# [FoRK] Minecraft Scientific/Graphing calculator - Sin Cos Tan Log Square root [video]

Eugen Leitl eugen at leitl.org
Thu Mar 22 07:16:23 PDT 2012

```(obvious analogies on how to lay out circuitry in 3d CAs)

Uploaded by SgtGodswordBerserker on Mar 19, 2012

Hello there!

Here is the project I've been working on ^.^

Specs: 6 digit addition and subtraction, 3 digit multiplication, division and
trigonometric/scientific functions. (The reason these are only 3 digits is
because multiplication and division would take a long time to
decode/complete/encode. Also, the fraction display is hard enough to build
for 3 digits, let alone 6 - 6 digit RAM would not only be massive, but a bit
pointless since the curves follow the same pattern surrounding the peaks.).
Graphing y=mx+c functions, quadratic functions, and equation solving of the
form mx+c=0.

The screen and keypad were always meant to be the main feature of this
machine. The main display boasts 25 digits. Square root signs are displayed
and can change to accommodate any number of digits. Square root signs, add,
minus, multiply and divide signs are displayed at appropriate times, and
there is a full fraction display. The 7-segments for the fractions are the
smallest possible, being only 3 wide, and stackable vertically and
horizontally.

The calculator itself is just over 250x200x100 blocks. It contains 2 6-digit
BCD number selectors, 2 BCD-to-binary decoders, 3 binary-to-BCD decoders, 6
BCD adders and subtractors, a 20 bit (output) multiplier, 10 bit divider, a
memory bank and additional circuitry for the graphing function.

Music: City of Innocence, Gem Droids, - Dan O'Connor - Royalty-Free music at
http://Danosongs.com Rocketry, Killing Time - Kevin MacLeod -
http://Incompetech.com

Thank you very much for watching. As you can probably imagine, this took some
effort to make, and so a like would be very much appreciated. =]

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