Mirror light with capacitive touch control

This time, a relatively simple but nice looking project: a mirror light, of which the brightness can be controlled by capacitive touch control. Although the project maybe is a bit less challenging than others, I’m trying to document some more of my projects. The idea is quite simple: add some LED strips next to a… Read More »

High speed balancing robot: introduction

This entry is part 1 of 1 in the series Balancing robot

For quite some time, I’ve been developing a two wheeled balancing robot. You know, like a Segway. But in this case it is somewhat smaller, as to minimise damage when hitting something at high speed. That happens rather often, due to the very high maximum speed of this robot. This post will cover the architecture… Read More »

Magnetic table lamp: the making of

Making a present can be quite complicated. Mostly it’s not the making that is hard; getting the idea is the crucial step. Once the idea is in, the rest follows (although it can still cost a lot of time). So, after months of tinkering and thinking, no idea that was good enough came across my… Read More »

3D printed siren

A short post on a project from a while ago. It’s about a 3D printed “air raid” siren, which uses a brushless motor from an old 3.5 inch hard disk drive. Some people requested the source files, which are included in this post. The trick in making a lot of noise is to have a… Read More »

Eddy current ring launcher: practice 1

This entry is part 2 of 2 in the series Eddy current ring launcher

Time for a little experimentation with high voltages. To see how well the concept of launching a ring using Eddy currents works, I wanted to do a more serious test. Just to get some feeling for its behaviour, since theory alone is a bit boring. Thus, with this first prototype, no optimisations or whatsoever are… Read More »

Eddy current ring launcher: theory 1

This entry is part 1 of 2 in the series Eddy current ring launcher

The goal of this experiment is to understand, and build an eddy current ring launcher. This video shows shows some aluminium can destruction and the launching of an aluminium ring using eddy currents. Besides that it looks cool, I want to understand the underlying process, so that it is also educational in the theoretical sense, instead of “just… Read More »

3D printed vase with wood filament

The 3D printer needs to be kept active so now and then. This post describes some experiments with printing spiral vases, using filament with wood fibres. Printing spiral vases isn’t new, but the result of this print is quite nice. The object to print is one of the Julia vases by  Virtox, the Stratus version to… Read More »

Wake-up light, part 2: patterns

This entry is part 2 of 2 in the series Wake-up light

A short update for the wake-up light. Some quick (and dirty?) coding using an Arduino Pro Micro and the Fastled library already gives some nice results: The code uses the Fastled built-in HSV colorspace (hue, saturation, value). Although originally meant for RGB LEDs, it also seems to work fine for WWA (warm white, cold white,… Read More »

Wake-up light, part 1: casing

This entry is part 1 of 2 in the series Wake-up light

With these long nights, waking up can sometimes be challenging. Therefore, I wanted to make a wake-up light. Buying one is also one of the possibilities, but making one yourself is much more fun. You can also add some unique features. The idea is to not just have one light, but to use an LED… Read More »

Buck converter, dead bug style

For today’s experiment, the goal was to make a simple buck converter, based on an XL4005 I had lying around. Since I don’t have experience with building an actual switching voltage regulator, this is a nice and educational experiment. The circuit is basically the application example of the XL4005 datasheet: Operating frequency is about 300 kHz… Read More »