Category: Concept
Engineering Cost Estimates Jul 2021
Uncertainty analysis illustrates simple but often ignored concepts.
Feet Inches Sixteenths (FIS) Calculator Jun 2021
The Suez Canal — How Ships Float May 2021
I started thinking about the support of floating ships — in detail.
2×2 RC Sequence Dec 2020
2×2 Rubik’s Cube
From Punch Cards to Flash Memory Dec 2020
Multi-Dimension Data Table using PyXLL (with video) Dec 2020
Excel — Use dynamic arrays and conditional formatting to create a selection dependent menu Oct 2020
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.
Gauss Profile Jun 2020
Quick read with live links to the Desmos app.
The Inexpensive Ventilator — Are We Building These ?
Percussionaire — Bird Respirator History Wiki — Ventilator