Author Archives: holadiho

About holadiho

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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 →

Posted in Allgemein | Leave a comment

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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Building a cellular tracker: Part 8 – the Case

Posted on 1. April 2015 by holadiho

As described earlier my cellular tracker did not only have a couple of electrical and software challenges – running autonomously in the wild also would require a safe housing for it, something that can handle rain, high and low temperatures, … Continue reading →

Posted in Arduino | Tagged , | 1 Comment

Finding Europe with Lights – a pan-european Internet of Things installation

Posted on 12. March 2015 by holadiho

One of the reasons why i wanted to have this cellular tracker was a proposal i made to the founders of re:publica – the biggest web- and blogger conference in Berlin, that takes place on May 5th to 7th this … Continue reading →

Posted in Arduino, Maker-Movement, Society | Tagged , , , , | Leave a comment

Building a cellular tracker: Part 7 – Please welcome ArduFona

Posted on 28. February 2015 by holadiho

If you followed the previous posts on this matter, it’s not a surprise that i was thinking of a custom board sooner than later. So here it is – Ardufona: It is a low-power Arduino which runs straight from the … Continue reading →

Posted in Arduino, gsm | Tagged , | 5 Comments

Building a cellular tracker: Part 5 – Which mobile Service Provider to chose for a Worldwide Coverage at low price

Posted on 12. February 2015 by holadiho

As said in the first post of this series – the idea is to create a cellular tracker. Not just because mobile internet makes more sense in the wild – i also believe that IoT Devices will be operated on … Continue reading →

Posted in Allgemein | 1 Comment

Building a cellular tracker: Part 9 – Solar Power

Posted on 12. February 2015 by holadiho

One of the more exciting tasks while building up a cellular tracker is the Solar-Power part. Below i will describe my first results – this article will be updated later on when i am running some more tests and gathered … Continue reading →

Posted in Arduino, electronics | Tagged , , | 2 Comments

Building a cellular tracker: Part3a – Circumventing unreliable Watchdog with external 555 timer

Posted on 24. January 2015 by holadiho

In my current endeavor to build a cellular tracker that can run autonomously for months i stumpled upon a strange problem during outdoor tests which could only be resolved the hard way… Initially i intended to use the built in … Continue reading →

Posted in Arduino, electronics | Tagged | 2 Comments

Basic Electronic tinkering set

Posted on 15. January 2015 by holadiho

The idea was to assemble the cheapest and most straightforward tinkering set for beginners. It’s designed to be used in a huge Workshop at a conference. All parts together (including packaging) cost less than 1 EUR.

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This is why i love the Internet so much…

Posted on 13. January 2015 by holadiho

One of the reasons for this blog is that i wanted to share my learnings with the world, because i learned so much by shared stuff of others, it’s just amazing. Yesterday i asked a really tricky question on the … Continue reading →

Posted in Maker-Movement, Society | 3 Comments