# Converting Audio into Voltage

**URL:** <https://forum.kirupa.com/t/converting-audio-into-voltage/322275>\
**Category:** random\
**Created:** [May 16, 2011, 6:48pm UTC](https://forum.kirupa.com/t/converting-audio-into-voltage/322275 "2011-05-16T18:48:28Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Rafflez](https://avatars.discourse-cdn.com/v4/letter/r/94ad74/32.png) [@Rafflez](https://forum.kirupa.com/u/Rafflez)\
**Post date:** [May 16, 2011, 6:48pm UTC](https://forum.kirupa.com/t/converting-audio-into-voltage/322275/1 "2011-05-16T18:48:28Z")

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Hi everyone,

I am a member of an educational group at my school and I proposed to my boss that we make a ferrofluid sculpture for future outreach events. She thought it was a great idea but now I have to figure out how to make it and I have no electrical experience. I would like to take an audio file (from an iPod or computer, maybe even a microphone) and turn that into variable voltage (or current) to make an electromagnet vary in strength. Can anyone help me figure this out?