LCD screen operation module with two ends

I2C serial control for LCD screen using PCF8574. The backlight can be enabled or disabled through a jumper on the board. Contrast control via voltage divider. It can contain 8 units on one I2C bus (change the address via solder jumpers), allowing this. I2C communication unit used with 16*2 LCD screens to add I2C communication protocol feature to make its connection easier and less cables. Additional information Specifications (I2C communication unit): Power supply voltage: 5 volts Compatible with 16*2 LCD screens Easy control via Arduino Screen contrast can be controlled via the attached variable resistor I2C address can be changed by soldering the A0 A1 A2 points