3 Simple Ways to
Share What You Make

With Instructables you can share what you make with the world — and tap into an ever-growing community of creative experts.

PhotosPhotos

Share one or more photos of a project, recipe, or whatever you've made, quickly and easily.

Get Started

Learn more & Get Tips

Step by StepStep-By-Step

Share your step-by-step photos with text instructions of what you made so others can do it too!

Get Started

Learn more & Get Tips

VideoVideo

Share your how-to video. You'll need your embed code from a video site such as YouTube.

Get Started

Learn more & Get Tips

Favorite

Sine Wave Machine

video Sine Wave Machine

Here's a quick video of a hand made prototype I knocked together to demonstrate mechanization of amiiform motion for a class I'm taking .

14 comments

Apr 7, 2011. 1:57 PMlerickson says:

Technically couldnt this be a cosine waves also???

Oct 16, 2010. 3:47 PMLefrançois says:

Avec un système de cames, on a un bateau à rames.
With a cam system is a rowing boat.

Jul 14, 2010. 1:34 PM

mattthegamer463 says:

I love this. Are the cams that you used circular and mounted off center for the motion, or are they elliptical? Very very cool machine.

Jul 26, 2010. 12:28 AMcurlyfry562 says:

If I remember my trig class correctly they should be circles mounted off center.

Jul 20, 2010. 2:57 PMbigt4616 says:

looks like the bamboo sticks or whatever they are are being held down against with what looks like a rubber band. and the rubber band is holding the stick against the eliptical cam.

Jul 16, 2010. 5:23 PM

NachoMahma says:

. If I understand the Wikipedia page on phasors, it's a circle. You should verify that with a real mathematician.

Jul 16, 2010. 9:37 PM

mattthegamer463 says:

Yes, the sine wave does represent the amplitude of a circle, however, when shown over time, the phasor turns into a sine wave. The phasor only exists in pure math: it is always with respect to time when it is the real world.

Jul 23, 2010. 4:43 PMdrbill says:

Add SMD LED's to the tips and run it in the dark would be way cool.

Jul 14, 2010. 2:35 PM

Ninzerbean says:

Cool - do an 'ible.

Jul 15, 2010. 9:08 PM

Goodhart says:

Fits right in there with that box that, when you turn on the switch, it reached up and turned it off again LOL

Jul 15, 2010. 7:04 PMluvit says:

i hate jack-in-the-box. who invented that anyway?

Jul 15, 2010. 4:02 PM

Skyfinity says:

I liked the midi pop goes the weasel. Very nice. Also, the machine was quite elegant.

Jul 14, 2010. 2:52 PM

MichelMoermans says:

probably because I'm really tired but at first I thought the sticks made the music somehow :p

But that gave me an idea, you should totally put a keyboard under there :p It will play the same tune over and over again but who cares it would be awesome ^^ And I think you can rig the 'fingers" easily to play the note you want when you want :)

just a thought that came to mind though :)