Author Archives: mechatronicsguy

Just a quick one this time. Here’s a simple lasercut design for a ‘contact goniometer‘ which is used for measuring the angles between two faces of a crystal.   It’s lasercut from 3mm acrylic, and to make the engraved text … Continue reading →

I’ve been getting into molecular modelling recently, and I wanted to experiment with different ways of making my own models cheaply and easily. I liked the colour scheme and layout of the CPK modelling made by Linus Pauling and others, but … Continue reading →

I’ve been reading up on crystallography recently for an upcoming project, and I was having a hard time wrapping my head around Miller indices. I kinda got it, but I wanted something tangible to work with, darn it. I started making … Continue reading →

I’ve been playing a bit further with the visual demonstrations of the binomial/ central limit theorems. I love polymer clay as a medium, it’s extremely easy to work with, colourful, and you can even make fractal patterns with it. Here’s … Continue reading →

I’ve been playing around with Galton Boards recently. They’re an awesome demonstration of the central limit theorem, and how several independent 50/50 events sum together to make a Gaussian/Bell curve. Seeing the standard Galton board gives an intuitive feel for … Continue reading →

I’m working on a project that involves lots of different coloured cords, and I wanted a way to avoid tangles while transporting & working with them. Files here: https://www.thingiverse.com/thing:2360450  

I’m a big fan of Bayesian statistics, and also old analog computers. It occured to me one day that I hadn’t ever seen a slide rule for calculating Bayes’ theorem… Here’s how to use it. Let’s say you’re a doctor, … Continue reading →