[Tim] had a problem with his microwave. The buzzer was exceptionally annoying, and once his hot pockets or pizza rolls were done, the buzzer wouldn’t shut off. A two-kilohertz tone infected his soul. It was the only sound echoing in a Boschian nightmare of reheated frozen food.

Unlike an existential ennui, an annoying buzzer in a microwave is something anyone can fix. [Tim] just took a pair of pliers to the buzzer and ripped it off the PCB. This left him with another problem — how to tell when his food was done. This was solved by putting the Windows XP startup sound in his microwave.

With the buzzer out of the way, [Tim] took an Arduino nano and loaded it up with the Windows XP startup sound. There isn’t much Flash on the Arduino, but it could hold an 18kB sample, enough to play the startup sound at 8kHz. The sound itself is PCM audio and easily stuffed into a sketch.

The Arduino listens for the 2kHz tone generated by the microwave and sends the XP startup sound through a tiny class D amplifier. After mounting a speaker inside the microwave, [Tim] has a ｖｅｒｙ　ｖａｐｏｒｗａｖｅmicrowave.

[via Hackaday.io]

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Atom 1.0: http://letsmakerobots.com/node/31322

My previous Arduino project had a controller that was connected to Atom and powered by my laptop. 

Parts: 

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Hamster tracker is a project that came from a hamster forum, my GF reads. A guy there had put a bike computer on his the hamster wheel to measure the speed.

I thought that I could do that in a bit more complicated way. So I started to figure out, what we needed and the speed would just not do it for me. So I thought that the proper way to it, would be to store all the runs in a database, for later analysis. This would also make it possible to display some info on the internet.

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