digital cameras hacks

943 Articles

A Twin-Lens Reflex Camera That’s Not Quite What It Seems

February 9, 2025 by 3 Comments

The Camp Snap is a simple fixed-focus digital camera with only an optical viewfinder and a shot counter, which has become a surprise hit among photography enthusiasts for its similarity to a disposable film camera. [Snappiness] has one, and also having a liking for waist-level viewfinders as found on twin-lens reflex cameras, decided to make a new Camp Snap with a waist-level viewfinder. It’s a digital twin-lens reflex camera, of sorts.

Inside the Camp Snap is the little webcam module we’ve come to expect from these cameras, coupled with the usual microcontroller PCB that does the work of saving to SD card. It’s not an ESP32, but if you’ve ever played with an ESP32-CAM board you’re on a similar track. He creates a 3D-printed TLR-style case designed to take the PCB and mount the camera module centrally, with ribbon cable extensions taking care of placement for the other controls. The viewfinder meanwhile uses a lens, a mirror, and a Fresnel lens, and if you think this might look a little familiar it’s because he’s based it upon his previous clip-on viewfinder project.

The result, with an added “Snappiflex” logo and filter ring, is a rather nice-looking camera, and while it will preserve the dubious quality of the Camp Snap, it will certainly make the process of using the camera a lot more fun. We think these cheap cameras, and particular their even less expensive AliExpress cousins, have plenty of hacking potential as yet untapped, and we’re keen to see more work with them. The full video is below the break.

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A Waist Level Viewfinder For Not A Lot

January 26, 2025 by 8 Comments

Photographic accessories are often plagued by high prices, as photography is considered a rich man’s game. It doesn’t have to be that way though, and [Snappiness] is here to get you started on the route to cheaper kit with a waist-level viewfinder project.

If you’ve used a twin-lens reflex camera then you should be familiar with a waist level viewfinder, it’s a lens and mirror arrangement allowing the photographer to frame the shot looking down from above. Modern cameras often have no viewfinder, so this is aimed at digital compacts without flip-up screens.

It has three components, all available for relatively low prices, and mounted in a 3D printed case. There’s a prime lens, a mirror, and a Fresnel lens forming the part the photographer looks through. It’s a simple device, but still one which would cost a lot more off the shelf. The video is below the break.

It might interest you to know that this is not the first viewfinder project we’ve brought you for digital cameras.

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Release Your Inner Ansel Adams With The Shitty Camera Challenge

December 30, 2024 by 22 Comments

Social media microblogging has brought us many annoying things, but some of the good things that have come to us through its seductive scrolling are those ad-hoc interest based communities which congregate around a hashtag. There’s one which has entranced me over the past few years which I’d like to share with you; the Shitty Camera Challenge. The premise is simple: take photographs with a shitty camera, and share them online. The promise meanwhile is to free photography from kit acquisition, and instead celebrate the cheap, the awful, the weird, and the wonderful in persuading these photographic nonentities to deliver beautiful pictures.

Where’s The Hack In Taking A Photo?

Of course, we can already hear you asking where the hack is in taking a photo. And you’d be right, because any fool can buy a disposable camera and press the shutter a few times. But from a hardware hacker perspective this exposes the true art of camera hacking, because not all shitty cameras can produce pictures without some work.

The #ShittyCameraChallenge has a list of cameras likely to be considered shitty enough, they include disposables, focus free cameras, instant cameras, and the cheap plastic cameras such as Lomo or Holga. But also on the list are models which use dead film formats, and less capable digital cameras. It’s a very subjective definition, and thus in our field everything from a Game Boy camera or a Raspberry Pi camera module to a home-made medium format camera could be considered shitty. Ans since even the ready-made shitty cameras are usually cheap and unloved second-hand, there’s a whole field of camera repair and hacking that opens up. Finally, here’s a photography competition that’s fairly and squarely on the bench of Hackaday readers. Continue reading “Release Your Inner Ansel Adams With The Shitty Camera Challenge” →

Stripping GoPros To The Bone For Model Rocketry

December 1, 2024 by 11 Comments

The small size of action cameras has made them a great solution for getting high-quality experimental footage where other cameras don’t fit. GoPros are [Joe Barnard]’s camera of choice for his increasingly advanced rockets, but even the smallest models don’t quite fit where he needs them. They also overheat quickly, so in the video after the break, he demonstrates how he strips and customizes them to fit his required form factor.

[Joe] starts out with a GoPro HERO10 Bones, which is a minimalist version intended for FPV drones. He likes the quality of the 4K 120 FPS video and the fact that he can update the settings by simply holding up a QR code in front of the camera. The case appears to be ultrasonically welded, so careful work with a Dremel is required to get it open. The reveals the control board with an aluminum heat sink plate, and the sensor module on a short ribbon cable. For minimal drag[Joe] wants just the lens to poke out through the side of the rocket, so he uses slightly longer aftermarket ribbon cables to make this easier.

The camera’s original cooling design, optimized for drone airflow, meant the device would overheat within 5 minutes when stationary. To increase the run time without the need for an external heat sink, [Joe] opts to increase the thermal mass by adding thick aluminum to the existing cooling plate with a large amount of thermal paste. In an attempt to increase heat transfer from the PCB, he also covers the entire PCB with a thick layer of thermal paste. Many of the video’s commenters pointed out that this may hurt more than it helps because the thermal paste is really intended to be used as a thin layer to increase the contact surface to a heat sink. It’s possible that [Joe] might get better results with just a form-fitting thermal block and minimal thermal paste.

[Joe] is permanently epoxying three of these modified cameras into his latest rocket, which is intended to fly at Mach 3, and touch space. This may look like a waste of three relatively expensive cameras, but it’s just a drop in the bucket of a very expensive rocket build.

We’ve seen GoPros get (ab)used in plenty of creative ways, including getting shot from a giant slingshot, and reaching the edge of space on a rocket and a balloon.

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A Very Fast Camera Slider For The Glam Shot

November 18, 2024 by 7 Comments

High-speed photography with the camera on a fast-moving robot arm has become all the rage at red-carpet events, but this GlamBOT setup comes with a hefty price tag. To get similar visual effects on a much lower budget [Henry Kidman] built a large, very fast camera slider. As is usually the case with such projects, it’s harder than it seems.

The original GlamBOT has a full 6 degrees of freedom, but many of the shots it’s famous for are just a slightly curved path between two points. That curve adds a few zeros to the required budget, so a straight slider was deemed good enough for [Henry]’s purposes. The first remaining challenge is speed. V1 one used linear rails made from shower curtain rails, with 3D printed sliders driven by a large stepper motor via a belt. The stepper motor wasn’t powerful enough to achieve the desired acceleration, so [Henry] upgraded to a more powerful 6 hp servo motor.

Unfortunately, the MDF and 3D-printed frame components were not rigid enough for the upgraded torque. It caused several crashes into the ends of the frame as the belt slipped and failed to stop the camera platform. The frame was rebuilt from steel, with square tubing for the rails and steel plates for the brackets. It provided the required rigidity, but the welding had warped the rails which led to a bumpy ride for the camera so he had to use active stabilization on the gimbal and camera. This project was filled with setback and challenges, but in the end the results look very promising with great slow motion shots on a mock red carpet.

We’ve seen DIY camera sliders of all shapes and sizes, including ones made from skateboard trucks and wood, and even a measuring tape.

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Lock-In Thermography On A Cheap IR Camera

October 28, 2024 by 16 Comments

Seeing the unseen is one of the great things about using an infrared (IR) camera, and even the cheap-ish ones that plug into a smartphone can dramatically improve your hardware debugging game. But even fancy and expensive IR cameras have their limits, and may miss subtle temperature changes that indicate a problem. Luckily, there’s a trick that improves the thermal resolution of even the lowliest IR camera, and all it takes is a little tweak to the device under test and some simple math.

According to [Dmytro], “lock-in thermography” is so simple that his exploration of the topic was just a side quest in a larger project that delved into the innards of a Xinfrared Xtherm II T2S+ camera. The idea is to periodically modulate the heat produced by the device under test, typically by ramping the power supply voltage up and down. IR images are taken in synch with the modulation, with each frame having a sine and cosine scaling factor applied to each pixel. The frames are averaged together over an integration period to create both in-phase and out-of-phase images, which can reveal thermal details that were previously unseen.

With some primary literature in hand, [Dmytro] cobbled together some simple code to automate the entire lock-in process. His first test subject was a de-capped AD9042 ADC, with power to the chip modulated by a MOSFET attached to a Raspberry Pi Pico. Integrating the images over just ten seconds provided remarkably detailed images of the die of the chip, far more detailed than the live view. He also pointed the camera at the Pico itself, programmed it to blink the LED slowly, and was clearly able to see heating in the LED and onboard DC-DC converter.

The potential of lock-in thermography for die-level debugging is pretty exciting, especially given how accessible it seems to be. The process reminds us a little of other “seeing the unseeable” techniques, like those neat acoustic cameras that make diagnosing machine vibrations easier, or even measuring blood pressure by watching the subtle change in color of someone’s skin as the capillaries fill.

An Arduino Triggers A Flash With Sound

October 15, 2024 by 37 Comments

To capture an instant on film or sensor with a camera, you usually need a fast shutter. But alternately a flash can be triggered with the scene in the dark and the shutter wide open. It’s this latter technique which PetaPixel are looking at courtesy of the high-speed class at Rochester Institute of Technology. They’re using a cheap sound sensor module and an Arduino to catch instantaneous photographs, with students caught in the act of popping balloons.

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