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Raspberry Pi B+ Pinout Leaf


I'm currently working on a little project involving a Raspberry Pi and some stuff connected to it's General Purpose IOs.

Looking up the pinout scheme every time again gets tiring fast. A good solution is the Raspberry Leaf - a simple sheet of paper that slips over the pins and labels them. Unfortunately I couldn't find one that:

  1. shows all 40 pins of a Raspberry Pi B+
  2. shows the WiringPi numbering scheme

So I set down and made one in Inkscape. The result can be found in this Github Repository.

rpi, diy, electronics
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Last updated: 2015/03/29 10:43 · Permalink · Comments

Games I liked in 2014

It's 2015 for a while now. Time to look back on the last year. I played quite a few (computer) games, so why not have a list of my favorites.

Please note, that they are listed here in no particular order. They are all available on steam. Oh and I realize that not all of them came out in 2014. But I played them in 2014 - that's what counts.

Last updated: 2015/01/16 12:45 · Permalink · Comments

Agenda Watch Face for Android Wear

Of course the first thing I had to do to my new watch is customize it. Over the weekend I learned how to build my own watch face in WatchMaker1). The result is shown here:

Most of the information is only shown in active mode (pictured left). I went for a white background because I assume it will be much better to read in outside. Thanks to the ugly Berlin Winter weather I had no way to test that hypothesis though ;-). Dimmed mode (pictured right) uses a black background of course and fewer info.

Most important to me besides the current time are my upcoming agenda items. The watch face shows them in two ways. One is a simple list of the next three appointments. The other is a representation of their length on the border of the watch.

Getting these border graphs right was the hardest part. Since appointments happen on a 24 hour day, but the circle only represents 12 hours, I had to come up with some logic to decide when there's space for the next afternoon appointment even though it's still before twelve. Took a while, but now seems to work just fine2).

Another problem I encountered in dimmed mode. I wanted to have the border graphs in dimmed mode, too. It worked just fine in Watchmaker, but once on the actual device I noticed the watch being off-center and cutting pixels. A reddit post later I found the reason: an Anti-Burn Screensaver mechanism in Android Wear.

The watch face compensates for that behavior by moving the graphs a few pixels towards the center when the display is dimmed.

The watch face is available for download from FaceRepo.

smartwatch, watchmaker, watchface, android, wear
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1) Good info is linked from this reddit post
2) thanks Theresa, for helping me with the math :-)
Last updated: 2015/01/12 19:35 · Permalink · Comments

New Gadget: LG Watch R

As you may know I'm eyeing the smart watch market for some time now and I finally decided to buy one.

My LG Watch R arrived yesterday, so there isn't that much insight to share. But I'll do it anyway ;-)

Last updated: 2015/01/09 16:00 · Permalink · Comments

One Year of Car-Sharing

Since I got my drivers license I try to drive as much as possible for training and fun. Even though I found it very hard to learn, I really enjoy driving now. Even in Berlin's traffic.

Of course I don't own a car. It's not really worth the hassle and Berlin's public transport mostly works. But since 2013 I'm member with 3 different car sharing companies.

All three are “free-floating”. That means you find the car via a mobile app, unlock it with your membership card and leave it wherever you want. There are no fixed stations. Of course the “wherever” is limited by their business area which unfortunately does not cover the whole of Berlin. For example my mum just lives slightly outside the area.

Last updated: 2015/01/06 20:25 · Permalink · Comments

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