General electronics
Youtube:
Below are some links to good youtubers. Their channels contain a wealth of useful information about anything and everything. They are currently ordered in my preference of what to watch.
https://www.youtube.com/@EEVblog
https://www.youtube.com/@greatscottlab
https://www.youtube.com/@PhilsLab
https://www.youtube.com/@bigclivedotcom
https://www.youtube.com/@RobertFeranec
Blogs: