O'Reilly logo

Electronics All-in-One For Dummies, UK Edition by Doug Lowe, Dickon Ross

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 3

Making Light Dance to the Music

In This Chapter

arrow Taking a peek at the project

arrow Creating the circuit

arrow Lighting up to music

No doubt you’ve seen the various lights that change with the mood of the music at a disco, maybe in a school hall or at a wedding. One of the lights reacts to the sound from the record, flashing with the beat, subsiding in the quieter passages and so on.

In this chapter, we combine light and sound electronics to build a light that works in a similar way, but which you can use with any kind of music (you don’t have to drag your 1970s’ flares from the back of the wardrobe, unless you really want to). We show you how to set up two rows of lights that illuminate to different frequencies of sound. When you put on a fast, loud or heavily accented piece of music – say, swing or reggae – the lights dance all around. Every piece of music has its own, unique effect.

We arrange the lights like notes on a music staff, but you can put them in any arrangement you like. By working through this fun project, you get to know more about frequency filters, operational amplifiers and how music can light up the dance floor.

Illuminating the Big Picture: Project Overview

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required