Slow Motion String Vibrating

Conductive string with low freq signal applied, causing current flow to create magnetic field, which interacts with permanent magnet. Same principle as a speaker voice coil except this is not coiled but rather a single thread. You can see the nodes/antinodes that form.

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Science & Technology

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• CIMG2198

[krouviere]

Hi Grant. Well for this, I simply used a function generator to create the signal I applied to the thread. You can google for "function generator" to find some examples. I tried to attach a link here but it did not work. Function generators are great for experimenting. I simply used the sine wave output and turned up the voltage enough to drive current through the conductive thread. The current produces the magnetic field, which interacts with the permanent magnet, making it move.

[IAMGRANT1991]

If you don't mind me asking, how are you applying the low frequency signal? is it an electrical current? (I'm making a sort of self playing music box for a university project using an arduino but have very little physics knowledge, but great interest) Is there a technical description or circuit diagram anywhere I could take a look at?

Thanks

Grant.

[Quinzio]

Nice experiment