In this project, we will create a system for controlling a relay using a button. The state of the relay will be displayed on a 16x2 LCD with an I2C interface. Additionally, we will display Polish ...

4 and 19 pins are used to adjust the display contrast through a resistor. I use a 1 Mega Ohm variable resistor. Acceptable contrast ~270kOm.

Output modules for buzzers, LED indicators, a servo motor, and a user interface LCD screen constitute the system. Automated, affordable, environmentally friendly means of crop protection using ...