Feature

●PCF8574T IO expansion board is used as remote 8-bit I/O expander for I2C bus. You can change the device address by short circuit A0/A1/A2. The default address is 0x27. Default address can be detected by programs
●Connect up to 8 PCF8574T IO expansion boards to I2C bus to provide up to 64 I / O ports
●The PCF8574T IO expansion board function allows you to use multi-modules connected to I2C bus by connecting a pin header and connector
●It is equipped with a small potentiometer that can adjust the backlight of the LCD1602 or LCD2004, and a jumper cap to control the switch of the LED light
●Wiki: https://wiki.52pi.com/index.php/PCF8574T_LCD_Driver_Board_SKU:_D-0006


Description

Description:

The I2C interface has many pins on the Arduino for additional features, fully linked with LCD1602 and LCD2004.

Up to 8 modules can be cascaded You can change the device address by short circuit A0/A1/A2. The default address is 0x27. Default address can be detected by programs.

This module uses PCF8574. This allows most MCUs to implement remote I/O port expansion via two two-way buses (I2C). This device includes an 8-bit semi-bi-directional port and I2C bus interface.

The contrast is adjustable, rotate the blue potentiometer clockwise to emphasize it and rotate counterclockwise to weaken. Backlight power control allows you to set whether to connect the backlight power via jumper cap.

On the original LCD1602/2004 screen, you need 7 IO ports to drive. This module only requires two IO ports to drive, so you can save 5 IO ports.

Features:

PCF8574T chip

I2C interface

8-bit parallel ports

Potentiometer backlight control

LED Jumper Switch

Default I2C address: 0x27

Package Includes:

5 x PCF8574TLCD Driver Board