USB Volume Knob - 65mm Mike

Print all three files: knob,base and cover. 
If using a NeoPixel ring for illumination, print the knob in a natural/clear filament. 
For the knob I suggest concentric infill and concentric top and bottom fill patterns. 
Obtain parts from Adafriut: 
Trinket: (trinket, trinket pro, gemma, flora etc) 
https://www.adafruit.com/products/1501 
Rotary Encoder: 
https://www.adafruit.com/product/377 
Optional: 
NeoPixel Ring: 
https://www.adafruit.com/products/1463 
Gemma/Trinket 
To program and wire I used Adafruit's tutorial: 
https://learn.adafruit.com/trinket-usb-volume-knob 
Use a little hot glue to secure the neopixel ring in the recess, trinket to the base cover and the cover to the base.