>>11078969>>11080107>>11080111I have personally build a NPN bipolar junction transistor from scrap. It was technically possible since at least the late 1800s but we didn't have the information to know that doped silicon would behave in this way thus it was never manufactured until the 1940s brute force led to its founding.
You have 2 types of innovations. One is innovation of understanding. Knowing how something works suddenly makes it possible because it's not hard to manufacture. Things like anti-biotics and transistors fall in this category.
You also have innovation of production where things only become possible after the tools are advanced enough to build things at such a precision and reliability for it to become a genuine product. Things like the steam engine and the atomic bomb fall within these categories.
However the things I named
>>11080067 were specifically named for being extremely easy to manufacture with handheld tools let alone industrial capacity. There's a reason why I didn't name personal computers or smartphones or anything like that. LCD screens are a manufacturing nightmare.
The majority of progress made from 1919 to 2019 has been due to better understanding and revolutions made in electrical engineering which is why an electrical engineer being send back to 1919 could do most of the innovation since they are mostly innovations of understanding. Not of precision based manufacturing.
