Author Archives: mechatronicsguy

This is a quick project I made to explore dichroic filters. I just love the colours that can be produced, and wanted a way to display it easily. In the last few years, these dichroic cubes have appeared on eBay. They’re used … Continue reading →

I recently saw this amazing idea from Darren Schwenke on Hackaday.io: https://hackaday.io/project/164732-mprt-modified-planetary-robotics-transmission Which is (so far as I know) a brand new type of gearbox, inspired by a well known concept called a  “Harmonic-Drive“. Harmonic drives have been around for … Continue reading →

This is a quick and dirty way to get a whole bunch (up to 17) small stepper motors working off a single arduino, with no extra circuitry whatsoever. Why would you want to do that? Maybe you want to make … Continue reading →

Unintentionally I’m going to continue my tradition of making projects involving rulers. I saw this picture online: https://imgur.com/t/aiko/mu96ohu and I thought it was too cute a technique not to try out for myself. I did a couple of minutes sketching in … Continue reading →

Here’s a quick project to make it easier to draw examples of interference patterns and wave behaviour. I call it Huygens’ Ruler: It’s based on the idea of Huygens’ principle, the idea that every point on a wavefront becomes the source … Continue reading →

Here’s something I was planning to make ages ago, as part of the Bloch Sphere project, but it slipped my mind. It’s a visual demonstration of how the Born Rule, which describes how complex ‘probability amplitudes’ are related to probability. … Continue reading →

Here’s something I came up with today to make it easier to organise sewing thread. The problem is how to organise about four or five tubs worth of these: As an experiment, here’s what the exact same collection would look … Continue reading →

(With sincere apologies to both Sir William Bragg, and also Sir William Bragg. I’d have loved to meet you both, and also see your famous bubble raft demo in person!) At a late stage in the spiral double slit project, … Continue reading →

Here’s a brief F.A.Q. for things I’ve been asked about the spiral & the double slit experiment. Q: First off, what the actual directions of the plot correspond to? Good question.  In the original 2D graph, one axis was distance … Continue reading →