My original intent for this project was to supply an audio input to feed homemade oscilloscopes,but in reality there are lots of fun things to do with a simple audio amplifier. This project is very "loose" meaning that although I have a nice selection of components and a decent knowledge of how they work......... I'm the hack. At best I have the knowledge and skills to stay safe, even though I mess around with automotive coils and CRT flyback transformers and massive Capacitors.
This project is also "loose" because If I were to give a step by step instruct-able .... chances are you wouldn't be able to find the exact parts that I list but It doesn't matter. This is just a guide. This picture shows a "Cool Cube" . I bought about 15 of them at a Store called "Princess Auto" which I think must be Canadian only. They do online orders so that might be an option.