You might appreciate a deep dive approach. Rheingoldheavy did a tremendous exploration into the underlying circuitry of an Arduino Uno [1] I would also check o

You might appreciate a deep dive approach. Rheingoldheavy did a tremendous exploration into the underlying circuitry of an Arduino Uno [1] I would also check out Chris Gammel's Contextual Electronics [2] as a semi-formal training course. It's also an opportunity to make connections with other EE's you can ping when you get "stuck" Finally, invest in your tools! Get yourself a decent multimeter- if you aren't sure where to start, Dave Jones' EEVBlog [3] will provide more commentary than you expected. Having a good oscilloscope and logic analyzer also makes worlds of difference when you're troubleshooting a circuit. Digilent's Analog Discovery 2 [4] is a great get-you-started instrument. [1]: https://rheingoldheavy.com/build-an-arduino-uno-from-scratch-part-1/ https://rheingoldheavy.com/build-an-arduino-uno-from-scratch... [2]: https://contextualelectronics.com/ https://contextualelectronics.com/ [3]: https://www.youtube.com/watch?v=xdGQEVdxmQQ&t=414s https://www.youtube.com/watch?v=xdGQEVdxmQQ&t=414s [4]: https://store.digilentinc.com/analog-discovery-2-100msps-usb-oscilloscope-logic-analyzer-and-variable-power-supply/ https://store.digilentinc.com/analog-discovery-2-100msps-usb...