Hello, i am an complete beginner with Arduino and i need help creating an really basic sound detector that would turn on red or green light depending on how loud it is in the room where this will be mounted. I know it is hard to calibrate it correctly but i don't really need it to be that accurate. I am planning to buy an KY-038 Mic if that is okay? For lights i wanted to just put a few same color LEDs together so it will be a bit more bright. I will put all this together on an breadboard or just on the Arduino. Is there maybe some guide or something so i know where to start? I searched and found some results but there isn't really any explaining how exactly to do this.
Hi, @averagenokiauser
Welcome to the forum.
Did you Google;
arduino sound meter
And find this;
If you look down in the comments there is even a question about KY-037.
I'm not sure what the difference is between 37 and 38 models.
You can do a crude calibration with a sound level meter on a smarty phone.
Tom.... 
Oh thanks i didn't see that. I will look at this guide now.
Hi! Welcome to the Forum.
If you want an alternative for @TomGeorge 's suggestion, take a look at post #60 of this topic:
https://forum.arduino.cc/t/classroom-noise-detector/
Still need some improvement, but basically it works.
This looks interesting too.
Do you maybe know what i need to search to find that breadboard? Its not listed at the project page.
Its called solderless breadboard.
Sold though many outlets around the internet.
Good for prototyping, but not for a permanent final product.
Google;
solderless breadboard
Tom....
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