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In this Boing Boing Video, PopSci columnist and author of the splendid and high-recommend Theo Gray’s Mad Science, explains how electrochemical machining (ECM) works and shows off a rig he put together to do ECM in his shop.

The entire how-to can be found at

Carve Steel with Saltwater, Electricity and a Tin Earring (Popsci)

Theo Gray on why “safety” is overrated
Behold: the flaming bacon lance of death!

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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