Three levels of electronics courses with circuit analysis, electronic functions, and soldering.
For my electronics final project, I was inspired by the Nadine Bass microphone from Ear Trumpet Labs to create a large diaphragm condenser mic that would seamlessly mount to a cello's endpin and maintain the warmth and clarity of a large diaphragm capsule. The main challenge was finding the best technique that would minimize dampening of the instrument's vibrations but I ended up with a screw clamp design that put the weight of the mic on the end pin and the metal gooseneck could be sturdily positioned.
Built a compressor designed by Micheal Stucker modeled after Universal Audio's 1176 compressor