Sonntag, 26. April 2015

Star lamp

I found an old box full of brass stars in the trash. Found out, super glue really works well with them...

Thanks to LeaderBrat for the nice, antique stand.

Montag, 20. April 2015

Wooden staircase.

If that seems familiar, then have a look at the last post on this blog. ;-)

We got the laser cutter in the Munich Maker Lab to work and I tried large scale engraving for the first time.

Its MDF, about 45x30cm and took 80 minutes to engrave and cut.

Samstag, 10. Januar 2015

Triplet ceiling lamp

A lamp made out of three Hella fog lamps ('Hella 1NL 008 090-821' to be exact).

The lamps are mounted upside down and are adjusted to light the ceiling but not the wall. They are nearly parallel to the ground but still only light the upper part. So you can see the exit point of the light but it doesn't dazzle.

The 12V transformator is contained in an Ikea Blanda Blank metal bowl - perfect fit.

A learning: Do not use speaker cable for anything that gets hot! I had this mounted 3 month ago, but the isolation of the speaker cabling melted and shorted. Thankfully I was in the room and could switch it of before everything went to hell.

Downsides: Gets horribly hot, draws just under 300W, really expensive (around 150€ in parts)

Freitag, 2. Januar 2015

My 31c3 watch list

I went to the 31c3 and watched a lot of awesome talks. Here is my list of good stuff (still expanding):


Too Many Cooks - Exploiting the Internet-of-TR-069-Things

SS7: Locate. Track. Manipulate

Mobile self-defense

Gefahren von Kameras für (biometrische) Authentifizierungsverfahren

Vor Windows 8 wird gewarnt

The Perl Jam: Exploiting a 20 Year-old Vulnerability


NSA: Tell no-one

Inside Field Station Berlin Teufelsberg


What Ever Happened to Nuclear Weapons?

Mit Kunst die Gesellschaft hacken

The Cloud Conspiracy 2008-2014


The Only Thing We Know About Cyberspace Is That Its 640x480

Samstag, 27. Dezember 2014

Up-cycling headphones

I needed new bluetooth headphones as my old Nokias started to fall apart. 

Seeing old analog wireless headphones in the free-for-all bin in the Munich Maker Lab I looked around for a easy solution to enable them with bluetooth. 

I found the OVC3860 module (5$) which integrates an bluetooth module with HiFi and headset profiles, an headphone amp, lipo loader and even has some pins for easily attachable buttons. 

I've put the module in one side and an old 370mAh lipo with an separate charger in the other. 

Features added: 
- 3 buttons on the side to control Play/Pause, Next, Previous
- NFC sticker to setup up the bluetooth connection 
- Audio port usable as a line out (with volume turn low) or speaker in (with audio module off)

Total cost of the project: around 10€

Donnerstag, 25. Dezember 2014

New insights in my mobile

I have a Sony Xperia Z which I was very happy with until recently.

First, an Firmware update destroyed the battery runtime, then another one fixed this, but the phone was laggy as hell THEN the lens permanently fogged up from the inside with dust (this phone is waterproof, how did that happen??).

I was close to buy the new MotoX, but decided to follow the Self-Repair Manifesto and 'own' this phone. First I installed Cyanogen Mod to make it fast and stable again, then I fixed the lens fogging. I had concerns about that as everything is glued together but it was really easy. You only need a hot air gun and a suction cup.

Anyway, I tried how easy it is to remove the black coating of the back glass... you see the result below. =)

The mainboard was covered by the NFC antenna, so I moved that over the battery.

Sonntag, 9. November 2014

I'm in a wall....

... unbelievable!

Sorry for the lack of posts, lots to do (like this). But two projects are done and I hope I can put them up soon.

Mittwoch, 27. August 2014

Light bowls

The small central corridor of our flat is lit by an old IKEA cable track light with three spots. We got it with the flat and I kinda liked it, but as I stumbled upon shiny white bowls with inner golden coating its day were numbered.

Goodbye, boring lights.
I used the cable track and the original mounts to attach the bowl, which in turn got an 1157 car light socket installed. I wanted to install LED lights and therefore put an rectifier on top to convert the AC from the IKEA transformator to (100Hz pulsed) DC. I used rectifiers about 50x to big which enabled me to use the AC input wires as mounting points (~1mm thick) to hang the lamp from.

One LED is already dead...
The cheap 'warm' LED lights I bought produce a strange ghostly light. Not perfect. And the 100Hz kinda show, maybe I will put some caps on there.

But they look nice in the corridor, I will try to get other lamps to improve the light temperature.