LCD1602 16x2 Character LCD Module I2C IIC Interface 5V
LCD1602 16x2 Character LCD Module I2C IIC Interface 5V
LCD1602 16x2 Character LCD Display Module with I2C IIC Interface
The LCD1602 is a versatile 16x2 character LCD display module featuring an I2C/IIC interface (PCF8574T / PCF8574 backpack), making it one of the easiest and most popular display modules for microcontroller projects. Whether you're building with Arduino, Raspberry Pi, or any other 5V microcontroller platform, this module delivers crisp, readable text output with minimal wiring.
Key Features
- 16 columns × 2 rows — displays up to 32 characters simultaneously
- I2C / IIC interface via onboard PCF8574T / PCF8574 expander — reduces wiring to just 4 pins (VCC, GND, SDA, SCL)
- 5V operating voltage — compatible with Arduino, Raspberry Pi, ESP32, ESP8266, and more
- Backlight options: Blue with white characters, or Yellow-Green with black characters
- Adjustable contrast via onboard potentiometer
- Compact and breadboard-friendly design for easy prototyping
- Plug-and-play with widely available open-source libraries (e.g., LiquidCrystal_I2C)
Specifications
- Model: LCD1602 (1602)
- Interface: IIC / I2C (PCF8574T / PCF8574)
- Operating Voltage: 5V
- Display Format: 16 Characters × 2 Lines
- Backlight Colors: Blue / Yellow-Green
- Plug Type: None (solderable pin header)
- Quantity: 1 piece
- Certification: None
What's in the Box
- 1 × LCD1602 16x2 Character LCD Module with I2C IIC Interface
Ideal For
- Arduino and Raspberry Pi hobbyist projects
- DIY electronics and maker builds
- Sensor data readouts, menu systems, and status displays
- Educational electronics kits and STEM projects
- Prototyping and embedded systems development
For helpful guidance on working safely with electronics components, visit the U.S. Consumer Product Safety Commission (CPSC) for consumer electronics safety information.
Frequently Asked Questions
Q: What interface does the LCD1602 module use, and how many wires does it need?
A: The LCD1602 module uses an I2C (IIC) interface via the onboard PCF8574T or PCF8574 chip. This means you only need 4 wires to connect it to your microcontroller: VCC (5V), GND, SDA (data), and SCL (clock) — making wiring far simpler than a standard parallel-connected LCD.
Q: Is the LCD1602 I2C module compatible with Arduino and Raspberry Pi?
A: Yes! The LCD1602 with I2C interface is fully compatible with Arduino boards, Raspberry Pi, ESP8266, ESP32, and most other 5V or 3.3V (with level shifter) microcontroller platforms. It works seamlessly with the popular open-source LiquidCrystal_I2C library for Arduino.
Q: What is the difference between the blue and yellow-green backlight versions?
A: The blue backlight version displays white characters on a blue background, offering high contrast in low-light environments. The yellow-green backlight version displays black characters on a yellow-green background, which can be easier to read in bright ambient light. Both versions are functionally identical — only the backlight color differs.
Q: How do I adjust the contrast on the LCD1602 module?
A: The module features a small blue potentiometer on the PCF8574 backpack board. Turning this potentiometer clockwise or counter-clockwise adjusts the display contrast so your text appears sharp and clear. If nothing appears on screen after powering up, try adjusting the contrast pot first.