I am new here, however I've read several forums before posting here.
I would like to design a light sensitive mp3 module, like the ones you get on birthday cards.
However, I only found videos on how to design a light sensitive breadboard that uses a LED that will turn on or off, depending on the amount of light that the light sensor absorbs. Similar question: http://forum.arduino.cc/index.php?topic=104067.0
So, I thought I could use an arduino to design my board design more easily. But I do not know from where to start.
I found a board design online that seems like its working, however it lacks the code that it might be needed in order to make the arduino communicate with the rest of the board. Here's a link: https://circuits.io/circuits/2926278-music-and-light