How to build a Lego 9v wire tester

Описание: This is my 9v wire tester. It is very common to have short / open circuits when making your own wires in the beginning but with practice they will be less common. Still it is a good idea to test your wires before trying to use them, and this makes it super easy, barely an inconvenience!

Thanks to @rogue1874 for the video suggestion!

Filckr album with more pictures of the build
https://flic.kr/s/aHBqjAhicF

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Music: "Sandviken Stradivarius, Starmachine2000" by Wintergatan
These tracks can be downloaded for free at www.wintergatan.net
Free License to use these tracks in your video can be downloaded at www.wintergatan.net