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The Dial-a-Speed is a DIY, one-size-fits-most speed controller. Read more »

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FM transmitters can be complicated to build, but not this one — it's about the easiest you can possibly make. And though the science of radio is well understood, there's a magical, emotional quality about it that we don't often stop to appreciate. Building your own radio receiver — or... Read more »

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From the pages of MAKE's Ultimate Guide to 3D Printing 2014: Amazing 3D printed objects and art! Read more »

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Taking your pulse is as simple as holding a finger to your neck or wrist and timing the beats with your watch. But if you want to record the data or use it to trigger events, you need to turn that mechanical pulsing action into an electrical signal. This sensor... Read more »

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While the user's away, the malware will play. Keep your computer out of online mischief, when you're not using it, by building this simple, foolproof, easy-bake hardware kill switch. Read more »

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Adapt a retro-style headlight generator to charge your cell phone with this simple circuit. Read more »

ShapeLock Sanding Blocks

Inspired by the Sandables concept that recently made the rounds, we've been experimenting with adding abrasive grit to polycaprolactone (aka ShapeLock) thermoplastic to make rigid sanding blocks that can be reformed, with mild heating, to fit into hard-to-reach nooks and crannies on your work. Read more »