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This was a pretty good value set of Allen keys (I need both metric and imperial)

" eyes are primed to detect enclosures; so much so that they can find them even if they are only mildly delineated in a 2D environment"

They managed to see that shockwave going around the world in the infra-red

Walked a bit further on the path under the pylons, along the side of a golf course

The USB battery pack powers an Arduino, which powers a laser

Seems that not only are some prices increasing, but products are in flux in weird ways, meaning I should compare multiple vendors more often...

Okay there's something really cool I've just learned. If you are continuously recording air pressure e.g. as part of your home automation setup or a weather station then you should really check the data of the last 24h.
You should be able to spot the pressure wave from the volcanic explosion in Tonga earlier today.

It reached my setup in Kaiserslautern at about 20:30.

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