HeadUnitVolumeKnob

Putting this Arduino module between your aftermarket Android head unit with a rotary encoder allows volume control via the knob. Requires 2 n-channel MOSFETs to be driven from the Arduino Pro Micro

Hardware

This code has been written to run on an Arduino Pro Micro. It should be easy to port it to other Arduino boards.

Dependencies

This code depends on the CruisingGeekCommon library. Unpack that library into your Arduino libraries folder.

MOSFET board

If you are building this project and would like the mosfet board to switch the two external resistors, please contact me @ CruisingGeek@gmail.com

Wiring Diagrams

The following are wiring diagrams using both the MOSFET board and for generic MOSFETs