How do I make a noise-detecting traffic light?
I am not sure how many people have seen these, but they are used in Elementary school alot. Basically, when the light is green the noise level is at the right level, if it is yellow it is getting a bit too loud and red is WAY too loud. I want to use this type of idea in my classroom. It doesn't have to be a traffic light but a series of light. I just don't know much about wiring.