I2C/IIC Interface Module (PCF8574) for Connecting 1602 and 2004 Character LCD Displays to Arduino

I2C adapter module based on the PCF8574 chip for LCD1602 and LCD2004 character displays. Reduces the number of wires needed to connect the display to a microcontroller from 6–10 down to just 2 signal lines. Equipped with a contrast adjuster and a backlight control jumper.

Product code	12828
Category	Arduino
In stock	5+ in stock

44 TL

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§ 02 — Description

A universal planar I2C (IIC) adapter that simplifies and automates connecting HD44780-based character LCD displays (1602, 2004) to Arduino boards and other microcontrollers. Pin savings: Converts the parallel 8-bit/4-bit display control interface into a serial I2C interface, freeing up to 6 digital I/O ports on the microcontroller. Easy setup: The blue multi-turn trimmer resistor on the board lets you quickly adjust character contrast without any external components. Backlight control: The removable LED jumper allows you to turn the display backlight off in software or hardware to save power. Features Port expander chip: PCF8574T / PCF8574AT Supported displays: Character LCD displays LCD 1602 (16×2) and LCD 2004 (20×4) Communication interface: I2C / IIC (uses only 2 signal lines, SDA and SCL) Operating voltage: 5.0 V DC (compatible with 3.3 V logic with pull-up resistors) Default I2C address: 0x27 or 0x3F (configurable with jumpers A0, A1, A2) Contrast adjustment: Built-in blue trimmer potentiometer Backlight control: Jumper (LED jumper) to enable/disable the rear backlight Connector: 4-pin header (GND, VCC, SDA, SCL)