LCD1602 I2C Module PCF8574 IIC Blue/Green Screen Display

LCD1602 I2C Display Module with PCF8574 IIC Adapter

Upgrade your electronics projects with the LCD1602 I2C Module — a compact, easy-to-wire character display featuring the PCF8574 IIC interface adapter. Whether you're building an Arduino project, a Raspberry Pi dashboard, or a custom embedded system, this module delivers crisp, readable 16x2 character output with minimal wiring thanks to the integrated I2C backpack.

Key Features

• I2C / IIC Interface: Reduces wiring to just 4 pins (VCC, GND, SDA, SCL) — perfect for microcontrollers with limited GPIO pins.
• PCF8574 Chip: Industry-standard I/O expander enables seamless I2C communication with Arduino, Raspberry Pi, STM32, and more.
• 16x2 Character Display: Displays up to 32 characters across 2 rows — ideal for sensor readouts, menus, status messages, and project UIs.
• Blue or Green Backlight: Choose from 5 variants — LCD1602 Blue, LCD1602 Green, 1602 I2C Blue Weld, 1602 I2C Green Weld, or LCD1602 Module — to match your project aesthetic.
• Onboard Contrast Potentiometer: Fine-tune display contrast easily with the built-in trimmer pot.
• Customizable: Solderable header pins allow flexible integration into breadboard or PCB builds.
• Compact & Lightweight: Fits neatly into enclosures and DIY electronics housings.

Specifications

• Display Type: 16 x 2 Character LCD
• Interface: I2C / IIC (via PCF8574)
• Operating Voltage: 5V DC
• Backlight Color: Blue or Green (5 variants available)
• Compatible With: Arduino, Raspberry Pi, STM32, ESP8266, ESP32, and more
• Default I2C Address: 0x27 (or 0x3F depending on variant)

What's in the Box?

• 1 x LCD1602 Display Module with I2C PCF8574 Adapter (variant of your choice)

Great For

• Arduino & Raspberry Pi projects
• DIY electronics and maker builds
• Sensor data display panels
• Home automation interfaces
• Robotics and embedded system UIs

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Frequently Asked Questions

Q: What microcontrollers are compatible with the LCD1602 I2C PCF8574 module?

A: The LCD1602 I2C module is compatible with a wide range of microcontrollers, including Arduino (Uno, Mega, Nano), Raspberry Pi, ESP8266, ESP32, STM32, and most platforms that support I2C communication. Simply connect VCC, GND, SDA, and SCL pins and use a standard LiquidCrystal_I2C library to get started.

Q: What is the difference between the Blue and Green backlight variants?

A: The blue backlight version features a blue-lit background with white characters, while the green backlight version offers a classic green-lit background with dark characters. Both provide clear visibility; the choice is primarily aesthetic and based on your project's design preference. Weld variants come with pre-soldered header pins for immediate use.

Q: How do I set the I2C address for the LCD1602 PCF8574 module?

A: Most LCD1602 I2C modules using the PCF8574 chip default to address 0x27 or 0x3F. You can verify the address by running an I2C scanner sketch on your Arduino or microcontroller. Some modules have onboard solder jumpers (A0, A1, A2) that allow you to change the address if you need multiple displays on the same bus.

Q: Does this module require any soldering?

A: The standard (non-weld) variants come with unsoldered header pins, giving you the flexibility to solder them in your preferred orientation. The "weld" variants come with pre-soldered headers for plug-and-play convenience on a breadboard or direct wiring.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.