This is a website for my hobby projects, usually involving electronics. Feel free to contact me or leave a comment if you like them.
Project from 7.6.2014 to 13.6.2014.
Eager to try out the CNC mill, I decided to make a pantograph as a present to my nephew. Pantograph is a device that uses four linked arms to constrain the movement of two pens. When one pen is traced over a shape, the other pen draws the same shape enlarged or miniaturized.
Project from 28.2.2014 to 23.5.2014.
Shapeways nowadays offers 3D printing in sterling silver in quite competitive prices. A custom piece of jewellery will cost 50-100 EUR, not really more than what a similar product would in a store. Of course, there is both the benefit and the effort of having to design the model first, if you really want it to be unique..
Project started on 25.2.2014.
Having been a happy Dremel owner for more than a decade already, I am well aware of the joy in finding all kinds of objects hidden inside slabs of wood and plastic. Only problem is that it's somewhat imprecise to cut them out of their solid prison when operating the tool just by hand. To that end, I decided to buy a CNC mill.
Project from 14.10.2013 to 18.11.2013.
My parents live in the countryside, so they often let their dogs run free in the yard. The dark winter evenings tend to make the dogs quite invisible, which is both annoying when trying to call them back inside, and dangerous if they should roam towards the road. This is a light that can remain attached to the collar and turns on automatically when needed.
Project from 4.9.2013 to 30.9.2013.
Winter is coming again, and it tends to ruin my sleeping habits. I have previously used a store-bought wakeup light, but it has a bunch of problems, such as annoying alarm sound that cannot be turned off. For the new appartment, I made a much better wakeup light by changing the controller on some cheap RGB led strips bought from eBay.
Project from 23.3.2013 to 25.9.2013.
E-ink displays, such as the ED060SC4-V2, are easily available off eBay. They are sold as spare parts for e-book readers, but there is nothing to stop you from using them in your own hobby projects. Or is there?
Project from 14.9.2013 to 21.9.2013.
A lot of things I make tend to involve carving large holes with Dremel. With proper cutting bits, it is a fast way to make custom enclosures for all kinds of projects. However, it does generate an awful lot of chips and dust. For years now, I have had small walls made of fiberboard around it to contain the dust; now I decided to make it a bit more presentable.
Project from 29.6.2013 to 18.7.2013.
This idea came from a three-phase brushless DC motor that I had disassembled from a broken hard drive. Having made enough persistence-of-vision displays for a lifetime, I needed some other use for the motor. Ergo, a spinning platform for taking 360° photos of things.
Project from 16.3.2013 to 16.3.2013.
Homemade juices tend to accumulate some dregs at the bottom of the bottle. When pouring out the juice, one always hopes that the sediment wouldn't follow.. but as air bubbles through the neck of the bottle, it stirs the liquid and lifts the solids from the bottom. My mother wished for a pipe that would let the air flow freely to avoid this.
Project from 18.11.2012 to 8.12.2012.
Inspired by the ceramic materials on Shapeways, I really wanted to make something with them. Actual ideas were more difficult to come up with, though.
Project from 9.4.2012 to 3.10.2012.
This is a remote controlled sphere, not unlike the sphero and several DIY variants. It served as a great opportunity to test out inertial sensors & RF control, as well as being a birthday present for my nephew.
Project from 2.7.2012 to 3.8.2012.
My summer job this year involved the selection of 3D coordinates by mouse from a stereo image pair. To demonstrate the results, I built a cheap robot that picks up the selected object.
Project from 27.4.2012 to 4.5.2012.
For our Demola project, we needed a tree with flowers that open by electronic control. The purpose was just to illustrate the concept of a physical tree that would react to energy saving and other good deeds.
Project from 5.1.2011 to 1.12.2011.
This was an attempt to build a remotely operated robot boat. It was planned to have a STM32 processor, GPRS link, GPS and solar panels, in a body about 50 cm long.
Project started on 24.10.2011.
Project from 18.7.2011 to 18.7.2011.
Our thermometer broke. Surprisingly, they still contain liquid metal even though it is not toxic mercury anymore. I forgot about the whole incident, until I spotted a little drop of the metal clung to the back of a chair.
Project from 1.9.2010 to 12.4.2011.
I did my civil service at a local museum. As a side project, I was assigned to "create something that demonstrates how mechanical power transfer works" for the steam engine room. This is what I came up with.
Project from 22.12.2010 to 22.12.2010.
Add a little bit of obscurity to your self-made christmas present. A fake Chinese setup guide sheet might have your friend confused for a moment, not knowing if the present actually is self-made or just of really crappy (or excellent!) Chinese quality.
Project from 18.11.2010 to 20.12.2010.
This is a technical gift to my nephew: plywood planetary gears. I had the opportunity to order some water jet cut parts for a work project, and after seeing the results I tried it in a hobby project also.
Project from 27.11.2010 to 28.11.2010.
My new Nokia 2710 has a radio. However, the sound is way too loud, even with the headphones that came with the phone. It's also not the only device with this problem: often the volume control doesn't go low enough so that you can listen comfortably in a silent room.
Project from 25.9.2010 to 26.9.2010.
Small juiceboxes have one flaw: squeeze too hard and the juice shoots out. That very much annoys my sister (and does not annoy my 2-year-old nephew nearly as much), but my father thought about a simple solution: plastic box that is strong enough to stand a firm grip.
Project from 24.9.2010 to 25.9.2010.
I recently bought a GPS-receiver, Garmin eTrex Legend HCx, mostly for bicycle trips and for improving OpenStreetMap. However, from what I've heard, Garmin's own bike mounts are not only expensive but also weak. Therefore I decided to make my own.
Project from 7.8.2010 to 8.8.2010.
While fixing my laptop, I needed to probe several pins on a surface mounted chip while the system was running. Obviously I didn't want to short-circuit anything by accident.
Project from 28.6.2010 to 12.7.2010.
My workplace had a Brother label printer with broken keyboard. This isn't an ordinary consumer model; instead, it prints on 30 mm high tape and costs several hundred EUR. Therefore it was actually worth fixing, unlike some cheaper models.
Project from 27.4.2010 to 13.6.2010.
A robotic car may be a bit advanced for a two-year-old, but it is what I did anyway. This car can drive forward and backward, steer and detect obstacles and has working lights.
Project from 23.10.2009 to 14.2.2010.
These tiny figures are carved from 4 mm brass, the same material I used in the toy car. The tools required are just Dremel (or any other miniature drill and bits), an utility knife, some files, and a hacksaw.
Project from 29.11.2009 to 19.12.2009.
This cube is supposed to be cute. When shaken, it randomly displays one of four pictures, which are carved on pieces of polycarbonate.