Category: Calculators

Replacement of the HP15C

Are you looking for a replacement of the Hewlett-Packard HP15C calculator? Then look no further,  check out the following replacement I found, its the DM15L from swissmicros I had the HP15C for years and I can not find it, I searched everywhere. So after looking at eBay, Amazon and so on with these prices for …

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3D print a new HP 28S case

3D model HP28S parts

Creating a new HP28S case or 3D print a new HP 28S case I am working on creating a 3D image file in order to 3D print a new HP28S calculator case. So the question is: How to 3D print a new HP 28S case?My keyboard on the calculator had one row which would not …

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Open a HP 28S calculator

HP28S with Leister heatgun

How to open a HP 28S calculator If you never opened a HP28S clam-shell calculator then here is a how to open a HP 28S calculator. This is quite a challenging task in trying to figure it out. I did quite a bit of searching and trying before documenting this post.  Why would you want …

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