@Freyrs_stories
A large and long Carrington event could / would send us back to the industrial revolution, only worse as all the knowledge of how to make everything between now and then is either in obscure tomes or digital, retrieving either would take serious time and skill if it was possible at all.
Replacing many of the technologies of the "Computer Era" c.1990+ would be extremely difficult (if not impossible for decades or more). However, rebuilding back to the "Atomic Era" c.1945 to ~1985 is much more do-able.
Replicating components of the "Computer Era" requires "clean rooms" printed circuits, super conductors, etc. However, to produce many components and complete mechanisms, even the first atomic bombs was done by handcrafting. Mass Production was vital to the Allied (in particular USA) victory in WWII. Don't forget that much of the material produced by the Union c.1860-65, of the UK c.1914-1918 and even in WWII (not to mention Germany) was assembled by hand. (Assisted by assembly lines, hoists, lathes, etc. yet in the end Germany was compelled by limited resources and Allied bombing to function more as small craftshops than industrial mass production.
Components of the Atomic Bombs were handcrafted. Some because they were unique, literally One of a kind. Sometimes, due to the extreme secrecy scientists or technicians had to craft items because they weren't able (allowed) to explain what they needed, so they had to build it themselves.
Guys in their late teens and early 20's sometimes hand crafted "replacement" parts for radars, radios, and other highly technical equipment, at isolated jungle airfields in the middle of the Pacific.
Knowing a Thing has been done, and what you need is a tremendous advantage to the initial discovery. Many of our major breakthroughs were not because someone intended a particular thing, but because they were working on something else, and it didn't work... but then they, or someone else said, Hey! What if we used your thingamajig for to do this Other thing?
The Erie Canal, steam engines, and the Wright Flyer were all crafted from hand using components at hand.
Then there are books such as: THE WAY THINGS WORK An Illustrated Encyclopedia of Technology
New York: Simon and Schuster, 1967. Ninth Printing. Hardcover
There is a series of books with the same title, but a different author, published in the mid-80's and revised in the 90's and 21st century. Millions of such books exist, often owned by individuals who have interest in various such technologies.
Many such books, as well as the knowledge to use an old automobile alternator with a "small" windmill to generate electrical power, or how to fix a pump, etc. seem to be more common in rural areas. The urban areas where so many count upon "On Time Delivery" and don't have a weeks worth of food, nor a medical kit to treat survivable injuries worse than a "paper cut" are all too common.
The ability to rebuild to an 1860's or even 1950's level of technology, at least on a limited-local scale is quite possible.
