10PCS DC 3-6V PCF8574 LCD Display Adapter Module IIC I2C LCD1602 2004 IIC Serial Interface Board for Arduino Features: 1. Use I2C interface to save microcontroller IO port resources. 2. The onboard potentiometer can adjust the contrast of the LCD display. 3. Jumper cap design allows for free control of backlight switches. 4. Support modifying device I2C address, default 0x27. 5. The exterior design is compact in structure and easy to install. Introduction: Connecting LCD1602/2004 to a microcontroller will occupy many IO ports. This module can directly drive LCD1602/2004 using the I2C interface, which only requires two ports, greatly saving the IO port resources of the microcontroller. There is also a potentiometer on the module to adjust the brightness of the LCD, which is very convenient to use. Parameters: PCB color: Black Supply voltage: DC 3-6V Protocol: Supports I2C protocol You can set whether there is a backlight by jumping on the jumper cap. Inserting the jumper cap connects to the backlight power supply, and unplugging the jumper cap disconnects the backlight power supply; The contrast can be adjusted through a potentiometer. Rotate the blue potentiometer clockwise to enhance and counterclockwise to weaken. The potentiometer is designed on the front for customers to freely adjust anytime, anywhere. The address of device 12C can be modified by short circuiting A1/A2/A3, with a default address of 0X27. PCB board size: 42mm * 19mm (excluding pin arrangement) Package included: 10PCS x DC 3-6V PCF8574 LCD Display Adapter Module IIC I2C LCD1602 2004 IIC Serial Interface Board for Arduino _x000D_