Camera Mod Lets this Raspberry Pi Shoot in Different Spectrums

For [Peter Le Roux'] first “real” electronics project, he decided to make a camera based off the venerable Raspberry Pi platform. But he didn’t just want a regular camera, he wanted something that could shoot in near IR wave lengths…

It’s a well-known fact that you can remove the IR blocking filter from most cameras to create a quasi IR camera hack – heck, that hack has been around nearly as long as we have! The problem is even if you let the IR light into the camera’s sensor, you still get all the other light unless you have some kind of filter. There are different ways of doing this, so [Peter] decided to do them all with an adjustable wheel to flip through all the different filters.

He designed the case after the PiBow enclosure – you can see our full Pi Case Roundup here - and had it all laser cut out of wood. Stick around after the break to see a nice explanation of the light spectrum and the various filters [Peter] uses.

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Adding a Digital Back to a Sweet Old Camera

[Eugene] wanted to use his vintage Leica M4 as a digital camera, and he had a Canon EOS 350D digital camera sitting around unused. So he Frankensteined them together and added a digital back to the Leica’s optical frontend.

It sounds simple, right? All you’d need to do is chop off the back from the EOS 350D, grind the digital sensor unit down to fit into exactly the right spot on the film plane, glue it onto an extra Leica M4 back door, and you’re set. Just a little bit of extremely precise hackery. But it’s not even that simple.

Along the way [Eugene] reverse-engineered the EOS 350D’s shutter and mirror box signals (using a Salae Logic probe), and then replicated these signals when the Leica shutter was tripped by wedging an Arduino MiniPro into an old Leica motor-winder case. The Arduino listens for the Leica’s bulb-flash signal to tell when the camera fires, and then sends along the right codes to the EOS back. Sweet.

There are still a few outstanding details. The shutter speed is limited by the latency in getting the signal from the Leica to the 350D back, so he’s stuck at shutter speeds longer than 1/8th of a second. Additionally, the Canon’s anti-IR filter didn’t fit, but he has a new one ordered. These quibbles aside, it’s a beautiful hack so far.

What makes a beautiful piece of work even more beautiful? Sharing the source code and schematics. They’re both available at his Github.

Of course, if you don’t mind completely gutting the camera, you could always convert your old Leica into a point and shoot.

Third Person Skydiving

GoPros were invented for a few reasons, and skydiving is right at the top of that list. You’ll be hard pressed to find a regular skydiver that doesn’t own at least one of the little cameras, and there are a few examples of helmets with three or four GoPros tacked on.

This is an entirely new application. Yes, you can now film yourself skydiving with a third person view.

[Jason] hacked together this camera rig in an hour by strapping a GoPro on a Nerf Vortex football, tying a length of paracord to the camera mount, and connecting the other end to a hip ring on the parachute harness. It took three flights to get the canopy in the camera’s field of view, but the results are spectacular. It’s a tad bit unstable when turning, but the fins on the Nerf football make for a very, very stable shot.

[Jason] isn’t jumping out of a plane with this contraption already dangling underneath him; the football, camera, and paracord rig isn’t launched until the canopy fully deploys. It’s perfectly safe, but we’ll expect someone to get the idea of strapping a keychain camera to their pilot chute soon.

Auto-Balancing Gimbal Keeps your Coffee from Spilling

[Joe] works in one of those fancy offices that has some… unique furniture. Including a swinging boardroom table. See where we’re going with this? [Joe] made his own coffee cup gimbal.

The gimbal itself is made out of solid steel, welded together for maximum durability. He first built it out of plastic to test the concept, but then quickly moved to the all-metal solution. It’s a 2-axis gimbal featuring very powerful brushless DC motors, capable of balancing even a light-weight DSLR — however we think balancing a coffee cup is much more entertaining. It does this with ease, even when sitting on the treacherous swinging boardroom table (of DOOM).

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Controlling a Point and Shoot With Bluetooth

Loading point and shoot digital cameras is old hat around here, but [Alex] and [Andreas] are taking it to the next level. They’ve made a Bluetooth controller for a cheap Canon camera, allowing pictures to be taken with an iPhone or Android device.

The camera in question is a Canon IXUS70, although any camera supported by CHDK will work. We’ve seen a few builds using this firmware to take pictures of the sunrise every day and transmitting images over a radio link, but this build is far more interactive.

The camera is connected to an Arduino and Bluetooth shield with a hacked up USB cable. The ‘duino communicates with a phone using a JQuery app, giving any phone with a Bluetooth module control of the camera’s zoom and shutter.

All the code is available on the github, with a very good video demonstration of the build available below.

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The FrankenCamera: Digitizing Old School Film into Something New

After being awarded a generous sum of money from a scholarship fund, [Ollie] decided to utilize some of the cash to convert an analog camera into a device that could store photos onto an SD card. The result was this FrankenCamera that was pieced together from multiple electronic parts to create a new photograph-taking machine.

The Konica Auto S3 rangefinder was chosen due to its stellar fixed 38mm f1.8 lens and unobtrusive internal leaf shutter. A Sony NEX-5 was dismantled and the components were removed and transplanted into the Konica Auto S3. This included a circuit board, SD card slot, and battery connector.

The housing for the electronics was 3D printed from CAD files that were developed in SolidWorks. Designs were sent to a company in London who did the actual SLS printing.

Once completed, the camera operated just like any digital camera, but with the added twist of knowing that it was created from an old school camera frame with new electronic parts, making it a nice hacked together work of functional art.

Videos of the working FrankenCamera can be seen below:

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Rotating Plants for Time-Lapse Purposes

Automating the growing process of plants and vegetables is an increasing trend among gardening enthusiasts and hobbyists. It’s no surprise, either, with microcontrollers, moisture sensors, Co2 detectors, and even time-lapse cameras with rotating wooden rigs that are in the hands of millions of amateur gardeners around the world.

This project by [Liz] helps to document the sprouting process of her tiny grapefruit bonsai tree that started to flourish at her apartment in Chicago.

Similar rigs can be used for practically any type of indoor plant. They can also be modified to move the plants and vegetables depending on how much light they are getting. Even further, just add some code to splice the photographs together and you’ve got yourself a custom setup that can produce animated GIF files to be uploaded easily to the internet. Pages and pages of happy and healthy growing plants unearthing themselves from the ground up would be pasted all over the web showing the entire sprouting process. An example video of this by [Liz] is embedded below.

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