This MIDI-powered robotic music box is the good news I needed this week

TechCrunch

Tech / TechCrunch 164 Views 0

It’s been a bit of a tumultuous week, to put it lightly, but one must always remember that no matter how dire things look on the global stage, there are always makers working obsessively to create something beautiful and useless — like this MIDI-driven, robotic music box.

Tinkerer and music box aficionado Mitxela (via Hackaday) was pleased by this music box that takes punch cards or rolls as input, rather than having a metal drum with the notes sticking out of it. But who wants to punch cards all day to make a music box go? These things are supposed to be simple!

Mitxela first made a script that takes a MIDI file and outputs an image compatible with his laser cutter, allowing cards or paper strips to be created more or less automatically. But then there’s the question of wear and tear, storing the strips, taping them together for long pieces… why not just have the MIDI controller drive the music box directly?

It clearly took some elbow grease, but he managed to create a lovely little machine that does just that. The MIDI pattern maps to a set of small servos, each of which is attached to a rigid brass wire and plastic tip. When the servo activates, the tip pushes the corresponding little cylinder in the music box, producing a note.

Now MIDI files (single-instrument ones, anyway) can be played directly. But there’s more! Mitxela’s efforts to lower the power draw and simplify the mechanisms had the incidental side effect of lowering the latency so much that you can even play the music box in real time using a MIDI keyboard. How delightful!

The video has quite a few breaks to listen to video game themes, so if you’re just interested in the device, you can skip through to the (relatively) technical parts. But hearing the Mario theme tinkling through a neat little gadget like this isn’t the worst way to spend a Friday afternoon after a week like this one.

You can check out the rest of Mitxela’s little hardware projects at his website.

Comments