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RPN Scientific Firmware for the Spikenzielabs Calculator Kit
09-28-2017, 05:45 PM
Post: #21
RE: RPN Scientific Firmware for the Spikenzielabs Calculator Kit
Hello!

(09-28-2017 06:46 AM)Alejandro Paz(Germany) Wrote:  For like 14 € looks really good !

Just looked it up, the price actually is 10,59€ shipping included. One would have difficulties to buy the parts for that price. And I wouldn't know how to manufacture the laser-cut acrylic case.

This is the assembled (and working) calculator - next to a real calculator for size comparison. I didn't apply the labels and keycaps yet of course...

[Image: IMG13325_1024px.jpg]
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09-28-2017, 08:07 PM (This post was last modified: 09-28-2017 08:09 PM by pier4r.)
Post: #22
RE: RPN Scientific Firmware for the Spikenzielabs Calculator Kit
Nice project!

Little OT.

(02-24-2016 08:48 PM)securd Wrote:  Hi All,

I have always had a fascination with early scientific calculators, and I'm impressed by how the engineers in the 1970's did so much with so little. ...

to an Arduino port of the BigNumber arbitrary precision library, coded up high precision Taylor series approximations for the transcendental functions, and voila!

I agree that the engineers in 1970 did a lot. I also see that nowadays we do a a lot through libraries done by others.

Surely making a wrapper of a given library is not trivial, but doing everything by oneself would be a ultra challenge (and likely one won't have a final library as polished as the existing ones. At least not so quickly).

Wikis are great, Contribute :)
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