Wednesday, July 22, 2009
How to Make an Arc Light
Arc lights are extremely bright. Not particularly efficient mind you, but they are certainly bright. When I was going to high school in the 70s, there were arc light movie projectors in the school auditorium.
WWII style searchlights were arc lights as well. Each search light piercing the night sky over London searching for Stukas and Junker bombers were the equivalent of a 13,000 watt incandescent bulb and were able to throw a beam on something five miles away.
Click above on the picture above or browse to http://www.youtube.com/watch?v=wY06G2iSR8M for a video of an arc light I made that uses carbon rods from a non alkaline battery and a 12 volt transformer. The video shows how it's made and more info is available in an upcoming issue of Make Magazine.
Note: If you make one, don't look directly at the arc without eye protection -- avoid the UV rays