Looking for an old woofer...... (Dancing Non-Newtonian Fluid)

Projects
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A while back someone turfed subwoofer into the 3 week bin…
It only had some sort of digital input so I removed the old amp and installed a cheap (Aliexpress cheap) power amp and used the original power supply…

Started playing with non-newtonian fluids (long winded name for cornstarch and water) along the lines of this: https://www.youtube.com/watch?v=yoB0pM2VASg

Started off usign a signal generator then tried music… However after about 5 minutes I think I blew the speaker or the amp. It may work again once it cools down… Did not get any videos unfortunately…

Since this looked like fun I figure I could build a better system just meant for making the fluid dance. I have the amp and a power supply. Just need a 8" to 12" speaker (woofer preferably) to use. Perhaps a couple to work out the bugs…

So anyone got some old speakers gather dust they would like to see repurposed?

Here’s a picture of the non non-functioning setup:

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If it works again once cooled down I’ll post some videos…

6 Likes
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Turn off the amp, and push the cone by hand in-out. If you can hear scratching, then the voice coil is blown.

A cheap source of speakers are the thrift stores. There is an episode of Big Bang Theory with the guys playing with the same experiment.

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Issue with speaker turned out to be a loose wire…

Next up trying with some music…

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Very cool - be good at the VHS booth at VMMF next year.

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I’ll try to set it up for that purpose…

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Here is a try with some really bassy music:

3 Likes
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That’s going to feature in tonight’s nightmares

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