3 ms·
Making Transistors from Rocks [video]
- peter_d_sherman 5y agoRelated: "The 'P.W.' Crystal Experimenter's Handbook" (Apparently from 1925): http://earlywireless.com/pdf/pw_xtal_experimenters_hdbk.pdf http://earlywireless.com/pdf/pw_xtal_experimenters_hdbk.pdf