The Attiny85 is a fun processor because despite being so small, it has 8K of flash, and 5 I/O pins, including analog inputs and PWM ‘analog’ outputs.
It’s our lowest-cost arduino-IDE programmable board! Perfect for when you don’t want to give up your expensive dev-board and you aren’t willing to take apart the project you worked so hard to design. We wanted to design a microcontroller board that was small enough to fit into any project, and low cost enough to use without hesitation. Trinket may be small, but do not be fooled by its size! It’s a tiny microcontroller board, built around the Atmel ATtiny85, a little chip with a lot of power. If you have a rotary encoder with a built-in switch, you can even extend this project to turn it into a volume/mute control. One thing I miss from my old stereo system is the big volume knob, maybe you wish your computer or laptop had a volume knob too, too? This tutorial will show how you can build a little desktop toy that lets you quickly set the volume without having to open up iTunes or your control panel or run amixer. How to make a TRINKET USB Volume Knob The Adafruit Learning System.
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