Opening the Mixed Control Oscillator

I recently read this article on Make: Magazine about the “unspoken” rules of Open Hardware.

The MCO is not quite finished, but I guess it would be selfish to only post updates on this blog without revealing how it actually works..
For that reason, this project is now under the CC-BY-NC-SA license. For those who are not quite familiar with licenses, I invite you to click that button:

In other terms, you are free to do whatever you want with this project, as long as you mention its source (either a link to the Forty Seven Effects blog, or mention my name), and as long as you do it for personal use only. If you want to sell a project that uses it, feel free to contact me.
Explaining everything into one blog post would be long and boring, so I’m going to split the things to facilitate the reading.
Next time: Reminder of the specifications, and the central processor.