USB volume and power control

thingiverse

Hello. I wanted to build my own USB volume controller, but since I didn't have a Digispark, I decided to build it with what I had: Atmega328. However, I also needed to add the ability to turn off the speakers from this switch. For this project, I used the modified TrinketHidCombo library by dimax for Atmega328 at 16MHz. It also helped me with processing the encoder on interrupts. http://arduino.ru/forum/proekty/emulyator-myshi-klaviatury-multimediya-klaviatury-na-obychnykh-adruino-unonanominipro?page=1 I printed the body of the project using ABS plastic, and then skinned and assembled it. I also glued 2mm matte glass to the handle. Of course, there are many things that can be simplified or removed: 1. Simplify the protection against rattling 2. Use a ready-made relay module, but I couldn't find one that fit in my case. So, I had to remove the ME9926 and the corresponding circuits (to reduce power consumption and prevent back EMF). 3. The shimming for backlight is not necessary; I didn't do anything with it, you can just use a resistor. It will be much easier to repeat this project on Digispark. I'm attaching the Diptrace printout and the source code. https://youtu.be/ubRgA1CSi0o You can also build this project using an Arduino pro mini, a relay module, and an encoder module: http://ali.onl/1bj8 http://ali.onl/1bj9 http://ali.onl/1bja For programming, you'll need a UART adapter, from which you can get 3.3V: http://ali.onl/1bjc