david_megginson, 1 month ago to Sliderules Solving 2×2=4 is the #HelloWorld for any slide rule with the basic D and C scales, including the #CardboardComputer: Adjust the wheels (or slide) to put 2 above 1 Keeping the alignment, read 4 over 2. Not so hard, was it? There's a lot of unnecessary mystification around #slideRules, but they're simple tools at heart. You can also try this with the online simulator at https://cardboard-computer.org #DiY Closeup of a homemade circular slide rule showing 4 on the outer D scale above 2 on the inner C scale.
Solving 2×2=4 is the #HelloWorld for any slide rule with the basic D and C scales, including the #CardboardComputer:
Not so hard, was it? There's a lot of unnecessary mystification around #slideRules, but they're simple tools at heart.
You can also try this with the online simulator at https://cardboard-computer.org
#DiY
Closeup of a homemade circular slide rule showing 4 on the outer D scale above 2 on the inner C scale.
david_megginson, 1 month ago to Sliderules I tried a prototype of the #CardboardComputer with paper glued onto thick, corrugated box cardbord. It's easy to use, but looks messy. https://cardboard-computer.org #slideRules #DiY
I tried a prototype of the #CardboardComputer with paper glued onto thick, corrugated box cardbord. It's easy to use, but looks messy.
https://cardboard-computer.org
#slideRules #DiY
david_megginson, 1 month ago to Sliderules #CardboardComputer prototype no. 2 (advanced version) solving the problem 5×25=75. I cut the plastic cursor out of some stiff plastic "clamshell" packaging I pulled from the recycling bin. Lessons from this iteration: Be more careful drawing the hairline on the cursor next time. Precise wheel alignment is very important, and I need to cover that more in the DiY instructions. I'm going to glue these onto cardboard backings. #slideRules #DiY
#CardboardComputer prototype no. 2 (advanced version) solving the problem 5×25=75.
I cut the plastic cursor out of some stiff plastic "clamshell" packaging I pulled from the recycling bin.
Lessons from this iteration:
I'm going to glue these onto cardboard backings.
david_megginson, 1 month ago to Sliderules What's a Thursday without more #CardboardComputer news? 🙂 There is now a home page with a virtual version that you can drag around manually to solve problems. The basic and advanced exercise pages now have help deeplinks directly to the relevant sections in the guide. (I learned a bit making touch events work with SVG on mobile devices.) https://cardboard-computer.org #slideRules #DiY #SVG
What's a Thursday without more #CardboardComputer news? 🙂
(I learned a bit making touch events work with SVG on mobile devices.)
#slideRules #DiY #SVG
david_megginson, 1 month ago to Sliderules The #CardboardComputer is looking spiffy with the @creativecommons CC0 Public Domain Mark attached. https://cardboard-computer.org #SlideRules #PublicDomain #CreativeCommons
The #CardboardComputer is looking spiffy with the @creativecommons CC0 Public Domain Mark attached.
#SlideRules #PublicDomain #CreativeCommons
david_megginson, 1 month ago to Sliderules First working prototype of the #CardboardComputer, calculating the Answer to Life, the Universe, and Everything. https://cardboard-computer.org #slideRules #DouglasAdams
First working prototype of the #CardboardComputer, calculating the Answer to Life, the Universe, and Everything.
#slideRules #DouglasAdams
david_megginson, 1 month ago The printable templates for the #CardboardComputer are available now at https://cardboard-computer.org/templates.html (There are also PDFs in A4 and US Letter sizes, in case your browser doesn't print properly.) #slideRules #DiY
The printable templates for the #CardboardComputer are available now at
https://cardboard-computer.org/templates.html
(There are also PDFs in A4 and US Letter sizes, in case your browser doesn't print properly.)
david_megginson, 1 month ago There is also a detailed guide, including a very short Quick Start for addition and multiplication: https://cardboard-computer.org/guide.html#quick-start #CardboardComputer #slideRules
There is also a detailed guide, including a very short Quick Start for addition and multiplication:
https://cardboard-computer.org/guide.html#quick-start
#CardboardComputer #slideRules