How (analog) traffic lights work

Craft & Design

MAKE subscriber Joe Kerman sent us a link to this video about how mechanical controllers for traffic lights work. This is from a Canadian kid’s TV show from the late 80s (I think), called the Acme School of Stuff. I watched a number of other episodes on YouTube and found them pretty engaging and educational. [Thanks, Joe!]

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Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. His free weekly-ish maker tips newsletter can be found at

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