Old guy, education in maths and physics, stood next to a computer for too long back around 1990 and was told I was a programmer. Spent a couple of decades doing telco.

Picked up a masters in nano-tech somewhere along the way. Time domain modelling of Gold nano structures - FDTD and Transmission Line Matrix at optical frequencies.

Currently doing what you would call hobby electronics. Valve amp simulations at the moment. Basically teaching myself electrical engineering. Have loose ideas of using a micro-controller to control a tube amp - for no particular reason.