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Archive for 2011

Hexadecimal Sudoku

Tuesday, December 20th, 2011

At the request of a few persistent (and possibly masochistic) puzzle fans, I’ve added four collections of Hexadecimal Sudoku to the puzzle collection. These are 16 x 16 puzzles that use the 16 hexadecimal digits (0-F), instead of the nine digits used in regular Sudoku puzzles. This is a good puzzle to take on your […]

Fractal Music Box

Tuesday, December 13th, 2011

I made four of these laser cut music boxes as christmas gifts to my family. The pattern was generated with a Processing script, which I wrote. The lid contains an inlaid Hilbert space-filling curve. On each of the sides is a colorful J, representing each of my four family members (our names all begin with […]

Sudoku Troubleshooter #4 – XYZ-Wing

Thursday, November 24th, 2011

Troubleshooter #4: XYZ-Wing This is part of a series on puzzle solving techniques. If you are stuck on a particular Krazydad puzzle, drop me a note, and I’ll use this space to help you out. Michael wrote in an email: Dad, Good morning and an early happy thanksgiving. I really enjoy your puzzles and I […]


Monday, November 21st, 2011

Campanello from David Watson on Vimeo. Todd Kurt sent me the link to this very nice electro-mechanical doorbell, designed by David Watson. He provides detailed instructions on his website, along with a few other interesting projects. I’m currently fascinated with such mechanisms, and hope to build something similar using a set of tuned desk bells […]

A History of the Sky

Friday, November 18th, 2011


Thursday, November 17th, 2011

Chris Harrison’s visualizations

Tuesday, November 15th, 2011

Chris Harrison, a PH.D. student at Carnegie Mellon, has put together a really nice set of visualizations, often involving words, such as the color flower shown here. The rest of his website is full of some very cool research/fun projects as well. link

Astro Cantus – another Wheel of Stars

Monday, November 14th, 2011

Th new mobile app Astro Cantus plays the stars like a music-box, much like my own 2009 piece, Wheel of Stars. There are a few differences, however (I don’t doubt that it was conceived independently). Astro Cantus classifies the stars into 7 discrete pitch classes (based on spectral type), which gives the music a more […]

The Shared Experience of Absurdity

Friday, November 11th, 2011

Improv Everywhere‘s Charlie Todd gives a wonderful TED talk on two of my favorite subjects: wonder and delight.

8-bit Violin

Thursday, November 10th, 2011

For the past four years, Ranjit Bhatnagar has done something awesome every February: He builds an instrument a day for the entire month. One of my favorites is this 8-bit violin. On his site, you’ll find some great videos of the violin being played by experts. Ranjit has been doing this for a while, and […]