16x2 Character LCD Display Module 5V Blue Backlight

16x2 Character LCD Display Module – 5V Blue Backlight

The 16x2 Character LCD Display Module is the most iconic text display in electronics education and prototyping. Capable of showing 2 rows of 16 characters each, it uses the industry-standard HD44780 controller and is compatible with virtually every microcontroller platform via parallel or I2C (with I2C backpack) interface.

Key Specifications

• Display Format: 16 columns × 2 rows (32 characters total)
• Controller: HD44780 (or compatible)
• Interface: 4-bit / 8-bit parallel (16-pin header)
• Operating Voltage: 5V DC
• Backlight: Blue (white text) or Green (black text)
• Contrast: Adjustable via potentiometer
• Character Size: 5×8 dot matrix per character
• Connector: 16-pin 2.54mm header

Compatibility & Use Cases

Directly compatible with Arduino, ESP32, NodeMCU, and Raspberry Pi using the LiquidCrystal library (parallel) or LiquidCrystal_I2C library (with I2C backpack). Common applications include:

• Sensor data readout (temperature, humidity, distance)
• Menu and user interface displays for embedded systems
• Real-time clock and countdown timer displays
• IoT device status and IP address display
• STEM and beginner electronics project builds

Add an I2C backpack module to reduce wiring from 6 pins down to just 2 (SDA + SCL) for cleaner builds.

Frequently Asked Questions

Do I need an I2C module to use this LCD with Arduino?
No. This LCD works directly with Arduino using the built-in LiquidCrystal library over a 4-bit parallel connection. An I2C backpack is optional and simply reduces the wiring to 2 signal pins (SDA and SCL), which is helpful when your project is short on GPIO pins.

Which backlight colour will I receive?
This display is available in blue (white text) or green (black text) backlight variants. Both versions use the same HD44780 interface and code.

Which Arduino library works with this display?
Use the LiquidCrystal library included with the Arduino IDE for a direct parallel connection. If you add an I2C backpack, use the LiquidCrystal_I2C library instead.

Can I use it with a 3.3V board like ESP32?
The LCD is a 5V module. Power it from 5V and use level shifting on the data lines, or choose our 16x2 LCD with a pre-soldered I2C module for a simpler 4-wire hookup.

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