![]() If anything was missing, we think optional sound(s) to attempt to simulate what you might hear on a keypress, otherwise, that felt a little flat to us. Our math skills are right inline with our graphics and web design skills, so about the only other thing we can say is it also seems to work well. Preferences include settings like single instance, output to gif or text, keep the window on top, and more.įree42 looks identical to the HP-42S, at least as seen here. Other actions include the option to import or export programs, clear or show the printout. It also has two skins, realistic and standard. R||R: Parallel resistance of two resistorsĪll following programs are summarized in one file 42 HP-42S Calculator Simulator is am Open Source recreation of the HP-42S Scientific Programmable Calculator and HP-82240 Printer.įree42 has two calculators, binary and decimal. RC: Cut-off frequency of a passive RC lowp ass filter PTX: Resistance/temperature relation of Platinum type RTDs LC: Resonant frequency of an LC resonant cirucit Z: Impedance of inductor or capacitor at given frequency There was a recent wish for a command line utility to translate between txt and raw files of Free42 programs.X||Y: Parallel impedanze of two impedances from stack.Fitting 1.234 kOhm with E12 series resistors takes about 15 seconds on a battery powered DM42.) ![]() RFIT: Find two standard resistors to get (close to) a desired non-standard resistance value ( Program tests all possibilities without further intelligence.LP1: Transfer function of a first order low-pass filter.ESER: E-series for electrical components.More detailed documentation may be found in the source files itself. ![]() The following listings only give a short program description.
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