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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 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
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. We wanted to design a microcontroller board that was small enough to fit into any project, and low cost enough to use without hesitation. 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. It's our lowest-cost Arduino-IDE programmable board!