I2C, PCF8574

[FATİH YILMAZ]

Greetings to everyone. I not only simulated the sample circuits and software, but also wanted to try them in the real circuit. I ordered 10 I2C LCD drivers. These circuits were the types commonly purchased for Arduino. When my orders arrived, I quickly installed the actual circuit and got it running. But I could not get any image on the LCD screens. Later, I learned about two different types of integrated circuit systems in I2C LCD drivers, PCF8574A and PCF8574. I saw that the change in the relevant database in the program made it run in two different structures.

"Symbol I2C_Print_address = %01110000' PCF8574A Slave Address"
"Symbol I2C_Print_address = %01000010' PCF8574  Slave Address"