backlight for better visibility

  • Supports 4-bit and 8-bit parallel interface

  • Compatible with Arduino, ESP32, and Raspberry Pi

  • I2C interface available with adapter for simplified wiring

Variants

  • Standard 20×4 LCD (parallel interface)

  • 20×4 LCD with I2C adapter (simpler connection)

Specifications

Feature Details
Display Type 20×4 Alphanumeric
Controller HD44780 / Compatible
Interface 4-bit / 8-bit parallel (I2C optional)
Operating Voltage 5V DC
Backlight Yes (LED)
Character Size 5 × 8 dots
Dimensions 85 × 50 × 12 mm

Applications

  • Arduino, ESP32, and Raspberry Pi projects

  • Sensor data display (temperature, humidity, etc.)

  • Menu-driven interfaces for embedded systems

  • Robotics and automation feedback screens

  • DIY IoT dashboards and monitoring systems

Compatible Boards / Circuits

  • Arduino Uno, Mega, Nano

  • ESP32 / ESP8266

  • Raspberry Pi (GPIO or I2C)

  • Any microcontroller supporting 4-bit/8-bit or I2C LCD communication

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