This project is about how to make a stopwatch using Arduino Nano and an $ LCD. $ Its a fun project to learn how to use an LCD with Arduino. If you want to learn how the Arduino takes in input from devices then you might want to try this project.

The stopwatch performs three basic functions i.e start, pause/stop, reset and it can count up to 23:59:59.

First connect one terminal of the switch to the digital I/O pins of the Nano and the other terminal (diagonal terminal) to +5V. (You can connect the other terminal to GND depending on the type of switch you are using.

Second connect the 16×2 LCD. If you need help with the LCD connections, refer to the diagram below.