friction used as 3d printed transistor/resistance[0] graphite powder circuitry experiments[1a][1b] simple transistor projects[2] total pile high deeper math

friction used as 3d printed transistor/resistance[0] graphite powder circuitry experiments[1a][1b] simple transistor projects[2] total pile high deeper math geek origami/kiragami mechanical approach[3] pneumatic logic gates[4]; rotational logic gates[5]; gears/marbles/dominoes[6] ----------- transistor logic gates : https://www.youtube.com/watch?v=OWlD7gL9gS0 https://www.youtube.com/watch?v=OWlD7gL9gS0 [0] 3d printed logic : https://hackaday.com/2019/03/02/3d-printing-logic-gates/ https://hackaday.com/2019/03/02/3d-printing-logic-gates/ [1a] graphite circuits : https://hackaday.io/project/21622-graphite-circuitry-experiments https://hackaday.io/project/21622-graphite-circuitry-experim... [1b] https://www.instructables.com/Paper-Electronics-Conductive-Paints-Inks-and-Mo/ https://www.instructables.com/Paper-Electronics-Conductive-P... [2] simple transistor projects : https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/Author-Groups/Tom-Kneitel/103-Simple-Transistor-Projects-Kneitel.pdf https://www.worldradiohistory.com/BOOKSHELF-ARH/Technology/A... [3] : https://www.nature.com/articles/s41467-023-42323-1 https://www.nature.com/articles/s41467-023-42323-1 [4] : a) https://www.instructables.com/3D-Printed-Pneumatic-Logic-Gates/ https://www.instructables.com/3D-Printed-Pneumatic-Logic-Gat... b) https://www.youtube.com/watch?v=IxXaizglscw [5] https://www.youtube.com/watch?v=8ghvEe5N--U https://www.youtube.com/watch?v=8ghvEe5N--U [6] https://www.youtube.com/watch?v=kQeDnFUNW-Q https://www.youtube.com/watch?v=kQeDnFUNW-Q