If you own several badges, cards, or tickets and would like to automatically publish the number of unused badges on the web in real-time, there is no off-the-shelf solution. This post describes how to build such an IoT system.
Continue readingCategory: Project
Description of a project I finished or I am working on right now
Drifting in the Flow of Time
The featured image of this blog post has been generated by Stable Diffusion.
What happens if you take a dozen clocks and throw them into the flow of time?
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A Sunset Cache Box
The featured image of this blog post has been generated by Stable Diffusion.
What does it take to build a geocaching box that can only be opened at sunset? A box, a button, an electronic lock, an electronic clock, and a controller that ties everything together.
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Synchronism
The featured image of this blog post is by Steve Buissinne on Pixabay
In 2013, we found the Seattle-Köln Exchange Multicache, which requires cooperation between geocachers from Cologne and Seattle. This led to the idea of a geocache where two people at different locations had to press a button at exactly the same time in order to be able to open their respective cache boxes. And now the idea has become a reality!
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Winter is coming …
The featured image of the blog post is by NettPix from Pixabay
And now, there is more time to sit at your desk and do “nerdy” things, such as soldering and coding.
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Another Piece of the Puzzle
For a recent geocache, which is a tribute to the well-known Tetris game, I wanted people to solve a simple physical puzzle (as shown in the image above). As a reward, they get a code that they can use to open a box. So, what do you have to do to make things work? And how do you make sure that you do not have to change batteries for the next 20 years?
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