VU Meter - Let's Make It - Episode 23

This week we make a simple VU meter using an Arduino.  We take audio input from either a microphone or a line level input and use a small transistor to amplify the signal, add some leds and some basic code to create a VU meter that has a switchable peak meter.

For Show Notes go to: http://tech-zen.tv/episodes/shows/make-it-work/episodes/vu-meter-episode-23