Link to code:
https://akuzechie.blogspot.com/2021/04/arduino-based-stopwatch.html
Link to I2C LCD display library:
https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
Contents:
0:00 Introduction
0:14 Circuit Diagram
0:42 Demonstration
1:10 C++ Sketch
2:40 Conclusion