Rye-wheat bread

Another new bread recipe, that I'm right now working on. From the same book as the last experiments, and because of copyright reasons, I won't put the recipe here (Get the book!)

I am very happy that the bread didn't glued too much. In the meantime the kitchen smells amazing, and I can't wait for tomorrow morning to try out this beauty.

For now, good night.

Ginger Sirup

Refreshingly simple recipe with a strong taste. Consider adding fresh peppermint and a lime


  • 200g Ginger
  • 2 Lemons
  • 250g Sugar
  • 750ml Water

Peel and cut the Ginger into stripes. Put the Ginger into the water, add the juice of the lemons and cook for 5 minutes. Still in the hot pan, blend it using a hand blender. Then add the sugar and cook it for another 5 minutes.
Put into bottles. Recommended to use within half of a year.


I just found a new book to work with: "Brotbackbuch Nr. 1" from Lutz Geißler (in German) and love it from the beginning. Every recipe is listed with the effective and absolute time it needs, and apart from the recipies it also incorporates a lot of background informations and craftsmanship knowledge. I came to this book via the (also German) podcast Chaosradio Express, or more specifically, episode 213 - "Brot".

But enough waffle.

My latest creation is the most basic recipe from the book: The "Landbrot"

The recipe is very basic but because I cannot find it publicly at brotbackbuch.de I have to assume it's under copyright. Still some notes about making this bread

  • Plan it well ahead, on the baking day you will need up to 4 hours. Don't start at 8, otherwise you will bring your bread out of the oven at 12. Accelerating bread is not possible or at least not recommendable.
  • I didn't spend the recommended 1 and half hours of the "Stückgare". The result is still a very good bread, but could be a bit more fluffy. Again: don't try to haste bread. That will not work
  • The result is amazing. Very easy to make bread with potential for everyday usage. But I'm still at the beginning
  • I ate a full quarter of it in one morning. It was really good!

Sourdough bread

Another weekend, another bread.

This time I was trying myself on a very simple sourdough recipe, for a tasty bread without any yeast

The recipe is really simple, and split into two parts: The sourdough and the actual bread:


100g flour, 100g water, 10g sourdough starter

I fed an took care of the sourdough started for about 4 days, until it was active enough to get to the bread. Then take out 10g and mix all ingredients together. Let them stand for about 12-16h at 25 degree.


Sourdough, 400g flour, 200g water, 10g salt

Mix together, and let stand for about 30 Minutes. Then knead it by hand for some minutes. Let stand for about 6 hours at at 25 degrees.

Bake at 200 degrees for about 40 minutes.

The result. The form is not so round because it was to gluey for the bread form, resulting in half of the bread sticking there and consecutively ending up in the sink 🙁

Initially I declared the other half on the baking tray as failure, but because the oven was hot and I wanted to try the taste I was anyways going to bake it. Turns out, that the bread was kind-of self-healing. Lesson learned: Bread can excuse small (and big) mistakes pretty well. At least this one 🙂

The inner part of the bread has very nice pores and tastes fluffy. Pretty much impressive for a bread without any baker's yeast! Nature gives you all you need, you only have to know how to use it. And it takes it's time. You can't hurry a good bread.

Taste-wise I am a bit disappointment. The bread has many aroma, especially in the crust, but the interior is a bit too sour. The reason is probably, that the sourdough started had too many sour-bacteria and too less yeast cultures, but something that I can make better the next time by selectively feeding the yeasts before starting the sourdough (so called "Hefeführung"). And let the bread-dough stand for not so long, not even to peak height.

Well, it was a try, and for now I am happy with the result. Especially after I wanted already to declare it failed after half of the dough sticking to the bread basket.

And for now: Happy baking!

Playing around with Infragram

[Quicklink to my tool on GitHub]

Yesterday I started to work on my Infragram camera that I bought some years ago from Adafruit. I never got it really running and at some point I just put it away. Until yesterday.

Infragram by Public Labs is a citizen science project that allows you to visualize plant health. It is based on a multi-spectral satellite imaging technique from NASA - the NDVI analysis.
In simple words: It takes the near infrared and the visible light spectrum and runs some (pretty simple) math on them. We come to that in a second.

Although infragram.org provides a online analysis tool, I found that pretty much unsatisfactory. At the end of the day I want to run those things on my own devices. Since I couldn't find useful tools, at some point I decided to write my own.
Luckily there is enough documentation on the Infragram Wiki, that I was able to do that.

Let's start with the basics.

NDVI analysis

The informations of this section are based on the NDVI wiki page on Public Lab. NDVI stands for "Normalized Difference Vegetation Index" and is a technique that monitors how much photosynthesis is happening [5].

See the example picture, taken from [6]


In a nutshell: NDVI is a technique to monitor the photosynthesis by differentiating between infrared and visible light pictures. The math behind it is pretty simple

The output is a value between -1 and 1, where higher values indicate high photosynthesis happening.
Of course, this is only valid for light being reflected by plants, reflective surfaces like lakes or the sky do not match the assumption.
The following picture shows a example output of the NDVI technique

Example picture of the NDVI technique [https://publiclab.org/wiki/ndvi]

Infragram Tool

Since I couldn't find any native tool that directly supports Infragram on Linux, I decided to write my own tool. The aim was a easy-to-use zero-knowledge tool to just start. At the end of the day all I want to do, is to connect the Infragram camera to my laptop/raspberry pi/NanoPi Neo or whatever and take NDVI pictures. So I designed it to work in the following way


I wrote the tool and played a little bit around with it

First picture in daylight. Left: Camera, Right: NDVI

In the daylight, the camera is wayyyy to oversaturated. The resulting picture is not really meaningful. So let's take the plant indoors, where it still gets indirect sunlight.

Left: Camera, Right: ndvi

Ok, looks already pretty good! The chosen colormap is not really good, that's something I have to work on. Now, let's see if the output is actually reflecting how good the plant is in health. I put a piece of paper in front of the plant to cover the IR emitted light.

I'm covering the observed plant with a piece of paper to have a look at the NDVI technique. The paper should be clearly visible as non-healthy part of the plant.

So, how does it look in the end?

Plant with piece of paper to cover IR light. Left: Camera, Right: NDVI

Ok, I can see the piece of paper but on the places where the leaves are pretty close the IR emission seems to penetrate. This is actually a good sign, because it reflects the nature of the IR emission. Next, I want to try how it looks if I thicken the paper

With the folded paper as emission blocker, let's have a look at the picture of the Infragram camera

Two pieces of paper, folded two times in front of the plant. Left: Camera, Right: NDVI

Hmm, I still can see the paper, but the expected behaviour (sharpt edges and cut-out paper) did not happen. Maybe the paper itself is a good in IR emission of the scattered ambient light. I don't know for sure, but yet, the results are OK for the first tries.

I now have a working prototype that runs on my Laptop and can start to further dig deeper into the topic. At least that's something very nice! 🙂

Further work

The provided tool is a working prototype, but the colormap and the NDVI technique are not yet fully utilized. As of now, this might be a good starting point for some other people, but the software is not yet as mature as it can be used for anything but playing around.


Bread baking - Level up!

My bread baking skill is leveling up Today I took the day off, so I had some time to finally work on my baking skills. And here's what came out of it.

Sourdough based, mixed rye-splen bread, with over-night rise and lots of love 🙂

Yes, I was playing with some filters for the pictures. Totally not visible.

Modified recipe from the book "Slow dought real bread" from Chris Young.

Rotterdam: Poffertjessalon Seth



Poffertjes are small pancakes and a Dutch speciality. Traditionally serverd with a piece of butter on top and covered in sugar. They are filling enough to count as a full meal.

If you are around the market place, then you should probably step by the Poffertjessalon Seth. It's located in Hoogstraat 177 and serves delicious little Dutch pancakes.

You can even watch the bakery man make them.

Poffertjes about to be served

A must-go if you are around the market place!

i3 Garden

Yesterday while doing a small walk I passed by a garden with something interesting in it

i3 Garden example in real life (Seen in Sieglander)

It's an Innsbruck Corporation called i3-Garden, that offers those fancy boxes where you can grow your stuff.

I like the concept and it may be of use for someone who wants to grows stuff on the Balcony or on places, where the access to soil is limited. They also offer products for indoor growing.

I don't want to promote this product, I don't own it, but I like the idea and find it worth spreading. This is a "nice thing I once saw and appears to be useful for some people" and not a "this is a must-have for the upcoming Zombie-apocalypse in order to grow your food that you don't starve"-post 😉

Chocolate tastes better from an orange cup

News of the day: Hot chocolate out of an orange cream cup tastes better

Picture stolen from www.gizmodo.com

According to an article of 2013 based on an empirical study on 57 participants, it tastes best if it comes out of an orange cup. White cups were the worst.

Also, cream cups are making chocolate slighlty sweeter with a bit of a better aroma.

The colour of the recipient where you serve food and drinks can enhance some of its attributes, like flavour and aroma. There's no fix rule to tell which colour enhances what food. This varies depending on the type of food but the truth is that the effect is there. Companies should pay more attention to the recipient because it has a a lot more potential than what you imagine.

Well, you can decide for yourself what is the take home message of this article 🙂 If unsure, I suggest a field study en detail with the delicious Dutch Bensdorp chocolate.

Impro-Waffeln nach Felix' Art

Sonntag, 16:00 Uhr in Namibia. Der Kaffee steht dampfend am Tisch, die Aussicht ist herrlich.
Und es ist kein Kuchen da, um gegessen zu werden.

Waffels - "Use what you have left"-Style!

Time to make delicious waffels.
Nur eben nicht nach altbewährtem Rezept, sondern mit den Zutaten, die noch da sind. Im Zweifelsfalle, improvisiere was das Zeug hält!


  • 250g Mehl (Weißmehl gemischt mit irgendwas komischem, wo schon Backpulver drinnen ist)
  • 100g Butter (8 g Butter und der Rest irgend ein gesalzenes Butter-Ersatz-Zeugs, das noch da war)
  • 50g Jogurt (wir hatten keine Sahne mehr)
  • 125g Zucker
  • 4 Eier
  • 2 Päckchen Vanillezucker (die ich eigentlich für Buchteln oder sowas gekauft hatte)
  • etwa 200ml Milch (aus einer komischen grünen Packung)
  • 1 Prise Salz (Iodiert mit eine Haltbarkeit von 2 Jahren)

Durchführung nach Felix' Art

Eier trennen, und das Eiweiß steif schlagen. Dazu zunächst einen Rührer nehmen, herausfinden, dass das Teil nur Knetaufsätze hat, den Rührer verfluchen, und dann den zweiten Mixer verwenden, der auch "normale Aufsätze" hat.
Die emotionale Komponente nach der Wahl der Mixer ist dabei essentiell, denn diese bestimmt auch die Geschwindigkeit, mit der der Teig gerührt wird. Wichtig!

Noch etwas grantig, werden nun alle Zutaten mit unnötig hohem Elan in eine Schüssel gemischt und dort unter Einsatz diverser Drohgesten verrührt. Der Teig muss immerhin spüren, wer hier der Chef ist. Klare Fronten schaffen, von Anfang an!

Nachdem nun alles verrührt ist, mischt man noch das beinahe vergessene Salz bei. Dabei ist es unerlässlich, dass mindestens genauso viel Salz neben der Schüssel, wie in der Schüssel landet. Das baut eine Sicherheitszone gegen Ameisen und anderes Ungeziefer, wie z.B. naschende Mitarbeiter auf.

Nun wird ein Waffeleisen herangeschafft. Da es ein mir neues Gerät ist, und keine Bedienungsanleitung da ist (die auch wahrscheinlich niemand gelesen hätte) werden die ersten Waffeln erstmal so richtig versaut. Also so richtig! Am Besten gelingt das damit, dass man die Temperatur ganz nach unten dreht, und die Waffeln so überproportional lange im Waffeleisen lässt. Die dadurch entstehende Verkrustung und irreversible Verbindung von Teig und Waffeleisen schaffen zusätzlichen Respekt beim verbleibenden Teig und die künftigen Waffeln werden es nicht wagen, nochmals zu verkleben. Zumindest nicht nachdem sie gesehen haben, wie die erste Ration grausamst aus dem Eisen gekratzt wurde, und nur Stücke von der Größe < 1cm übrig blieben. Hier gilt die Einschüchterungstaktik! Weiteren Waffeln dürfen gar nicht mehr erst dran denken zu verkleben.

Die entstandenen Waffeln werden nun in Reih' und Glied am Tisch ausgelegt. Wer aus der Reihe tanzt, wird sofort und ohne Umwege verputzt. Selbiges gilt auch für besonders schmackhafte Exemplare. Der verbleibende Rest an gut ausgebildeten Einheitswaffeln wird noch in eine Tupper-Ware einquartiert, und wartet auf den Einsatzbefehl. Der kann dann auch in der Nacht ankommen, als Support für eine angeschlagene Shift-Truppe am Teleskop ("Sugar-Support needed. NOW!")


Waffeln machen nach Rezept ist was für Weicheier. Alles was zählt ist ein entsprechender emotionaler Zustand und den Teig von Anfang an zu zeigen, wer hier der Chef ist. Manchmal bist du der Rüher, und manchmal bist du eben das Ei. So ist das.



Die Waffeln haben übrigens sehr gut geschmeckt - Und nehmt nicht alles was da oben steht zu ernst 😉