music with relay and arduino

so in this tutorial, I am going to show you how to create music with relay and Arduino interesting beginner-friendly project

how its works

if you are familiar with relays .you may notice the triggering sound of the relay. that sound is our key .we trigger relays in a particular sequence to generate music awesome let's start building. before that please watch the making video for detailed instructions
components needed

1.arduino uno

2.relay module
3.8 ohm speaker
4.led
5.breadboard

circuit diagram

code

pitches.h