Improving A Modern Instant Camera

Instant film never went away – Fujifilm has been producing instant film for decades before Polaroid ceased production. Yes, cries of a lost photographic heritage were all for naught, and you can still buy an instant camera. [Dan] picked up a Fujifilm Instax Wide camera – an instant camera that produces not-square images – and figured some electronic tinkering could vastly expand the capabilities of this camera. He took it apart and made some modifications, giving it a bulb mode for long exposures and multi-exposure capability.

[Dan] began his tinkering by figuring out how to put multiple exposures on one frame of film. The Instax Wide camera has an eject sensor, a wire for the shutter button, and a few wires leading to the motor. By adding a switch to turn off the motor and a pushbutton to bypass the ejection sensor, [Dan] can stack multiple exposures on a single frame of film.

Multiple exposures are one thing, but how about longer exposures for light painting and all those other cool things you can do with microcontrolled LEDs? Modding the camera for that is pretty easy. All you need are a few mini toggle switches. It’s just a simple matter of opening the shutter for as long as you need, painting a scene with light, and flipping a few more switches to eject the film. [Dan] is getting some pretty respectable exposures with this – somewhat impressive considering the camera’s fixed aperture.

Ephemeral Photographs Staged with Artful Inventions

[Gordon Kirkwood’s] focus as a photographer is in capturing ephemeral phenomena, that is, things that are exhilarating to see but also fleeting. In the pursuit of documenting such blips of beauty found in the natural word, he has taken on engineering the circumstance through which they occur by means of technology.

One of the amazing mechanical creations he’s constructed to aid in his photography is a large computer controlled, bubble blower. A few stepper motors work to dilate three segments of soap-soaked rope engaged at 120 degree angles to create a triangular aperture. When the aperture closes, the segments overlap slightly, covering themselves with a consistent coating of suds. When the segments stretch apart, a fan blows a current of air towards the center, pushing the sheath of fluid into ginormous glimmering orbs which he uses as the focal point in some of his photographs.

bubbleAparatus

More currently, [Gordon] has been developing a body of work that involves zapping botanical subject matter with a quarter-million volts from a portable arc producing device he’s created and capturing the reaction with an ultra low-tech camera (the kind with the bellow and sheet you hide under while exposing the film). Using a method all his own, the shots recorded on large format film are claimed to turn out with even more clarity than any current digital camera in use today. [Gordon] has launched a crowd funding campaign to support a pilgrimage to the majestic island of Hawaii, where he’ll use his lightning producing apparatus on ten different specimens of tropical plant life so that he can record the outcome with his tried and proven technique. (see below an artsy shot of his lightning summoner)

lighteningAparatus

Sometimes Kickstarter isn’t so much about commercialism as it is starting a dialogue with the world and beginning a personal adventure. May the journey lead to new inventions and larger, more ambitious projects! Oh yeah- the bubble blowing machine is a must-see in action. Wicked cool:

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Photographing a Display Controller Die

Who doesn’t like integrated circuit porn? After pulling a PCD8544 display controller from an old Nokia phone, [whitequark] disrobed it and took the first public die shot.

As we’ve seen in the past, removing a die from its packaging can be a challenge. It typically involves nasty things like boiling acid. Like many display controllers, the PCD8544 isn’t fully encapsulated in a package. Instead, it is epoxied to a glass substrate.

Removing the glass proved to be difficult. [whitequark] tried a hot plate, a hot air gun, sulphuric acid, and sodium hydroxide with no success. Then the heat was turned up using MAPP gas, which burned the epoxy away.

After some cleaning with isopropanol, the die was ready for its photoshoot. This was done using a standard 30 mm macro lens. Photo processing was done in darktable, an open source photography tool and RAW processor.

[whitequark] plans to take closer photos in the future using more powerful magnification. These high resolution die photos can be useful for a number of things, including finding fake chips and reverse engineering retro hardware.

Finding Meteors, Satellites, and Star Trails with a Raspberry Pi

meteorite

The Raspberry Pi is an incredibly popular, cheap, and low power computer that also has a nifty camera add-on that is completely programmable. This opens up a log of possibilities for long-exposure photography, and [Jippo] has found the best use so far: long exposure astrophotography for capturing meteors, satellites, and star trails.

[Jippo] is using a stock Raspi and camera module with a little bit of custom software written by his friend [Jani Lappalainen] that grabs image data from the camera and saves it either as a time-lapse, or only when something significantly changes. This would include meteors and Iridium flares, as well as passing planes, reflections of satellites, and of course long-exposure star trails.

So far, [Jippo] has already captured enough images to amount to a great night of skywatching. There’s a great picture of a meteor, a few pictures of satellites reflecting the sun, and some great star trails. The software [Jippo] is using is available on his site along with a gallery of his highlight reel.

Timelapse Photography on an Android-Powered Dolly

camera dolly

If you’re heading off on a trip to Alaska, you need to make sure you have plenty of supplies on hand for the wilderness that awaits. If you’re [Bryce], that supply list includes some interesting photography equipment, including a camera dolly that he made to take time-lapse video of the fantastic scenery.

On the hardware side, the dolly carries the camera on a rail that is set up on a slant. The camera starts on one side and moves up and towards the otherside which creates a unique effect in the time-lapse. The rig is driven by a stepper motor, and rides on some pretty fancy bearings. The two cameras [Bryce] plans to use are a Canon T2i and a EOS-M which sit on the top from a tripod.

The software and electronics side is interesting as well. Instead of the usual Arduino, [Bryce] opted for controlling the rig through Android and a IOIO board. This gives the project a lot of options for communications, including Bluetooth. The whole thing is powered by a 19V battery pack. If you’re looking for something a little simpler, you might want to check out the egg timer for time lapse! Check out the video of [Bryce]’s rig in action after the break.

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Simple Photo Flash Trigger for Water Balloon Photography

Water Balloon Photography

There have been countless projects to make custom photo flash trigger circuits. Usually the circuits react to sound, triggering the camera flash at the moment a certain sound is triggered. That type of trigger can be used to detect the popping of a balloon or shattering of glass. Other triggers detect motion, like a projectile crossing a laser beam for example. [Udo’s] friend had a fun idea to take photos of water balloons popping. Unfortunately neither of those trigger methods would be well suited for this situation. That’s when [Udo] had to get creative.

[Udo] built a unique trigger circuit that uses the water inside the balloon as the trigger. The core component of the circuit is an Arduino. One of the Arduino’s analog pins is configured to enable the internal pull-up resistor. If nothing else is connected to the pin, the Arduino will read 5 volts there. The pin is connected to a needle on the end of a stick. There is a second needle on the same stick, just a short distance away from the first. When these needles pierce the balloon’s skin, the water inside allows for a brief moment of conductivity between the two pins. The voltage on the analog pin then drops slightly, and the Arduino can detect that the balloon has popped.

[Udo] already had a flash controller circuit. He was able to trigger it with the Arduino by simply trying the flash controller’s trigger pin to one of the Arduino’s pins. If the Arduino pulls the pin to ground, it closes the switch on the flash controller and the flash is triggered. Both circuits must share a common ground in order for this to work.

All of the code for [Udo’s] project is freely available. With such spectacular photographs, it’s only a matter of time before we see more of these floating around.

Reverse Engineering a Wireless Studio Lighting Remote

If you want to take a photograph with a professional look, proper lighting is going to be critical. [Richard] has been using a commercial lighting solution in his studio. His Lencarta UltraPro 300 studio strobes provide adequate lighting and also have the ability to have various settings adjusted remotely. A single remote can control different lights setting each to its own parameters. [Richard] likes to automate as much as possible in his studio, so he thought that maybe he would be able to reverse engineer the remote control so he can more easily control his lighting.

[Richard] started by opening up the remote and taking a look at the radio circuitry. He discovered the circuit uses a nRF24L01+ chip. He had previously picked up a couple of these on eBay, so his first thought was to just promiscuously snoop on the communications over the air. Unfortunately the chips can only listen in on up to six addresses at a time, and with a 40-bit address, this approach may have taken a while.

Not one to give up easily, [Richard] chose a new method of attack. First, he knew that the radio chip communicates to a master microcontroller via SPI. Second, he knew that the radio chip had no built-in memory. Therefore, the microcontroller must save the address in its own memory and then send it to the radio chip via the SPI bus. [Richard] figured if he could snoop on the SPI bus, he could find the address of the remote. With that information, he would be able to build another radio circuit to listen in over the air.

Using an Open Logic Sniffer, [Richard] was able to capture some of the SPI communications. Then, using the datasheet as a reference, he was able to isolate the communications that stored information int the radio chip’s address register. This same technique was used to decipher the radio channel. There was a bit more trial and error involved, as [Richard] later discovered that there were a few other important registers. He also discovered that the remote changed the address when actually transmitting data, so he had to update his receiver code to reflect this.

The receiver was built using another nRF24L01+ chip and an Arduino. Once the address and other registers were configured properly, [Richard’s] custom radio was able to pick up the radio commands being sent from the lighting remote. All [Richard] had to do at this point was press each button and record the communications data which resulted. The Arduino code for the receiver is available on the project page.

[Richard] took it an extra step and wrote his own library to talk to the flashes. He has made his library available on github for anyone who is interested.