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TechnicalImpulse

@technicalimpulse.bsky.social
71 followers 85 following 100 posts

Applied mathematics and software guy. Making stuff from wood, metal, electronics. Go (== baduk == weiqi). Dogs, especially golden retrievers. Music fast and loud but still melodic. Pushing back at fascism is always worth the effort.

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TechnicalImpulse @technicalimpulse.bsky.social · 14/09/2026
As an occasional amateur machinist, I always wanted a surface grinder. Finally found a little benchtop one on Craigslist. Now how do I move it into the backyard shed? This baby weighs 250 pounds or so.
A small surface grinder sitting on a trailer.
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TechnicalImpulse @technicalimpulse.bsky.social · 27/07/2026
At the US Go Congress this week. Playing more serious games over a physical board than I have in years. #Weiqi #Baduk #Go
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TechnicalImpulse @technicalimpulse.bsky.social · 04/07/2026
Cherry picking time.
Ripe sour cherries, on the tree.Ripe sour cherries, in a basket.
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TechnicalImpulse @technicalimpulse.bsky.social · 28/03/2026
I've been computationally searching for polycube puzzles. Exercise: find a 7-cube, 9 copies of which fit in a 4x4x4 cube. Bonus points for multiple solutions placing the singleton unfilled cube in different places. #math #puzzles #combinatorics
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TechnicalImpulse @technicalimpulse.bsky.social · 14/03/2026
So there are 63 Bedlam siblings. They all have different numbers of solutions. The original puzzle has 19186 solutions. Its siblings range from 16457 to 30613 solutions. 2/2 #puzzles #combinatorics #block-packing
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TechnicalImpulse @technicalimpulse.bsky.social · 14/03/2026
The Bedlam Cube has 7 chiral pieces. (Chiral = no plane of mirror symmetry.) Reflecting the whole set would, of course, have the same set of solutions (mirrored). But reflecting only some of them results in a whole new puzzle. 1/2 #puzzles #combinatorics #block-packing
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TechnicalImpulse @technicalimpulse.bsky.social · 13/03/2026
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TechnicalImpulse @technicalimpulse.bsky.social · 12/03/2026
It's well known that Sudoku can be written as an Exact Cover problem. But upon browsing Sudoku's lesser-known siblings here: www.nikoli.co.jp/en/puzzles/ it strikes me that many (most?, all?) are also equivalent to Exact Cover. Anyone done a comprehensive study? #puzzles #sudoku #combinatorics
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TechnicalImpulse @technicalimpulse.bsky.social · 18/04/2025
It's a bowl. It's a cutting board. It's half-way in between. For cutting dry ingredients (think nuts or chocolate) that have a tendency to spray little pieces all over.
A shallow bowl cut into a thick cutting board.
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TechnicalImpulse @technicalimpulse.bsky.social · 06/02/2025
Replaced my Jumbo Jaws with Mega Jumbo Jaws. Spoiler: they're not 10^6 times as big. Nonetheless, they let me finish the bottom of this 12" dia bowl that had been sitting on the shelf. Swamp maple, cracked and spalted. #woodturning #woodworking
12" diameter bowl, spalted maple, mounted in the jaws of a wood lathe.
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TechnicalImpulse @technicalimpulse.bsky.social · 18/01/2025
Borromean Rings. Oak. Each ring is an oval, about 4"x7". #woodworking
Each ring is an oval, made of red oak.  The 3 rings interlock, but no two rings are hooked together.
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