Christmas is coming. The pre-christmas season has started. Sweets everywhere. It doesn't matter, if it's classic chocolate, marzipan potatoes, baked goods or gingerbread: Everything, everywhere! Everything is within easy reach, waiting to be eagerly devoured.
Every year i swear myself, to not eat this much. But every time i lose. Every time I lie on the couch, nearly sick, swearing to do better next year. Not this time. This year i will build some prevention:
A crate, which I have to open with a RFID Token, just three times a day. Haha! Take this! Future me!

Writing and painting with light. This idea is not a new one:
You just take a camera, switch it to longtime exposure and paint with a flashlight, or LED, some characters in front of it. This works properly, if you are able to draw. I'm not.
So I just stood by admiring those people, but knew I will never be able to do this. Two years ago, while I visited the 30c3 (Chaos Computer Congress), there were some guys from Blinkinlabs. They sold some bags full LED stripes. I bought on e myself anf found out, that you are able to blink own images with it. But unfortunately mine broke after some days of testing. They are not (very) waterproof...

Finally not always using Arduinos:
Every time i nearly finished a project, I'm annoyed about using an arduino again, which uses a lot of space and isn't really necessary. A small stand-alone-controller would totally be enough. While prototyping the Arduino-PCB is a cool thing, but afterwards, when everything is finally assambled, the arduino needs a lot of space, which could be used for other things, like less case.

The idea to build an EMF-Detector came while i fucked up my last project partially. While i was soldering the pcb i did a mistake while connecting a wire. This gave me a broken signal of a buttonstate (switching from 0 to 1) switching back and forth. I fixed that, but wanted to know exactly why this happens.

Result: When you don't connect the input of the controller to ground, you are not able to set a solid state and the µController starts to interpret everything what he gets. In this case it reads electromagnetic fields. So why not digging further into this and build a gauge to have a look on which devices are having a nice electromagnetic party?