Well, i thought this guy is worth mentioning here. 22 year old Sam Zeloof tinkers his own chips and has reached 1200 transistors on one wafer. See the huge article on “Wired” published in “Business” on the 20.01.2022 7am. First microprocessor in the western world is Intels 4004 sporting 2300 transistors. So this is quite something. Next step would be, to try to start from sand (mainly silicondioxide)…