1 The Most Useless Machine EVER!??!!!
The classic useless machine, a box whose arm switches itself back off, linked as the reference design by people building one or borrowing the idea for auto power-off.
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The classic useless machine, a box whose arm switches itself back off, linked as the reference design by people building one or borrowing the idea for auto power-off.
Part of Jeremy Blum's Arduino series, driving a DC motor through a transistor; followed by beginners, who often then ask about base resistors and battery choice.