I2C LCD Display Interface Module – PCF8574T Serial Adapter for 16×2 and 20×4 LCD Screens (Arduino/Raspberry Pi Compatible)

Product Description:

Save time and simplify wiring with this I2C LCD Display Interface Module. Designed around the PCF8574T I/O expander, this module allows you to connect your 16×2 or 20×4 LCD screen using just two data lines—SDA and SCL. Perfect for Arduino, Raspberry Pi, ESP32, and other microcontrollers, it dramatically reduces the number of pins needed for display projects. With an onboard potentiometer for contrast adjustment and a soldered header, this adapter is plug-and-play ready for your next DIY or professional build.

Key Features:

• ✅ PCF8574T I/O Expander Chip – Enables I2C communication with your LCD.

• ✅ Saves I/O Pins – Reduces LCD pin usage from 16 to just 2 (SDA & SCL).

• ✅ Wide Compatibility – Works with 16×2 and 20×4 LCD character displays.

• ✅ Adjustable Contrast – Built-in blue potentiometer to fine-tune text visibility.

• ✅ Onboard Power LED – Indicates when the module is powered on for easy debugging.

• ✅ Plug & Play with Arduino Libraries – Fully supported by LiquidCrystal_I2C and similar libraries.

🌟 Special Features:

• 🔄 Address Selectable via Jumpers – Change I2C address to use multiple LCDs on the same bus.

• 🧩 Compact Design – Easily mounts behind the LCD to save space in compact enclosures.

• 🔌 Simple 4-Pin Interface – VCC, GND, SDA, SCL – straightforward integration with microcontrollers.

• 💡 LED Control Pin (Backlight) – Manage LCD backlight using code or switch.