Author Archives: mechatronicsguy

Do flat tyres make your speedo lie? (Part 2)

OK, I decided to do a bit more testing, using the CANBUS data of the car, given that a few people have pointed out that “Indirect TPMS” (Tyre Pressure Monitoring Systems) exist, and use the ABS wheel encoders to infer … Continue reading

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Do flat tyres make your speedo lie?

This is a question that I’ve seen debated a few times, both in person and on the internet. It’s not quite in the same league as the immortal argument starter “airplane-on-a-treadmill”, but it has many of the same features. To … Continue reading

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Display box for a KP1-4 High Voltage Variable Cap

I was recently at the Central Coast Amateur Radio Club’s annual get together. And I saw this beautiful glass vacuum tube there. It’s a vintage Russian KP1-4 high voltage capacitor. Basically two metal plates in a vacuum separated from each … Continue reading

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Spiral Music Visualization using Teensy or Python

Here’s a project I finished a couple of years ago, but never got around to posting. It’s a way to visualize music differently to the standard notation. The notes are wrapped in a spiral fashion, with one rotation per octave. … Continue reading

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Origami Maths – Face Graph of a Hypercube

Here’s a quick little project I never got around to writing up. A while ago I was doing a dive into group/category theory and playing around with graphs of various polytopes. I wanted to make a model of the faces … Continue reading

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Roman Dodecahedrons – Part IV

Examination of the Hypothesis: The hypothesis I put forward in the last post I think has great merit. In particular: This hypothesis explains the consistent presence on the dodecahedra of their two most defining features; the nodules and the varying … Continue reading

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Roman Dodecahedrons Part III

I was pretty happy with my previous hypothesis on the dodecahedron, the string idea fits so well with the observed shape of the nodules, and the device is very satisfying to use and play with. However one thing that it … Continue reading

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Roman Dodecahedrons Part II

This is a continuation of part I on Roman Dodecahedrons. Games on a Dodecahedron: So I’ll go on to explain why I think it’s a string puzzle, but first I want to mention what my criteria for an acceptable answer is. … Continue reading

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Roman Dodecahedrons Part I

I recently came across these fascinating old Roman artefacts: https://en.wikipedia.org/wiki/Roman_dodecahedron Several hundred of them have been found, all around Europe, and what the purpose of them is is considered a mystery. Some things to note about the dodecahedra: They all … Continue reading

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Homemade Pomodoro timer

Like most people, I’m stuck at home right now. Trapped, in an environment which is under my full control, and I’m surrounded by my books and technical resources, and free to do whatever I choose, whenever I choose. Which, it … Continue reading

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