DIY Ring Light Takes Its Cues From Fiber Optic Toys

March 3, 2011 by Mike Nathan 11 Comments

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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.

LED Artwork Disappears Right Before Your Eyes

March 2, 2011 by Mike Nathan 47 Comments

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If you walked into an art gallery and saw nothing but blank canvases lining the wall, you might be compelled to demand your money back, or assume that you had discovered the world’s laziest artist. If this gallery happened to be displaying work by [Brad Blucher and Kyle Clements] however, you would be mistaken.

These two artists have collaborated to create a series of works titled, “Take a Picture“. Each picture they have built is constructed to look like an empty canvas when viewed with the naked eye. If you were to take a picture of the canvas with your cell phone or digital camera however, a whole new world would open up in front of your eyes. Their artwork is constructed using infrared LEDs, which cannot be seen with the naked eye, but are visible to nearly any CMOS or CCD sensor on the market. The images range from simple smiley faces and objects to abstract geometric shapes.

It’s a very simple, yet novel approach, and we happen to think it’s pretty cool. The artists have not said what they have planned for this project in the future, but we’d love to see it expanded using larger LED arrays to display higher-resolution images, or even short movies.

Keep reading to see how they went about creating these works of art as well as a promo video demonstrating the effect.

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Power Adapter For Digital Cameras Without An External Jack

February 20, 2011 by Mike Szczys 21 Comments

[Kusnick] is into using digital camera rigs for book scanning. The problem is that keeping the batteries charged is a pain, but there’s no external AC adapter jack which would allow him to use the mains. His solution was to build his own adapter to replace the batteries.

There are some fancy book scanning setups that allow you to just flip through the pages, but it’s much simpler to build a rig that uses two cameras. [Kusnick’s] setup is the latter, which means he’s found two inexpensive cameras that don’t need to be mobile. The first attempt at making an adapter featured a block of acrylic with the positive and negative contacts connected to a shielded cord which he then hooked to an external supply. The camera would come on and then turn off citing that the cameras were “for use with compatible battery only”. Turns out there’s some type of verification circuit built into the proprietary batteries. But the solution to that came quite easily; remove the circuit board from the battery and insert it in the adapter to trick the camera.

[Thanks Daniel]

Stackable Macro Photography Rig

February 19, 2011 by Mike Szczys 14 Comments

When taking macro photographs you lose a lot of clarity due to a reduced depth of field. One way to get sharp pictures is to take multiple shots at slightly different distances from the subject and then stack them into one image. There’s software to do this for you, but you still need a set pictures to start with. [Dsvilko] built this setup to easily capture a set of macro images.

He’s using the internals from an optical drive as a sled to carry the subject. A PICAXE drives the stepper motor that moves the carriage, which takes input from an IR remote control. This turns out to be a fantastic method as the sled can move in 0.2mm increments. After he’s got his set of images he uses Zerene to stack them together.

Bonus points to [Dsvilko] who used Linux command line tools to edit together the demonstration video embedded after the break.

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Cyborg Camera Mask

February 18, 2011 by Kevin Dady 8 Comments

[Ryan] whipped up this robotic masquerade mask to wear to his wife’s art opening / masquerade party, and its pretty wild. The prominent feature of this mask is a scavenged lens assembly from a typical point n shoot style camera, which is still connected to its electronics so it can go through its off and self check functions. You cant see through it, but with moving parts and a red LED inside, it does create an awesome cyborg type appearance,

The movement of the lens assembly is triggered by a thermistor inside of the mask’s nose piece, warm air exhaled onto to it for a given period of time changes the resistance and is monitored by a micro controller, which seems to act like a toggle style switch.

While there is not a build log, parts list, or many details, the schematic is provided for you to look over if you want to try and make your own.

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Guitar-mounted Camera Documents Your Guitar Hero-ness

February 16, 2011 by Mike Szczys 5 Comments

[The Longhorn Engineer] wanted to record some of his virtual shredding sessions so he built this camera mount for a Guitar Hero controller. It holds the camera about a foot below the bottom of the controller, pointing up at the guitar and its player. Since the camera is held tightly to the guitar this produces an interesting effect of movement in the background while the foreground is completely stationary. He set out to complete the build using just one piece of acrylic and some fasteners but added an aluminum support piece because the prototype had a bit too much flex to it. The video after the break walks you through the design, the build process, and finishes with a test run.

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Long-range Laser Night-vision

February 16, 2011 by Mike Szczys 24 Comments

[Oneironaut] is back at it again, churning out yet another great hack in this long-distance night vision build. This isn’t the first time we’ve seen him build a night vision device, you may remember the monocle he put together using the view finder from an old camcorder. This time around he’ll give you look at distant object by using a laser instead of LEDs. He pulled an IR laser diode out of an old CD burner, then used a lens to spread out the dot in order to illuminate a larger area. A standard rifle scope is used as the optics, along with a security camera which can detect the infrared light. As always, he’s done a fantastic job with the images and the write-up. You’ll find his overview video embedded after the break.

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