~dmi3 blog

USB Volume Control using Adafruit Rotary Trinkey

[IMG:USB Volume Control (214kB)] [IMG:Adafruit Rotary Trinkey (526kB)]

Adafruit Rotary Trinkey is a cool, 30-minute DIY build project. And having a nice tactile USB volume control knob on your table is very convenient.

Also, I dig Circuit Python development approach: the device is recognized as a USB drive. To program it, you just edit code.py file using any OS/editor. Changes applied immediately on save. Outputs on serial console. No development environment setup is needed! Nice, easy, and very refreshing.

  • Just enough circuitry for volume control
  • Computer sees device as HID. Simulates pressing keyboard media keys so compatible with any OS
    • Also can simulate mouse, for example for a scroll wheel
  • Play/pause on click
  • Extra touch button (for example for next track)
  • Fits in Airport Tick Tac box
  • Multi color RGB LED which you can use for current volume indicator or system notifications
  • Put in laptops USB port, USB hub, or using an extension cable to get gadget in convinient location
  • Source Code using (Circuit) Python is short
  • Requires tiny bit of soldering

Overall I had a lot of fun with this little gadget. Totally recommend!

If you have anything on your mind, drop me email @tilde.club. Lets talk!




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