So, this uses the mini jack as an audio input. I've built a few 555/556/74hc (etc. signal generators) this seems to be the perfect way to amplify the...
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.