Category Archives: Allgemein

Calliope mini 2.0 – Flash Memory for 20 programs

Posted on 27. July 2020 by holadiho

The Calliope mini is a tinkering tool built to help with STEM education in german schools (in the beginning – in the meantime there are user-groups all over the world) – some call it the german microbit, which is not … Continue reading →

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Calliope mini as a maker tool

Posted on 12. January 2017 by holadiho

I am glad to be part of the wonderful team around Calliope mini, the german educational tinkering board that was released in a first version last autumn and will be distributed to first grade school kids soon. Calliope mini is … Continue reading →

Posted in Allgemein | 1 Comment

3D Modeling for 3D Printing

Posted on 29. August 2016 by holadiho

Today i did my first model with OpenScad. It follows a completely different approach than most other 3D modeling enginges – instead of creating objects with the mouse and and a tools palette like it’s done in Sketchup or Blender, … Continue reading →

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Powering Arduino from a Capacitor

Posted on 8. February 2016 by holadiho

Sometimes batteries suck. They are expensive, can be dangerous and tricky to handle. And it takes often too long, to load them again. Think of an experimental board with an Atmel 328 microprocessor (the one that powers Arduino UNO) that … Continue reading →

Posted in Allgemein, educational, Wearables | 1 Comment

Crappy Arduino M0+ Pro

Posted on 17. November 2015 by holadiho

Recently Arduino launched a new ARM-based Board, the M0+ Pro. Well, actually it’s Arduino.org, who launched the guy, not the well known team around Arduino.cc… Until know i only read about this weird fight between the Arduino Founders around Massimo … Continue reading →

Posted in Allgemein | 2 Comments

How to flash an Arduino over the Air with Bluetooth

Posted on 22. October 2015 by holadiho

As mentioned in the previous article i wanted to figure out how to connect the Arduino over Bluetooth to my Mac, including flashing the device. I managed to get the serial console over the air with the HM-13 module as … Continue reading →

Posted in Allgemein | 1 Comment

There shall be sensors, Mysensors…

Posted on 31. August 2015 by holadiho

One of the coolest projects i stumpled upon recently is the mysensors project by Henrik Ekblad and his team. The aim of the project is to offer a framework for a network of sensors and actuators in an environment like … Continue reading →

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How to fire an IFTT Event with a custom http request

Posted on 28. June 2015 by holadiho

Recently the guys from IFTT integrated a new way to trigger events – now you can call the platform with so called “Maker Events”, which are basically customizable http/api requests. Find more details here: iftt.com/maker The request looks like this: https://maker.ifttt.com/trigger/plant_thirsty/with/key/[your key] … Continue reading →

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First experience with my new Robomow RC306

Posted on 18. May 2015 by holadiho

I am sitting in my hammock while writing this article – watching my brand new Robomow RC306 cutting the grass in our little garden. I bought the guy a couple of days ago and he is doing his third round … Continue reading →

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Physical effects of a missing index in MysQL

Posted on 27. April 2015 by holadiho

Last night i had one of these nights where you think about throwing the sh*** out of your window – which in this particular case would have been quite impressive as i was working on my lamps that are made out … Continue reading →

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