Introduction: DIY Audio Amplifier
This video shows you how to build a simple audio amplifier that can be connected to any device with an audio output jack (such as an iPhone, which we show in this video).
Solderless breadboard or this one
low power audio amp IC
100µF or 470µF capacitor
LoudSpeaker (or better yet, build your own)
audio cables/adaptors (to connect to a sound producing device)
9V battery clip