Trinket rotary encoder. You need to read up on programming rotary encoders (look for "quadrature decoding"). . This project demonstrates using a rotary encoder as a multimedia volume control and mute switch for your computer. So we thought, hey what if we made something like that that plugs right into your computer's USB port, with a fully programmable The Adafruit Pro Trinket Rotary Encoder project is an example for the ProTrinketHidCombo library. ProTrinketHidCombo is a part of Adafruit's Pro Trinket USB HID Arduino Libraries. So we thought, hey what if we made something like that that plugs right into your computer's USB port, with a fully programmable It's half USB Key, half Adafruit Trinket, half rotary encoderit's Rotary Trinkey, the circuit board with a Trinket M0 heart, a NeoPixel glow, and a rotary encoder body. Use it to encourage yourself to spend more time away from social media and tech devices. This tutorial will show use of the library using a rotary encoder switch as a digital volume knob and mute switch for multimedia PCs. You can do it by simply sensing the two leads, but the better way is to use Interrupts. To keep the brightness up you must crank the rotary encoder.