Too often is the normal Swiss Knife confused for the Army knife, let's clear this misleading information up. Here I show you the true new Swiss Army Knife (the new 2009 version! used nowadays!).
You can get it on amazon and on ebay for about 40$
It's the first Wednesday of February and that means one thing: It's general emergency sirens test in Switzerland!
This year I almost forgot about it and I was sleeping when they went off the first time. That plus the fact that it was snowing and the weather was kinda crappy led me to only record the sound of it.
That said, the sirens you hear are called APEX 4. Enjoy!
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https://www.youtube.com/watch?v=PV6sZDfGyzw
This is a short video of my awesome Blue 445 nm laser build.
It is capable of 3W of power, however I like to play with a lower power due to the huge danger you're put into when turning this light-saber on.
This time, given that the 3 AA cells were a bit weak and old, I estimate a rough 1.5W as output (maybe less) but still enough to get a great beam shot with my camera and to lit a match on fire.
Enjoy, and if you also play with lasers -> DONT forget to wear safety goggles to protect your eyes! One reflection and you're blind forever.