Audio Two-fer – Sneaker Speakers And DIY Mid-Fi Woofers

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Nike Air Force 1 shoes are probably some of the most well-recognized sneakers around the world, aside from the always timeless Chuck Taylor All Stars. So when [Alex Nash] was asked to create some art using something ordinary with a goal of turning it into something special,  he immediately grabbed a pair and got to work.

His vision was to build a set of PC speakers by embedding a small amplifier and speakers into a pair of Air Force 1s. As you can see from the pictures on his site, they look awesome. He doesn’t say how good they sound, but we’re betting they perform better than that old pair that came with your last computer.

When [Stacy] was in college, she didn’t have a ton of room or money for a nice audio setup, so she decided to build a pair of speakers rather than buying them. She admits that these “Mid-Fi” woofers won’t be the centerpiece of your Hi-Fi setup, but they still sound pretty darn good for $50 DIY speakers. She compares them to units you would find in the store for $300+, and they sound so good she continues to use them as a compliment to the rest of her Hi-Fi setup now that she has a place of her own.

DIY Ring Light Takes Its Cues From Fiber Optic Toys

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DIY ring light setups for DSLR cameras are nothing new around here. While most of them rely on an array of LEDs or a mirror-based light tube, [Wolf] had a different idea. He figured that since optical fibers are made specifically for transmitting light from one place to another, they would make a perfect medium for constructing a ring light.

Since he was using the camera’s built-in flash to power the ring light, he was able to provide a function that few other DIY ring lights do: proper flash compensation. Typically, a self-made ring light flashes at one set brightness, regardless of how much light is actually required to compose the image.

The construction was relatively simple, albeit time consuming. He procured a set of fiber optic cables that had been melted together into 150 small bundles, which he then glued to an acrylic ring that he fabricated. The end result isn’t the most aesthetically pleasing ring light we’ve ever seen, but it’s the pictures that matter at the end of the day. As you can see on his site, they speak for themselves.

Looking to build your own ring light? Check out a couple of other projects we have featured in the past.

DIY Emergency Lighting System

diy_emergency_lighting_system

When the power goes out at home, what do you do? Most of us probably scramble around the house looking for a flashlight. [Gigawatts] wanted a better solution, so he built an emergency lighting system based off a standard household UPS. A while back he had constructed a relay-switched outlet box to help periodically restart his cable modem which would get hung up a little too often for his liking. Since changing Internet providers, he no longer needed the switched outlet box, and was looking for a way to reuse it.

He hooked up the outlet box into the “battery powered” side of the UPS, and inserted a light bub into the normally closed half of the switch box. A 5v power supply was hooked into the “surge protection only” side of the UPS and is used to keep the relay switched. This causes the half of the switch box that is normally closed to remain open, and the light switched off. When power is lost, the 5v supply no longer switches the relay, and the light is turned on – powered by the UPS battery.

This is quite a useful hack if you happen to have a spare UPS sitting around – it sure beats scrambling around searching for a flashlight in the dark!

DIY Ultrasonic Range Finder For $5

After finding some ultrasonic transducers online for a dollar each [Kerry Wong] decided to create an ultrasonic range finder. The result is much like parallax’s PING))) sensor but much cheaper. His post is not only a good way to save some money, but also does a good job of explaining how ultrasonic sensors work.  The transmit circuit is essentially an H-bridge, much like what you would use to control a motor. To listen to the returning echo he uses a pair of high gain/low noise op-amps to filter and amplify the signal.  The board he uses to test the range finder (not included in the cost) is an ATMega328 running the Arduino boot loader.  He also provides lots of example code to boot.

Ride Fly: Segway DIY

[vimeo http://vimeo.com/4317930%5D

The video above is the final working DIY Segway from [sb-scooter]. The website and build log don’t have a lot of information at the moment, but you can still gawk at several pictures of the construction (and a picture is worth 1000 German words).

For those looking for the nitty gritty, with some quick math we figure its two 500 watt motors, powered by 12Ah batteries, will last about 90 minutes. If you’re looking for more details or to build your own, you’re as lost as we are.

[Thanks Panikos]

Humble Homes, Simple Shacks

[Derek] puts the “hack” into the word shack.  We really enjoyed his “little yellow house” videos and shared them with you. After that, we discovered that he has published a book. No, he didn’t have it published, he published it. This guy is DIY through and through. “Humble Homes, Simple Shacks, Cozy Cottages, Ramshackle Retreats, Funky Forts (And Whatever The Heck Else We Could Squeeze In Here)” was hand produced by [Derek] himself.  It includes plans for a number of different shacks, ranging in size from too tiny for an adult to large enough to house a family. Not all of them are completely practical, but there are several that would make perfect workshops.

We got a copy of the book and have been getting lost in the seemingly endless illustrations. We highly recommend that you do so as well, if you have any interest in building from scrap, or unique structures. Even if you aren’t that interested in construction, the eclectic style and humorous rants about waste might just be enough to keep this book around.

How-to: DIYDTG

For those unaware, the little acronym above stands for Do-It-Yourself-Direct-To-Garment printing. In layman’s terms, printing your own shirts and designs. Commercial DTGs can cost anywhere from $5,000 to $10,000 which for the hobbyist who only wants a few shirts is ridiculous. So you would think this field of technology would be hacked to no end, but we’ve actually only seen one other fully finished and working DIYDTG. So we took it upon ourselves to build a DIYDTG as cheaply and as successfully as possible. Continue reading “How-to: DIYDTG”