Solid titanium dead drop spike

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Brain Dereu of Hollow Spy Coins has done it again. As if the solid stainless steel version of their original aluminum dead drop spike I recently blogged about weren’t cool enough by itself, the Dereu family is now offering the same product machined in solid freaking titanium. Incredibly, they’re selling it for exactly the same price as the stainless steel version.

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Ultrasonic Arduino tape measure source code

Here’s the source code for the Arduino + PING))) + 7-Segment Shield ultrasonic distance sensor project I build for this video. It is the progenitor of my Arduino Nerf sentry gun code, which I’ll be posting soon. Warning: my code gets the job done, but isn’t elegant.
 

Distance Ping Alarm source

In the Maker Shed

PING))) sensor

7-Segment Shield

VHS generational loss experiment

James over at Cinemassacre undertook to find out how many times you could copy VHS footage before it became completely unwatchable. It’s not exactly a well-controlled experiment: He doesn’t report the equipment he used to do the copying or the kind of tape involved and, somewhat annoyingly, he does not actually report the number of clips he spliced together to make his 3-minute video. Determining at what point the noisy footage is “unwatchable” is also sort of arbitrary. Still, interesting to watch. I personally counted 63 generations before the footage decayed into meaningless audiovisual noise. [Thanks, Billy Baque!]

RGB wallpaper changes with the color of your light

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Italian design studio Carnovsky unveiled this concept wallpaper, overprinted with differently-colored complimentary patterns that can be selectively displayed by shining red, green, or blue light on the surface, at Milan Design Week. I think they should add a special super-secret UV-reactive layer, too. [Thanks, Billy Baque!]

Physical sciences and mechanics month

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The June theme for Make: Online is “Physical Science and Mechanics.” Physical science is a broadly used term that can be applied to the study of any non-living systems and how they interact, from the foundational physical laws of energy, matter, and force to the basic principles of simple machines (lever, pulley, inclined plane, wedge, screw, gear). The term is also applied to chemistry and Earth sciences, and from there, it becomes leaky with the living, the biological. For our coverage, we’ll stick to it as it applies to simple machines, basic laws of physics, and how they become the complex mechanical systems that surrounds us.

Now you may think that such coverage is a little rudimentary for MAKE, the sort of foundational knowledge we all should have long-ago absorbed in grade school. But I think that’s part of the problem. Understanding these basics is something that some folks may not have paid much attention to in school, but now they’ve become makers and they have holes in their knowledge, gaps they may be too embarrassed to admit to. Understanding basic physical properties, simple machines, basic mechanics can go a long way toward being able to understand, troubleshoot, design, and build more complex machines.

I suspected that Make: Electronics was likely to be a big success because I knew there was a dearth of clear, well-organized, plain English content explaining the rudimentary principles of electronics so that mortals could understand them. Similarly, I think a lot of people don’t know, for instance, how gear trains work and how to figure out gear ratios for building a vehicle drive train, or how to effectively use a block and tackle to safely move a load, or how stresses, load-bearing, friction, pressure, and other forces effect the integrity of objects. These are the sorts of mechanical concepts and skills every maker should know.

We’re looking forward to seeing how we can cover all of this in a fun, creative way, from talking to kinetic sculptors, to rounding up some of the best physical science content we’ve published previously (here and in the magazine), to original feature articles covering various aspects of physical science and mechanics.

As always, we’d love your input. If there’s something you’d like for us to cover, or you have some special knowledge in this area, or if there are any key resources, tutorials, etc. that you think we should include, please send them along. Thanks!

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Table of simple mechanisms, from Chambers’ Cyclopedia, 1728.

Short Circuit: Direct digital synthesizer

I’m glad to see Jeri is back to doing her quick n’ dirty “Short Circuit” videos, where she shoots, edits, and uploads a benchtop tutorial video in record time. Sure they’re funky, but they get their point across.

In this video, she shows you how to make a simple audio direct digital synthesizer (DDS) using a 74HC4060, EPROM, and a few passive components.

Fatman and Circuit Girl

Tim's propane vehicles

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MZ_AltTransportation-Badge.gifTim Wicks sent me a bundle of images of some propane vehicles that he and a buddy built — a couple of campground runabouts that fold and stow below their RVs, and a propane-powered mini-bike.

I asked Tim for some additional details but have yet to hear back. I wanted to get this post up during Alt.Transportation month. Maybe he can fill us in on some background for these images in the comments, if he reads this. Oh, Tim…?

[More photos after the jump]

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Speedy micromouse maps, navigates course

The micromouse competition might not be anything new, but I’m constantly amazed by the awesome performance that competitors manage to squeeze out of these tiny bots. Shown above is, it appears, the Bee robot by Japanese builder Kato-san. [via iheartrobotics]

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