How to Build a Water Activated Flashlight

http://youtu.be/GSdu1vsSt0M

Published on Sep 15, 2014

Super easy 3D printed NS coil tubes work great for making a water activated flashlight. This is the first concept build. If you do not have a 3D printer, you could use a PVC pipe for the tubes.
Build details, links and 3D file here: http://laserhacker.com/?p=443