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).
Required Parts:Solderless breadboard
or this onelow power audio amp IC100µF
capacitorjumper wiresaligator clipsLoudSpeaker
(or better yet, build your own
audio cables/adaptors (to connect to a sound producing device)
Optional Parts:1kΩ resistorLED9V battery clippotentiometer