The Knob - Micro USB Media Controller (Digispark Arduino)

thingiverse

**1 knob, 6 functions.** This tiny, *super cheap* media controller works with all devices that supports USB Media Controls - computers, tablets, phones etc. Tested so far with Windows 10 & Android 6. A single knob performs the following: * Play - *press knob* * Pause - *press knob again* * Volume up - *turn knob right* * Volume down - *turn knob left* * Previous track - *press AND turn knob left* * Next track - *press AND turn knob right* **You can also replace the actions of the knob with pretty much any key press you want**. See *Changing functions* further down this page. There are several one-knob media controllers out there, but I've found no version that allows you to change tracks without dedicated buttons (like my larger [Arduino Pro Micro-based Media Controller](https://www.thingiverse.com/thing:2967216) has). And none so cheap and easy to build. The only components needed are a **Digispark (Micro USB version)** Arduino microcontroller and a **KY-040** rotary encoder, which can be had for about **1€ each** on eBay/Ali. A few wires to solder and that's it - hardware is done! I'm also including the Arduino source I wrote which includes (or links to) pinouts, libraries , instructions and pretty much everything you need in order to program the controller. I made several different knobs that you can choose from. The encoder has a standard D-shaped 6mm shaft so there are a multitude to choose from if you want to buy or get one from elsewhere. ***Update 2018-07-03*** Pinout diagram added. Software updated to version 2.0, courtesy of [IAmOrion, aka James Tanner](https://www.thingiverse.com/IAmOrion). Basically rewritten from scratch - fixes a problem when changing direction, includes debugging mode and opens the possibility for much more advanced functions. Settings are now all in a separate *Settings.h* file. All code can be found in *The_Knob_Arduino_code_v2.0.zip*. See the Comments section for even more versions with added functionality from IAmOrion (triple-click, anyone?).