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Great Time at US Science & Engineering Festival in Washington DC

We had a fantastic time this weekend at the US Science and Engineering Festival in Washington DC.  Among the highlights of our visit, we sat insanely close to the stage for the Q&A with Mythbusters Jamie Hyneman and Adam Savage.  We also had the pleasure to meet fellow diy Science authors Theo Gray (Mad Science, The Elements,

 
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d.i.y. High-Power, Swappable-Head, UV/IR/Visible LED Flashlight with Intensity Control

I urgently needed a high-intensity UV/IR/visible light source for a work-related industrial inspection project, so this weekend I recruited Abigail to help me build a 10W LED flashlight that features swappable UV/IR/visible heads.  We decided to document the build since this flashlight would fit nicely in a photographer’s kit for light painting, IR illumination, UV

 
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