Inspired by battle-hardened military robots, [Engineering Juice] wanted to build his own remote controlled rover that could deliver live video from the front lines. But rather than use an off-the-shelf tracked robot chassis, he decided to design and 3D print the whole thing from scratch. While the final product might not be bullet proof, it certainly doesn’t seem to have any trouble traveling through sand and other rough terrain.
Certainly the most impressive aspect of this project is the roller chain track and suspension system, which consists of more than 200 individual printed parts, fasteners, bearings, and linkages. Initially, [Engineering Juice] came up with a less complex suspension system for the robot, but unfortunately it had a tendency to bind up during testing. However the new and improved design, which uses four articulated wheels on each side, provides an impressive balance between speed and off-road capability.
Internally there’s a Raspberry Pi 4 paired with an L298 dual H-bridge controller board to drive the heavy duty gear motors. While the Pi is running off of a standard USB power bank, the drive motors are supplied by a custom 18650 battery pack utilizing a 3D printed frame to protect and secure the cells. A commercial night vision camera solution that connects to the Pi’s CSI header is mounted in the front, with live video being broadcast back to the operator over WiFi.
Night vision aficionado [Nicholas C] shared an interesting teardown of a Norwegian SIMRAD GN1 night vision device, and posted plenty of pictures, along with all kinds of background information about their construction, use, and mounting. [Nicholas] had been looking for a night vision device of this design for some time, and his delight in finding one is matched only by the number of pictures and detail he goes into when opening it up.
What makes the SIMRAD GN1 an oddball is the fact that it doesn’t look very much like other, better known American night vision devices. Those tend to have more in common with binoculars than with the GN1’s “handheld camera” form factor. The GN1 has two eyepieces in the back and a single objective lens on the front, which is off-center and high up. The result is a seriously retrofuturistic look, which [Nicholas] can’t help but play to when showing off some photos.
[Nicholas] talks a lot about the build and tears it completely down to show off the internal optical layout necessary to pipe incoming light through the image intensifier and bend it around to both eyes. As is typical for military hardware like this, it has rugged design and every part has its function. (A tip: [Nicholas] sometimes refers to “blems”. A blem is short for blemish and refers to minor spots on optics that lead to visual imperfections without affecting function. Blemished optics and intensifier tubes are cheaper to obtain and more common on the secondary market.)
In wrapping up, [Nicholas] talks a bit about how a device like this is compatible with using sights on a firearm. In short, it’s difficult at best because there’s a clunky thing in between one’s eyeballs and the firearm’s sights, but it’s made somewhat easier by the fact that the GN1 can be mounted upside down without affecting how it works.
Night vision googles used to be the exclusive preserve of the military, and then of the well-heeled. Image intensifier tubes were very expensive, and needed high-voltage power supplies to keep them going. Now that we have solid-state infra-red cameras the task of seeing in the dark had become much simpler, and [Alex Zidros] is here to show us just how easy that can be. His night vision goggles take a selection of off-the-shelf parts and a little bit of 3D printing to produce a complete set-up for a fraction of the cost of those night-vision goggles of old.
At its heart is a little NTSC/PAL LCD display in a 3D printed bracket. These used to be a small display of choice, but we see them rarely now because standalone displays and the microcontrollers to drive them have become so much more useful. Driving the display is a video camera with its IR filter removed, and providing illumination is an IR flashlight. In effect it’s a classic analogue CCTV system in miniature, but the most important thing is that it works.
Old military equipment can sometimes be found in places like flea markets and eBay for pennies, often because people don’t always know what they have. While [tsbrownie] knew exactly what he was getting when he ordered this mystery device, we’re not sure we could say the same thing if we stumbled upon it ourselves. What looks like a vacuum tube of some sort turns out to be an infrared sensor from an old submarine periscope that was repurposed as a night vision device. (Video, embedded below.)
Of course, getting a tube like this to work requires high voltage. This one specifically needs 3500V in order to work properly, but this was taken care of with a small circuit housed in a PVC-like enclosure. The enclosure houses the tube in the center, with an eye piece at one end and a camera lens at the other, attached presumably by a 3D-printed mount. The electronics are housed in the “grip” and the whole thing looks like a small sightglass with a handle. Once powered up, the device is able to show a classic green night vision scene.
Old analog equipment like this is pretty rare, as are people with the expertise to find these devices and get them working again in some capacity. This is a great video for anyone with an interest in tubes, old military gear, or even if you already built a more modern night vision system a while back.
[Nick Chen] shared some fascinating and useful details about building a AN/PVS-14 monocular night vision device from parts. It’s not cheap, but the build would be a simple one for most Hackaday readers, at least the ones who are residents of the USA. Since the PVS-14 is export controlled under the International Traffic in Arms Regulations (ITAR), parts are not sold outside of the US. Still, [Nick]’s illustrated build instructions provide a good look at what’s inside these rugged devices.
The build consists of purchasing a PVS-14 parts kit (or “housing kit”) which includes nearly everything except the image intensifier module, which must be purchased separately. Once all the parts are in hand, [Nick] explains how to assemble the pieces into a working unit.
Since the image intensifier is by far the most expensive component, there is an opportunity to save money by shopping for what [Nick] calls “blem” units. These units are functional, but have blemishes or dead spots within the field of view. The good news it that this makes them cheaper, and [Nick] points out that as long as the center region of the tube is clear, they are perfectly serviceable.
How much can one save by building from parts? [Nick] says buying a complete PVS-14 with a Gen 3 tube (sensitive to 450-950 nm) can cost between $2500 to $4000. It’s expensive equipment, no doubt, but deals can be found on the parts. Housing kits can be had for well under $1000, and [Nick] has purchased serviceable image intensifiers for between $500 and $1000. He says searching for “blem tubes” can help zero in on deals.
Knowing the right terms for searching is half the battle, and along with his build instructions (and a chunk of cash) a curious hacker would have all they need to make their own. Heck, build two because the PVS-14 is designed such that two units can be combined to make a binocular unit! Not ready to drop that kind of cash? Check out OpenScope, the open source digital night vision tool.
One of the major issues [facelessloser] encountered was power. He found that the Pi (Zero W), the screen, and the IR LEDs draw between 1.5 and 2A altogether. He was able to solve this one by using the charging board from a 2A power bank paired with a 1200mAh Li-Po built for the high draw required by vaping. If not for space issues, he might have used a 18650 or two.
Another challenge he faced was storing the video and images. He’d considered setting up the Pi as an access point to view them from a phone browser, but ultimately extended a USB port with an OTG cable to use flash drives. With a bit of Python he can watch for the drive to mount and then write to it. If the flash drive suddenly disappears, the Pi starts saving to the SD card.
What high-tech, ultra-secure data center would be complete without dozens of video cameras directed both inward and outward? After all, the best informatic security means nothing without physical security. But those eyes in the sky can actually serve as a vector for attack, if this air-gap bridging exploit using networked security cameras is any indication.
It seems like the Cyber Security Lab at Ben-Gurion University is the place where air gaps go to die. They’ve knocked off an impressive array of air gap bridging hacks, like modulating power supply fans and hard drive activity indicators. The current work centers on the IR LED arrays commonly seen encircling the lenses of security cameras for night vision illumination. When a networked camera is compromised with their “aIR-Jumper” malware package, data can be exfiltrated from an otherwise secure facility. Using the camera’s API, aIR-Jumper modulates the IR array for low bit-rate data transfer. The receiver can be as simple as a smartphone, which can see the IR light that remains invisible to the naked eye. A compromised camera can even be used to infiltrate data into an air-gapped network, using cameras to watch for modulated signals. They also demonstrated how arrays of cameras can be federated to provide higher data rates and multiple covert channels with ranges of up to several kilometers.
True, the exploit requires physical access to the cameras to install the malware, but given the abysmal state of web camera security, a little social engineering may be the only thing standing between a secure system and a compromised one.