This project implements the V-USB firmware from Objective Development to emulate a class compliant audio / MIDI stream device using an Atmel AVR microcontroller. It is based on the V-USB-MIDI project by Martin Homuth-Rosemann and partly on the 4-key-keyboard project.
The nice thing about this project is that it takes advantage of the internal RC oscillator of the Attiny and therefore doesn't need a crystal.
- 1x Atmel ATTiny45-20PU or ATTiny85-20PU microcontroller
- 2x Diodes (1N4148)
- 2x 68 ohm resistors
- 1x 1.5K resistor
- 1x 0.1 uF capacitor
- 1x 10K potentiometer
- 1x USB cable with USB-A plug
- Programmer for Attiny45 / 85
The Fuses have to be set to 0xC1 (low), 0xDD (high) and 0xFF (ext.).
The PID and VID used in this project are sponsored by Objective Development.
AVR is a registered trademark of Atmel Corporation.
Download the project and the .hex file here. It should work equally well on both the Attiny45 and the Attiny85.