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Jeri’s at it again, this time, cracking open some 1N34 diodes to harvest the germanium to build a crude transistor. Before that, she does a really nice job sketching out the basic physics behind semi-conductor operation. And she does get her point-contact transistor to work. Crude, but it works! Kudos, as always, Jeri!

Make a Point Contact Transistor at Home

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Lost Knowledge: Homemade electronic components

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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