calculator

EXPORTING DATA FROM OLD GEAR THROUGH LCD SNIFFING

[Jure Spiler] was at a flea market and got himself a spectrophotometer — a device that measures absorbance and transmittance of light at different wavelengths. This particular model seems to be about 25 years old, and it’s controlled by a built-in keyboard and uses a graphical LCD to display collected data. That might have been acceptable when …

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Arduino Timing Belt Calculator (console)

This command-line Python script is a utility to help calculate parameters for timing belt drive systems. A more general discussion of designing with timing belts can be found on the Timing Belt Guide pages. Installation Requirements The code requires a working installation of Python 3 with scipy. For suggestions on setting up your system please see Python 3 Installation. …

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CELEBRATING THE 4004’S 0X31ST ANNIVERSARY

This weekend marked the 49th anniversary of the legendary Intel 4004 microprocessor, and to celebrate [Erturk Kocalar] combined the old and new in this intriguing Retroshield 4004 / Busicom 141-PF calculator project. We have reported on his Arduino shield project before, which lets you connect a variety of old microprocessors to an Arduino so you can experiment with these …

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EAGLE 8.7 – Parametric 2D & 3D model generation, library.io, more!

tl; dr?  library.io, IPC-compliant 2D & 3D model generation, copy and paste pins from a datasheet to a symbol, WAY better highlight / color controls, SPICE supports saving and comparing waveforms + better plot controls, router now contours with 90 degree bends, & a bunch of little (but important workflow/UI/UX improvements). Greetings EAGLE Community! Today …

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POCKET SIZED ARDUINO CALCULATOR MAKES A GREAT FIRST PROJECT

We’ve all got calculators on our phones, in our web browsers, and even in the home “assistant” that’s listening in on your conversations all day on the off chance you blurt out a math question is can solve for you. The most hardcore among us might even still have a real calculator kicking around. So in that …

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