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This is one of the most satisfying kits I’ve ever built, and the Sumovore it creates will be eligible for official RoboGames Mini-Sumo competitions, in which robots vie to push each other out of the ring.

This is not a project for beginners, but thanks to clear documentation and well-organized components, anyone with moderate soldering skills and sufficient patience shouldn’t have much trouble. It ships with analog “discrete brain” circuitry, but “brainboard” kits let you add popular microcontrollers.

Gareth Branwyn

Gareth Branwyn is a freelancer 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 for Boing Boing and WINK Books. And he has a new best-of writing collection and “lazy man’s memoir,” called Borg Like Me.


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