spacenate / olark-observer-hardware

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Olark Observer Hardware

USB Vendor class device implementation using V-USB on the ATtiny85.

To accommodate a common-cathod RGB LED with PWM for each RGB channel, the following schematic should be adjusted as follows: USB D- to PB2, D+ to PB3, common cathode RGB LED with red to PB4, green to PB0, and blue to PB1

• R1 1.5kOhm
• R2,R3 68ohm
• C1 10uF
• C2 .1uF
• D1,D2 3.3V zener diode (0.5W max!)
• R4 330ohm
• D3 LED