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The Magic Cafe Forum Index » » Penny for your thoughts » » Effects using gray code and hamming codes (0 Likes) Printer Friendly Version

Nir Dahan
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Inner circle
Munich, Germany
1390 Posts

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Hi all,
I am interested in effects using the gray code numbering system or hamming codes. I know elmsley in one of his books has a few effects called the liar matrix which is based on distance 3 hamming codes.
does anybody know about more effects, and could give references?
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Gibsons, BC, Canada
2194 Posts

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The Café had some database problems and lost a day's worth of postings. Mine was one of them... I had observed that Leo Boudreau's books (such as Skullduggery and Psimatrika) are filled with effects based on Gray codes (and some other related ideas). Unfortunately, they're out of print and difficult to find.

I have an interesting such effect (Shades of Gray) in the October 2002 special issue of Center Tear magazine.

... Doug
Doug Dyment's Deceptionary :: Elegant, Literate, Contemporary Mentalism ... and More
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1143 Posts

Profile of TomasB
Just thought I'd mention that effects like these doesn't use Gray Codes as they only differ in a single position when you move to an adjecent codeword. DeBruijn Sequences on the other hand seems to be exactly what is used.

Leo's work on it absolutely rocks. Try to get your hands on his books.

Ulf Richter
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51 Posts

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My post was lost, too. There are some great routines using Gray codes in T.A. Waters' Mind, Myth & Magic (aptly titled Grayze, Grayce etc.).
Alan Jackson
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Cardiff, UK
432 Posts

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There are examples (simple and not so simple) in "The Collected Works of Alex Elmsley".
There are 10 kinds of people: those who understand binary numbers, and those who don't.
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