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2×2 RC Sequence Dec 2020

2×2 Rubik’s Cube

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From Punch Cards to Flash Memory Dec 2020

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Multi-Dimension Data Table using PyXLL (with video) Dec 2020

I coded a PyXLL macro that builds a multi-dimension data table (MDDT).

The native Data Table provided by Excel is useful but limited to two variables.

My version is set up for 5 independent variables and an unlimited (theoretically) number of dependent variables. Five was an arbitrary choice; some limitation is required here.

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Excel — Use dynamic arrays and conditional formatting to create a selection dependent menu Oct 2020

I built a short video demonstrating how to use dynamic arrays and conditional formatting to create a selection dependent menu.

Though I built this spreadsheet menu using Excel on a desktop machine, the spreadsheet file also works on an iPad ( ! ) and on an iPhone ( !! ).

Microsoft 365 is required.

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Gauss Profile Jun 2020

Quick read with live links to the Desmos app.

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The Inexpensive Ventilator — Are We Building These ?

khoitsma
Concept, General
Forrest Bird, history, inexpensive, ventilator
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Percussionaire — Bird Respirator History Wiki — Ventilator

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