Used copies of the HP 35s now clear two hundred dollars, and the SwissMicros machines that carried the reverse Polish habit forward sit even higher, around three hundred ten dollars for a 42n. Inevati Systems wanted that kind of calculator back: programmable, comfortable on an engineering exam, able to graph, handle matrices, store expressions, solve […]
Arquivos de Tag: Calculator
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A pocket-sized adding machine that costs two dollars in filament and a dab of oil should not work. This one does. YouTuber 3D All Workshop spent two months designing, reprinting, and oiling a fully FDM mechanical calculator that uses no screws, no metal springs, and no electronics, then showed the whole fight in a video. […]