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carChargerTin.jpg

This Instructable shows you how to build a lighter-based 12v battery trickle charger made from a laptop power supply, a LM317T regulator, and an Altoids tin (and some other misc components).

Car Battery Charger from Spare Parts in Mint Tin

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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