Category Archives: Uncategorized

I’m on EEVBlog

At the Electronex trade show last week I bumped into Dave Jone from EEVBLOG. We got chatting about the polarization stuff I was working on, and after a few minutes Dave turned to me and said “Wait, why aren’t we … Continue reading

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Collatz Dominos

Warning: Level 5 cognitohazard ahead. Mathematicians especially susceptible. Proceed at your own risk: (More seriously, if you like puzzles/math, haven’t heard of the Collatz before, and have a big exam in the next couple of days, maybe skip this post?) … Continue reading

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Icosahedron

Here’s a model to demonstrate a little known trick of geometry. The verticies of an icosahedron (20 sided shape) can actually be created using only three rectangles at right angles to each other. What proportion do the rectangles have to … Continue reading

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Clockwork Waveplates – Polarization Calculations With Gears

I’ve been playing around with tangible versions of the Bloch/Poincare sphere previously, and I think breaking polarization down into 3 orthogonal dimensions (Stokes vectors) yields such a useful mental model of what’s happening with various complex systems. In the same … Continue reading

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Better Poincare Sphere

Here’s an update to the lasercut Poincare sphere I made previously. I was very happy with it as a desktop ornament, but it wasn’t quite the tangible intuition pump I was hoping for. I decided to remake it with the coordinates … Continue reading

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Desktop Qubit Model – Poincare and Bloch spheres

I have been playing around with the maths for some simple quantum systems recently. A lot of systems model operations performed on a qubit as rotations in three dimensions (The Bloch Sphere). Around the same time, I was playing with … Continue reading

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Guiding ships with Moire patterns

I was inspired by Tom Scott’s excellent video and links here https://www.youtube.com/watch?v=d99_h30swtM   where he talks about a particular type of “Inogon” light used to guide ships through channels or harbours. The patent is here: https://patents.google.com/patent/US4629325 and the military report on the … Continue reading

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Boxmaking jig – the “cladding ruler”

I often find myself making wooden boxes for projects, and my favourite way is with plywood and batons, glued and nailgunned together. I usually make the left and right box sides with batons reinforcing, then the top, bottom, front and … Continue reading

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My globe now featured on Tested

I’m pleased as punch that my project was picked up by the youtube channel Tested. Norm and Sean lasercut my Dymaxion globe here: I’m also glad they noticed a few of the features I spent time on (such as reusing … Continue reading

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How Big is the Universe – Exploring the Hubble Ultra-Deep Field

This is a way to visualise the size of the universe, and in particular how much of the sky the amazing ‘Hubble Ultra Deep Field’ picture takes up. https://en.wikipedia.org/wiki/Hubble_Ultra-Deep_Field The Ultra Deep Field is 2.4 arc-minutes wide (0.04 degrees), so … Continue reading

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