I made the first version of my self-playing drum machine. In this page you can find the final presentation both as a slide (right below) and a video (further below).
This is a video I made connecting everything to an Arduino and running a script I programmed with Arduino. The cables look a little messy but I changed that and made it better after I made my project presentation.
To check and view how this project was made and all of the documentation needed to make your own, check the Project Development page.