Sending Sound Through a Transformer

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Uploaded by on Nov 4, 2007

Playing around with a frequency generator, I sent a sound wave through a Transformer, bridge rectifier and capacitor and generated 56V DC. Also works with Mp3 of the frequency. This transformer happened to have a resonant frequency of 159Hz. Every transformer I tested had a different frequency.

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Entertainment

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Standard YouTube License

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Uploader Comments (singerxyz)

  • I like your enthusiam and willingness to experiment. Don't listen to any know-it-all naysayers. Having said that... I did wonder why you did't test amps and compare P=IV numbers. Otherwise, I am inspired by your vids.

  • because I never seem to measure amps correctly. If someone could replicate this experiment, measure amps and post the data, I'd be glad to help with the setup if needed.

  • Nice. At the resonance frequency this transformer is acting as an over unit.

    singerxyz, can u give us more details?

    This transformer is designed to step down from X volts to Y volts; Can u tell as the what's the values for X and Y?

    Drevtoobe, he used a rectifier (4 diodes) to convert AC to DC

  • It's a regular radio shack step down transformer designed to step down 120VAC to 12.6 VDC.

    (the label is in the video)

    Is that what you were looking for?

  • congratulations!

    you have rediscovered the basic function of a transformer!!!

    sorry.. but the Nobel price for that is already taken :D

  • keep in mind, the voltage is increasing, where this transformer is designed to step down

Top Comments

  • Good joke! You forgot about current and power. Voltage is not everything :P

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All Comments (31)

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  • @singerxyz A transformer is bidirectional of course ... it converts voltage to current or viceversa. Nothing new here. If the transformer is good and the frequency is centered in the frequency of the transformer, the loss can be very small, but never zero and never less than zero of course!

  • Naw man, lol youre just stepping up the voltage from the headphone jack, XD

  • really great upload, thanks!

  • @singerxyz Call me skeptical, but it's normal for a transformer to work either way, due to Lenz's law. You can transform 12V to 120V, as long as the input is a.c...

  • I think your problem is that the output impedance of your computer and your MP3 player is quite high, probably for earphones it's at about 1kohm, so your current is a few mA into the secondary of your transformer, it becomes even less on the output, so that's not going to be much good for charging stuff.

  • sirmikeydotcom..

    . this is interesting, Did you seen the vid on youtube? the name?

    Thanks

  • ... yes, but so what? Transformers are able to work both ways. As encodion said, you are simply showing a tranformer doing exactly what it is supposed to, and expected to do.

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