Music Equalizer Display: Introduction

Project Info
Author: Chris
Difficulty: Easy-Medium
Time Invested: 4 Hours

Take a look at the above
tutorials before continuing
to read this tutorial.
           Music equalizers are traditionally broken up into the different frequency ranges in order to "equalize" the sound that comes out. The equalizer display that we'll make in this tutorial will just be based off of the straight music signal.
           An amplitude based equalizer isn't terribly useful however it still looks cool =D and you'll learn how to use the A/D converters on the pic. The audio signal we'll use will be generated from a laptop then converted and understood by the pic.

The PIC Microcontroller

The Equalizer LED Bar Display

Purpose & Overview of this project
           The goal of this tutorial is to create a device that takes a standard headphone audio signal (from a laptop), interprets it and outputs the voltage amplitude onto an LED bar. The LED Bar should change rapidly with the flow of the music beat & rhythm.
           The PIC will use its internal analog to digital converters to accomplish the above task. The completed circuit will be all done on a small breadboard.