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Banksy Artwork Self-Destructs At Auction Right After Being Sold For $1.3 Million (cbsnews.com)
OpenSourceAllTheWay writes: Elusive street artist Banksy's famous "Girl With Balloon" artwork was on sale at a Sotheby's auction in New York inside what looked like a normal, if slightly old fashioned painting frame. As soon as the auction concluded — the artwork was sold to a bidder for a cool $1.3 Million — a whirring noise started coming from the artwork hanging on the wall, and "Girl With Ballon" started moving down inside its frame, coming out the bottom of the frame in shredded strips. In what must be an art world first, the artwork suddenly self-shredded in front of hundreds of stunned auction attendants. It appears that — somehow — Banksy or some other prankster installed a battery powered paper shredding mechanism in the bottom of the artwork's frame that can be remotely triggered. In a tweet on his Twitter account, Banksy posted an image of the destructed artwork and wrote "Going, gone, gone...", potentially mocking the practice of auctioning famous artworks off for large sums of money. The question now is precisely what — if anything — the buyer of the artwork gets for his or her money, and whether "Girl With Balloon" is worth more or less than before now.
Here: https://www.cnn.com/style/arti...
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Finally, I presume that the shredder was controlled by something like a cell phone - I presume there would be a big honking battery in there because I would have to think would be days/weeks between receiving the art, having it on display and then starting the auction.
As I said, very cool hack, but I can't believe that Sotheby's was surprised by it.
Apparently it was in storage for some time, but it was authenticated a short time ago by Pest Control. That would have given them the opportunity to change or charge batteries. Whether or not Sotheby's knew is anyone's guess. I suppose it is possible that Pest Control shushed up the Sotheby's people responsible for supervising them, and perhaps the auctioneering staff didn't know.
Even those who arrange and design shrubberies are under considerable economic stress at this period in history.
https://youtu.be/ShcX_Zvn9WU
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The artist posted this himself: https://www.instagram.com/p/Bo...
For this to have worked, the frame must be quite heavy to allow the shredder mechanism to be hidden within a hollowed out area and not be noticed by being heavier at one end. Along with that, the canvas must have seemed to be mounted in an atypical fashion so that the feed and guides were invisible. Finally, I presume that the shredder was controlled by something like a cell phone - I presume there would be a big honking battery in there because I would have to think would be days/weeks between receiving the art, having it on display and then starting the auction.
I disagree.
First hardwood frames are REALLY heavy, like surprisingly so. The shredder mechanism isn't going to be an office-type shredder which can handle 6 sheets at once and has a service life of thousands of sheets. It had to shred half a thing once ever. So, it could be of a much lighter construction; it's not like banksy had to worry about it getting blunted through use.
For the power source, a stack of primary lithium AAs would be more than adequate. And they have a very long shelf life (95% after 20 years).
http://data.energizer.com/pdfs... (page 14)
Triggering is an interesting one. Banksy was clearly there or sent someone there since he's subsequently posted a video of the shredding. So, the triggering could have been local either by RF or infra-red. That leads to a lot of interesting options. Sensors based on those are much, much lower power than a cell phone. And you could do something like wake up for a second every hour to listen for a signal, then either deep sleep or stay alert depending.
It would take some decent EE nouse to design that to last for a long time, but then again a smoke alarm can last a decade off a lithium PP3, and this thing could have had a lot more battery power in it.
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