A picture a day from my chestnut tree
Right before my window lives a big chestnut tree. As it is springtime now the buds are bursting and everything is growing. I decided to take a picture of one of the buds every morning. These pictures...
View ArticleA picture a day from my chestnut tree part II
To keep the posts readable and loading time comfy I divide the series into parts. This is part two of the pictures from the chestnut tree right before my window. Have a look at what is happening from...
View ArticleBuilding a hot wire foam cutter – mechanics
A hot wire foam cutter is a very useful tool to cut any type of styrofoam boards (expanded or extruded polystyrene) into the shape you want. The goal of this project is to build a low-cost cutter...
View ArticleHow I watched the solar eclipse: low-cost and safe
My experience with the solar eclipse on March 20, 2015 began one day before: A primary school teacher told me that the parents had to sign a form freeing the scool from any responsibility if their...
View ArticleCelebrating the 0th Sunday of Advent!
Everybody knows – and many of us celebrate – the four Sundays of Advent every year. The First Sunday of Advent is often recognized as the beginning of christmas season. And celebrating the Sundays of...
View ArticleCutting grooves into your styrofoam
A hot wire cutter as the one I described here only cuts in a straight line. Now I wanted to integrate some installation tube in my styrofoam. So I had to cut grooves into the foam. Cutting them with a...
View ArticleHeadless raspberry pi – my first steps
This post collects some information and my own experience about setting up a headless raspberry pi – this means there is no keyboard, monitor or mouse connected to the raspi. All the communication to...
View ArticleWarum Greta Thunberg Recht hat
Der Name Greta Thunberg ist derzeit in aller Munde und das ist gut so. Warum sie Recht hat mit ihren Positionen, ihren Forderungen und ihrem Handeln zeigt dieser Artikel. Greta Thunbergs zentrale...
View ArticleModbus RTU Raspberry Pi Arduino and all that stuff
This series of posts is a collection of my experience around connecting a Raspberry Pi and an Arduino through Modbus RTU via a RS485 serial connection. A lot of information can be found online – but...
View ArticleModbus RTU Raspberry Pi Arduino and all that stuff part II
In part 1 we have looked at the Raspberry Pi side of Modbus communication. Now it’s time for some facts about Modbus itself and the other end of the bus which happens to be an Arduino (sort of)....
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