Brock used an arduino to generate glockenspiel sequences from a magnetic stripe reader. The casual video demo (with some charming text corrections) demonstrates how Arduino can make physical projects much more approachable for newcomers. - Brockenspiel [via]
Related:
DIY doorbell(s)
From the pages of MAKE:
MAKE:01 p.108 Magnetic stripe reader - subscribers, read this article now in your digital edition
Posted by Collin Cunningham |
Apr 11, 2008 01:00 PM
Arduino |
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Isn't he worried about people stealing his credit card number based on the sound frequency? I would assume not because he doesn't appear to be worried, but shouldn't he be?
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yup, all you gotta do is record the sound, and you have the number. there is some variability because 9's and 0's are represented as silence.
i mean, there's still that 3-digit security code on the back, so it shouldnt be too much of a worry.
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You could also run the data through some sort of one-way hashing function, which would still provide a unique signature for each card, but would make it hard to map the sounds back to numbers :-)
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