Blue LCD 2004 20x4 HD44780 display I2C converter Arduino Raspberry

LCD 2004 20x4 HD44780 display with I2C converter for Arduino and Raspberry Pi One of the most popular alphanumeric LCD displays, powered at 5V. The screen can show 20 characters in each of four rows. The kit includes a factory-soldered I2C converter, so only two communication lines are needed to drive the display-SDA and SCL. Over the I2C bus, from any microcontroller (e.g. Arduino, Raspberry Pi, ESP8266, ESP32), you can fully control the on-screen text and backlight, turning it on or off at any time. The board also integrates a potentiometer for smooth contrast adjustment. Key technical specifications

* Display model: QC2004A

* Character format: 4 rows of 20 characters (4×20)

* Backlight color: blue

* Display driver: compatible with HD44780

* Supply voltage: 5V

* Module dimensions: 98 × 60 mm

* Integrated converter IC: PCF8574

* Communication interface: I2C

* Additional equipment: LED and soldered converter

Example applications

* User interfaces in projects based on Arduino and Raspberry Pi

* Real-time monitoring of sensor parameters

* Information displays in home automation systems

* Displays in weather stations and measurement devices

* Control panels in machines and prototype equipment

Benefits

* Fewer microcontroller pins-only two pins (SDA and SCL) are enough for control

* Ready to use immediately thanks to the factory-soldered I2C converter

* High readability thanks to blue backlight and large screen size

* Broad compatibility with popular development platforms and libraries (compatibility with the HD44780 standard)

* Easy adaptation to different lighting thanks to built-in contrast adjustment