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In this brief video, MAKE contributing editor Bill Gurstelle demonstrates a simple arc light (a precursor to the incandescent bulb) using a length of carbon rod, a knife switch, some ceramic insulators, Nichrome wire, and an 18-volt power tool battery.

How to Make an Arc Light

Gareth Branwyn

Gareth Branwyn is a freelancer writer and the former Editorial Director of Maker Media. He is the author or editor of a dozen books on technology, DIY, and geek culture, including the first book about the web (Mosaic Quick Tour) and the Absolute Beginner’s Guide to Building Robots. He is currently working on a best-of collection of his writing, called Borg Like Me.


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