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Thingiverse user lalbritton created this Ideal Harmonic Transformer:

Was “Analog Sine/Cosine Calculating Machine”, but then I found the actual name for this device, which I really like.

It is a thing to hold, enjoy turning the crank, and look at. If you can’t find your calculator, and need to know the sine or cosine of an angle real quick, you can dial in the angle and read off of the Scotch Yokes. It also works in reverse.

I plan to paint one up, hang it on my wall, and use it to help explain Trig to my kids. I have built and assembled one.

This was initially going to be a simple design to help me learn Alibre. Simple was lost at some point, I’m afraid. I am thinking about adding a paper feed and pencil holder, so I can plot with it.

John Baichtal

My interests include writing, electronics, RPGs, scifi, hackers & hackerspaces, 3D printing, building sets & toys. @johnbaichtal nerdage.net


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Comments

  1. Anonymous says:

    it’s stupid question time!:  if one has generally avoided twitter™ is there any use for the “Reactions” (unrelated to chemistry) now appended here?  (see also: hey-you-kids-get-off’n-m’lawn)

  2. Anonymous says:

    it’s stupid question time!:  if one has generally avoided twitter™ is there any use for the “Reactions” (unrelated to chemistry) now appended here?  (see also: hey-you-kids-get-off’n-m’lawn)

    1. Tim Kemp says:

      Glad to see I’m not the only one who finds that annoying.  It seems to add nothing of value.  Perhaps it could be changed to be hidden unless one has a desire to see how many people wanted to say, “Hey look at this!”

      1. Anonymous says:

        Second the ‘hide’ button idea…

    2. Nick Taylor says:

      Well I guess the idea is to de-couple the conversation from the site… which is probably a good thing… and is (to a degree) what this commenting system does anyway, though not as well as it should.

      Most of the twitter “reactions” aren’t conversational though – they’re just re-tweets… and if you’re already here, there’s no point reading more recommendations to visit this page.

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