Right, the concept of the knob made of concrete is fully inspired by DIY Perks. But we've added a lot of sugar:

- Open-source Arduino-compatible firmware so you can add your functionalities and light effects;

- The audio is controlled with the HID library instead of potentiometer;

- There are one audio input and two outputs that can be switched with the hardware switch;

- Bonus option is you can use it as a scrolling knob;

- The audio lines are connected to the microcontroller and you can add light effects relative to the sound;

- It is 3d printed and we also added a 3d printable model of the mold for the concrete part;

I think that the concept of a knob made of concrete could definitely be made through independent invention given that concrete is a popular aesthetic right now, but it still wiggles it's eyebrows...

https://www.thingiverse.com/thing:4424564

> So, driven by the idea, I began to look for some inspiration and finally found this awesome video made by DIY Perks youtu.be/sJ5vhShdVjo I am starting to develop.