DIY IKEA Wireless Qi Charging for the Hexiwear


The Achilles Heel of the Mikroelektronika Hexiwear is its charging: the charging and USB connector are only designed for a limited number of plug-unplug cycles, and it does not have a wireless charging capability like the Apple iWatch. Until now! I have built a DIY wireless charging system for the Hexiwear 🙂 :

Wireless Qi Charging the Hexiwear

Wireless Qi Charging the Hexiwear

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Prototype of tiny Hexiwear Docking Station


For a research project we are using Hexiwear to measure the effectiveness of teaching and learning. The Hexiwear is used as a networking sensor device in that project. For that project we needed a docking station with wireless capabilities:

Mini Docking Station for Hexiwear

Mini Docking Station for Hexiwear

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Making-Of Sea Shell Sand Clock


The year is coming to an end, the Holiday season is approaching. In case you are looking for a nice present: I have completed my version of a sand clock: a clock writing the time into sand:

Sandclock

Sandclock

If you are interested to build your own version, I have documented the different steps with tips and tricks…

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Failure with Solder Points and Mechanical Pressure


The good thing with failure is: it is an opportunity to learn :-).

So here is a case: For a STEM roadshow (see “MINTomat: World’s Most Complicated Bubble Gum Automata?“), we have produced in a rush an autonomous robot with a shiny printed 3D cover:

LED effect in blue

Prototyp with LED Effects

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MINTomat: World’s Most Complicated Bubble Gum Automata?


How to fascinate kids for technology? Show them that engineering is fun :-). At the Lucerne University of Applied Sciences and Arts we have created the ‘MINTomat’: a robotics system for STEM activities rewarding interaction with bubble gums:

MINTomat

MINTomat

Yes, pretty over engineered compared to a normal bubble gum automata, but that’s part of the fun :-).

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Avoid Warping ABS on Ultimaker 2


3D printing is like cooking or like BBQ: It is more about barometric pressure, humidity and temperature than you might  think of. To me, printing (and cooking) is a combination of art and science. And as with cooking, sometimes the result is not usable.

I’m very happy with the Ultimaker 2 printing PLA material. For a LED matrix project I have to use ABS as this material is suitable for higher temperature: PLA simply will not stand the heat produced by the LEDs I’m going to use. And here the joy ended: printing using ABS was definitely no fun. While the first small test print came out OK, I produced afterwards a pile of unusable parts because of warping :-(.

Pile of bad ABS Parts

Pile of bad ABS Parts

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3D Printed Gameboy and Remote Controller with tinyK20 Board


As a remote controller for the Sumo robot (see “Zumo Robot with Magnetic Encoders“) we have used so far a combination of NXP FRDM-KL25Z board and a Joystick Shield (see “Joystick Shield with nRF24L01 driving a Zumo Robot“). That solution was not ideal, so this weekend I created a 3D printed prototype:

tinyK20 Remote Controller

tinyK20 Remote Controller

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Kinetis Lava LED Light Cube


In “openHAB RGB LED Light Cube with WS2812B and NXP Kinetis” I started experimenting Kinetis boards, a LED cube diffuser and Adafruit WS2812B NeoPixel LEDs. That worked well, but I was not to very happy about the visual effect. So here is my next version: I wanted to have control over each side of the cube. For this I have built a cube inside the cube with a 3D printed structure:

Bare LED Cube

Bare LED Cube

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The Return of the 3D Printed Flying Toaster!


Does everybody still know why in the ‘old’ days there was the need for running a ‘screen saver’ on the computer? With the modern LCD displays they lost their initial purpose.  After “3D Printed Classic Mac Apple Watch Charging Station” I’m doing more ‘good old days’ 3D printing. The ‘elder ones’ might remember the “After Dark” screen saver software for Apple Macintosh and Microsoft Windows machines. Yes, that was 1991! For me most famous and iconic theme were the “Flying Toasters”:

Flying Toasters

Flying Toasters

Now there is a 3D printed version 🙂

Flying Toaster SD Card Holder

Flying Toaster SD Card Holder

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3D Printed Magical MUFG Capsule to Duplicate NXP Kinetis K20 Boards


Sometimes it is all about doing fun stuff: to carry and store the tinyK20 (NXP/Freescale Kinetis K20) boards needed for next course, I wanted to build something geeky: a MUFG capsule to store and duplicate Kinetis boards 🙂

MUFG Capsule with tinyK20

MUFG Capsule with tinyK20

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3D Printed Classic Mac Apple Watch Charging Station


One of the first machine I used for development many years ago was a Apple Classic Macintosh computer. My days of development with Pascal and Modula-2 are long gone. But with the availability of 3D printers I can print a Classic Mac :-). But now it is not used for development: I use it to charge an Apple Watch:

3D Printed Apple Watch Charging Station

3D Printed Apple Watch Charging Station

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First 3D Printed tinyK20 Board Enclosure


The tinyK20 boards are now used in several projects. Initially I was considering a commercial USB thumb drive enclosure for it. But this needed some tweaking of the enclosure so at the end it was not ideal. 3D printing is probably that hot topic for 2016. So why 3D printing an enclosure for that board?

tinyK20 3D Printed Enclosure

3D Printed Enclosure for the tinyK20 board

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