Creating an open-source quartz crystal microbalance with Arduino

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openQCM is a highly-sensitive microbalance with a wide-range of applications in chemistry, biology and material science.

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Created by a group of Italian physicists, openQCM is a fully open-source quartz crystal microbalance project built around the versatile Arduino Micro (ATmega32U4). Impressively, the gadget is capable of weighing mass deposition down to one billionth of gram.

For those unfamiliar with the piezoelectric devices, a QCM is an extremely sensitive mass sensor capable of measuring mass changes in the nanograms. When an object is placed on the sensor’s surface, the fluctuations in the crystal’s resonant frequency are detected and used to determine its mass in a variety of experimental conditions. In this case, the openQCM was designed for use in air, liquid and vacuum, and features a sensitivity of 700 picograms.

Novaetech S.r.l. initially developed openQCM with the emergent principles of the open-source hardware movement in mind. Team member Marco Mauro notes that while open hardware has already made an impact across a wide-range of segments, when it comes to scientific applications, its potential is even greater.

“openQCM is the first open hardware quartz crystal microbalance with applications in a wide range of scientific fields, such as chemical and biological sensing, material science,” the team writes.

openQCM is based on an Arduino Micro and is powered via USB connection. This enables users to hack the timer counter on the on-board ATmega32U4 to measure the quartz crystal frequency variations using its 16Mhz processor clock. Its creators also designed an Arduino Micro shield with an embedded quartz crystal oscillator driver circuit and a temperature sensor. As noted, this plays an integral role in checking the thermal stabilization of the device. The output of the driver is relayed to the Arduino timer counter, while the analog value of the temperature sensor is fed to the board’s analog pin. This configuration allows researchers to measure quartz crystal frequency with a resolution of 1Hz.

In an effort to reduce costs without sacrificing quality, the team decided to 3D print the openQCM prototypes using the SLS process. Embodying true Maker spirit, this lets everyone modify and print their own enclosure.

“openQCM belongs to a new generation of innovative smart sensor which boast high resolution and ultra high mass sensitivity. The open source strategy made the creation of openQCM available at low cost which represents a bit fraction of the cost of similar scientific products,” the team concludes.

Despite its affordability and ease-of-use, its creators assure its accuracy and stability is fully comparable with most common scientific devices available on the market today. Interested in learning more? Head over to openQCM’s official page here.

UberBlox is a modular metal construction system for Makers

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Build your automated machines and robots with this high-quality advanced modular metal construction system.

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Iconic toy systems like Tinkertoy, LEGO and K’NEX have served as building blocks for the Maker Movement for decades, inspiring young do-it-yourselfers to piece together bricks, interlock rods and connect wheels to whip up some incredible projects. And, it’s clearer than ever before that today’s DIY culture is spurring an appetite for modular tools, as seen with the advent of littleBits, Printoo, Quirkbot, and other open-source machines.

Embodying many of the same principles, the UberBlox Systems team has launched a Kickstarter campaign for a new high-quality metal construction set for Makers looking to devise rigid structures and automated machines. The prototyping system features a unique single-connector locking mechanism that uses a common tool to quickly and precisely lock each block to the next. While traditional plastic pieces are perfectly suitable for simple creations, they typically can’t handle the necessary sturdiness and accuracy of automated machines. And that’s where the aptly-dubbed UberBlox comes in.

Aside from the basic blocks, the kit includes a growing catalog of compatible and reconfigurable parts, such as static and moving components, sub-assemblies, motors, electronics and controllers (referred to as “Brain-Boxes”), which are based on popular boards like Arduino and Raspberry Pi, for a complete solution. These can all be placed inside a standardized UberBlox box that houses the rest of the system, either as a separate control unit or as an integral physical part of a design.

This provides even the most sophisticated Makers the ability to build, power and command impressive machines, ranging from 3D printers and CNC machines to various forms of robots as their knowledge and understanding of the UberBlox system increases. As more elements are added to their platform, users will continually be able to update their hardware for a variety of new purposes just by simply unlocking the metal structures and rebuilding them based on a new design idea. Beyond that, UberBlox allows Makers to quickly and easily test out new design concepts for either entire 3D printing systems or portions of them for that matter, without getting bogged down in the fabrication process. Not only printers, the versatile system can also come in handy for those seeking to construct different types of robots, including manipulator arms, rovers, and humanoids.

“As useful as they are for certain applications, today’s readily available aluminum T-slot extrusion systems still require you to have some fabrication know-how. You likely need to cut, drill or mill, worry about fit, and possibly have to re-try to get to your desired structure, and you need to do all this accurately with tools and equipment that you may not have easy access to or fully know how to operate properly and safely,” the team writes. “UberBlox eliminates all that. You simply imagine a machine idea within the context of the UberBlox system, and you start assembling parts, mostly with a single small tool. You don’t need to have great fabrication skills or know about different types and ways to create joints.”

UberBlox is based on a Node-Bar construction method, collectively named “BLOX.” Nodes are UberBlox parts that represent the end of, or a connection point within, an UberBlox structure. Nodes come in a variety of forms depending on their use and function, with the most rudimentary being a six-sided one. These are spanned and connected using Bars of one or more UberBlox-Unit lengths, using UberBlox Connectors. The sides of a Node and Bar that are ready to accept connections each have a feature called an “UberBlox Interface,” or iface for short. A Connector plugs right into a Node or Bar’s iface and is locked in place using one to four of its embedded set-screws. All of these pieces are comprised of metal for strength, mostly aluminum, zinc-aluminum or steel alloys.

In order to enable flexibility in designing structures with UberBlox, the system boasts a variety of supporting components, such as sub-assemblies and modules, that can either be static, dynamic, or in some cases, fully-functioning. For those times when a structure requires more than just Nodes and Bars, UberBlox also permits the use of off-the-shelf parts to be incorporated on an as-needed basis.

“We believe the time is right to bring a sophisticated high-quality construction system and prototyping set, backed by great support and community engagement, to Makers of all levels,” explained UberBlox founder Alex Pirseyedi.

Indeed, the creative nature of the UberBlox concept makes the innovative system an ideal project for Kickstarter, where the team is currently seeking $100,000. Pending all goes to plan, delivery is expected to begin in November 2015. Whether you want a set of your own or to explore it in more detail, hurry over to its official campaign page here.

Nellie is a 3D-printed weed-picking robot

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This Arduino-powered bot may one day help farmers stay weed-free. 

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Other than shoveling several inches of snow, there’s one outdoor chore that anyone would surely welcome robotic assistance: weeding. While there are already a number of plowing bots out in existence today, thanks to one Maker, the daunting lawn care task may soon be taken care of as well.

A recent entry in MAKE: Magazine and Cornell University’s Pitch Your Prototype competition, Maker Mike Rigsby has developed a 3D-printed robot capable of, you guessed it, pulling out weeds! While at first this may sound like yet another mechanism to increase laziness, weeds are actually a serious problem for farmers all around the world — and it’s only getting worse. Take for instance Pigweed, which grows up to three inches per day and has become resistant to the dominant weed killers, threatening the nation’s soybean and corn crops.

“This is a serious attempt to address an agricultural problem,” Rigsby told the magazine. “I suspected that robots could handle the weeds and that the time to start working on such a solution is now, before the weeds develop further resistance to chemicals.”

And so Nellie was born. The robot spots and plucks them the old-fashioned way, one at a time. The current proof-of-concept is powered by a trio of Arduino Unos (ATmega328), a pair of Arduino motor shields, a Pixy camera, a Ping ultrasonic sensor, eleven AA NiMh batteries, a servo motor, a four-wheel drive base, along with some custom 3D-printed parts that were constructed using two AVR powered MakerBot Replicator 2.

How it works is relatively simple. The Pixy camera spots a weed, then feeds the data over to the Arduino processors which relay the commands to the motor controller module to activate the grabber and close the pincer. Meanwhile, the Arduino-controlled motor shield enables the robot to move about the land in the right direction. At the moment, the device is only designed to roll over carpet.

Should the Maker win the contest’s grand prize, however, Rigsby hopes to use the winnings to devise another working prototype with a little more oomph, which can navigate a farm’s terrain. And who knows, perhaps in the coming months, everyday gardeners will be able to take advantage of Nellie, too.

“To advance the project requires money for parts. Nellie’s daughters and sons will need a heavy duty chassis that will run between rows of plants, reaching to the side to eliminate offensive weeds. They need multiple cameras and better vision to pinpoint the target. Weeds will be eliminated by pulling, burning, cutting, digging, electrocuting or some combination of methods,” Rigsby adds.

Until then, you can watch it in action below. Now this would make for a great Hackay Prize entry as well. Just sayin’.

BoXZY is a triple-threat tool that brings an entire Makerspace to your desk

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BoXZY is an all-in-one CNC mill, laser engraver and 3D printer. 

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We’ve seen plenty of 3D printers. We’ve seen a number of CNC mills. We’ve seen countless laser engravers. Yet, a combination of all three is a much rarer sight. Developed by two brothers from Pittsburgh, Joel and Justin Johnson, their recently-revealed machine is shaping up to be a multi-purpose masterpiece that will appeal to both beginners and experienced Makers alike. The BoXZY has been developed to serve as a complete desktop manufacturing space, rather than just a 3D printer with some additional options.

“We refer to it as a desktop manufacturing space. While the system is user friendly, its capabilities are much more precise than consumer models currently on the market. But the key differentiator for BoXZY is its interchangeability,” the duo explains.

In essence, BoXZY is a dual-extruder FDM 3D printer that can be quickly interchanged with a solid 1¼ horsepower Makita router, transforming the machine into a powerful CNC mill or a laser etcher in a moments notice. Using these heads, any Maker can craft a block of aluminum, hardwood or plastic into more complex designs. The whole operation is housed inside a solid aluminum body, and assembled with stainless steel hardware to ensure its stability and durability throughout all applications.

Moreover, the triple-threat tool is designed to be completely modular and hackable — something Makers of any level will appreciate. To power up and create its four micron resolution, BoXZY drives all three axes with industrial ballscrews, which are firmly situated in its sleek, black anodized aluminum body.

As a CNC mill, BoXZY can handle intricate shapes in all kinds of materials. To get started, users simply pull off the magnetically coupled 3D print platform to expose the pre-drilled fixture plate and attach their spoil board, fixture plate or clamps. Additionally, BoXZY boasts a 2000mW laser engraver that slices through balsa and other thin woods eagerly, and will put finishing touches on hardwood, leather and plastic with incredible precision.

And when it comes to 3D printing, BoXZY is billed as a top-tier device as it complements its mill and laser perfectly. Indeed, Makers can easily and accurately print complex shapes with fine detail using a wide-range of filaments like PLA, ABS, PVA, Ninja-flex, ABS, and even nylon. All together, anyone can now devise shapes that would have otherwise been impossible from other forms of manufacturing.

What’s more, Makers can CNC mill, laser engrave and 3D print without ever leaving the control software. That’s because BoXZY utilizes a simple, intuitive interface that caters to everyone from novices to pros. For milling, BoXZY uses AutoDesk’s 123D toolpath generation, and can execute G-code created by most commercial CAM programs.

Interested? Head over to its Kickstarter campaign, where the duo is currently seeking $50,000. If all goes well, units will begin shipping in November 2015.

RenderBot is a DIY 3D printer with a focus on quality

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RenderBot is a high-quality, inexpensive and easy-to-build 3D printer for Makers of any level.

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It’s no secret that new, do-it-yourself 3D printers are a dime a dozen these days. Yet, it seems like a majority of these kits are designed with the goal of packing as many components into the machine as humanly possible, while still maintaining a low-cost and compact form factor. In reality, this leads to a device with limited capabilities and a number of malfunctioning parts, which ends up costing you a lot of more money in the long run. After experiencing the aforementioned problems first-hand with a variety of crowdfunding printers, one Springfield, Illinois startup has set out to change that trend with their RenderBot. This DIY 3D printer kit is not only inexpensive and easy-to-assemble, but more importantly, was created with superior quality in mind.

Tailored to both novice and advanced Makers alike, the RenderBot comes with a completely genuine, all-metal E3D hotend right from the start. This provides users with the durability and flexibility necessary to print with any plastic filament currently available. In addition, the printer is based on an RAMBo controller board (ATmega2560/ATmega32U2), which enables users to upgrade their printer at a later date should they want to add on non-essential components such as a heated bed, an LCD, a dual-extruder or an external temperature sensor.

“This printer is easy to assemble as well. With most printers, wires are difficult to work with. Once they are attached, you have to disassemble the entire machine to rework them. The motors on the RenderBot are all detachable from their wiring, which makes it incredibly easy to install them without having to worry where their wires go ahead of time. Once you are ready, you just plug one end into the motors and the other end into the controller board,” the team writes.

RenderBot is comprised of a sturdy steel frame in the form of two connected right triangles. This allows for the front of the printer to be relatively transparent and easily accessible for part retrieval and inspection. What’s more, users will never have to reach into the device or bend over to see the progress of a print.

• Printer size: 14.5″ x 16.5” x 17.5″ (422mm x 367mm x 448mm)
• Build volume: 10” x 10″ x 10″ (254mm x 254mm x 254mm)
• Layer resolution: 0.32mm – 0.2mm
• Print speed: Stable at 60mm/seconds (can go higher)
• Filament type: ABS, PLA, nylon, flexible, wood, ceramic, bronze, polycarbonate, HDPE, PVA (1.75mm)

Interested in a RenderBot for yourself? The printer currently comes in one of three different ways, either as a standard kit, an easy kit upgrade or fully-assembled. Head over to its official Kickstarter page here, where the team is currently seeking $65,000. Pending all goes to plan, shipment is slated to begin in June 2015. (And we’ll have to admit, between smashing objects and lighting things on fire, we couldn’t help but watch the entire crowdfunding video!)

This 3D-printed, Arduino-powered device can treat hypothermia

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A team of students has created a portable heated IV device for extreme climate situations and high-altitude climbers.

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Hypothermia is a serious danger to high-altitude climbers. When a patient suffering from hypothermia is brought to a hospital for medical assistance, a doctor typically begins treating the patient through the use of a heated IV. Injecting warm saline solution into the body raises the patient’s core temperature along with properly hydrating them. However, often times those suffering from hypothermia don’t have immediate access to medical assistance.

Cognizant of this, a team of students at NuVu Studio have created a portable heated IV for extreme climate situations and high-altitude climbers suffering from hypothermia, or dehydration for that matter. This product, which they call Backcountry IV, is not supposed to heal a person completely; instead, it is intended to serve as a temporary aid to prolong the user’s life until they can receive actual medical help.

The students were able to bring the idea to fruition, which resembles that of a mini flashlight and lantern, through the use of 3D printing. The device works by purifying water using a 3D-printed cap with built-in UV lights, which connects to another compartment containing ceramic resistors that heat the liquid between 104-106°F.  Once this is done, the water flows through the IV tubing until it reaches the needle that is clipped onto the specialized, 3D-printed cuff resting on a hiker’s forearm. The canister also holds several other necessary parts like a salt tablet and an infrared light vein finder.

“The importance of the product is clear — it could be the defying factor of a high altitude climber’s survival. Without the Portable Warm IV, a person could possibly die of hypothermia on the mountain but with the IV, the chance of his or her core body temperature warming enough to prolong the survival long enough to receive medical assistance is likely. There are no existing products that are capable of helping high altitude mountaineers let alone in extreme conditions return their body to a normal temperature. Since hypothermia is such a serious threat to the lives of mountaineers, it is crucial to have a device that would keep them alive at high altitudes and dangerously cold temperatures. The portable warm IV would bring the user fundamental and pragmatic medical attention immediately, making it a life-changing product… Literally,” the team writes.

The students constructed each part of this device using an ATmega2560 powered MakerGear 3D printer, with the exception of the actual IV and electronic panel, where the Arduino Micro (ATmega32U4) sits.

“This process began by simply hooking a 3.9 ohm resistor up to the Arduino and attaching the resistor up to the temperature sensor in order to read the heat that the resistor was giving off. Initially there was not enough power to make the resistor heat up to the optimal heat. Many alterations were then made over a span of three days. The result was four resistors soldered in series hooked up to an 11 volt lithium polymer battery. This battery provided the correct amount of power in order to heat the resistors up to the correct temperature.”

Interested in learning more? Check out the team’s entire build log here. This is just one of many Atmel based projects that are ‘making’ a difference in the world. Have a similar idea? Be sure to submit it for a chance to win The Hackaday Prize!

3D printing allows the blind to ‘see’ famous paintings

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The Museo del Prado has launched its first initiative focused on visually impaired visitors and based on innovation and 3D printing.

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Go to any museum throughout the world and you will surely find signs advising you “not to touch” any painting. However, a new installation inside Madrid’s Museo del Prado wants visitors to do anything but. In fact, visitors are encouraged to touch and experience a number of famous pieces. That’s because the museum has launched a first-of-its-kind project that is designed to give the blind (or those with limited visibility) an opportunity to create a mental image of artwork by merely feeling it.

The unusual exhibition, which is aptly dubbed “Touching the Prado,” is comprised of six replicated pieces from the museum’s famous collection, all of which were brought to life using 3D printing technology. These include Goya’s “The Parasol,” “A Still Life” by van der Hamen,“Apollo in the Forge of Vulcan” by Velázquez, “Noli Me Tangere,” and Correggio’s painting of Jesus meeting Mary Magdalene.

Now through June 28th, visually-impaired visitors will have the opportunity to obtain a heightened degree of artistic-aesthetic-creative enjoyment in order to explain, discuss and analyze displays in the Prado. Beyond the 3D images, the exhibit will include didactic material such as text in the form of braille, audio guides and opaque glasses aimed at facilitating the complete experience.

The idea that blind people should have the ability to experience 3D-printed copies of paintings, however, goes significantly beyond just these efforts to make art accessible. According to The New York Times, this latest installation is one of the most sophisticated yet with aspirations of unlocking the beauty of the visual arts for those unable to see them. Among other museums who’ve also sought to enable a tactile exhibits include The Metropolitan Museum of Art in New York, the National Gallery in London, The Louvre in Paris, Museo Nacional de San Carlos in Mexico City, and the Denver Art Museum.

Similarly, Spanish creative agency Lola and Pirate 3D launched a social experiment last year, which gave the blind the chance to literally touch their most candid memories and photographs through the use of 3D-printed, tactile printouts.

Interested in learning more about “Touching the Prado?” Head over to its official page here.

Scout is a 3D-printable, Flutter-based RC car

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This remote control car is screwless, wireless, and full of awesomeness. 

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Certainly not new to the Maker Movement, Taylor Alexander has spent a life of hacking and transfiguring electronics. At the early age of five, he would break objects down and rebuild them as something entirely different. This included taking parts from old cameras and stereos, then transforming them into electric cars.

Born out of his own frustration as to how difficult it was to wirelessly connect two Arduino boards, the Maker went on to invent Flutter, which not only gained enormous popularity among the DIY crowd but garnered just over $150,000 on Kickstarter back in 2013. The $36 wireless Arduino with a half-mile range lets users develop mesh networking protocols and connected devices in an efficient yet inexpensive manner.

As you can imagine, the processor is perfect for an assortment of applications, like robotics, consumer electronics, wireless sensor networks and educational platforms. Flutter is packed with a powerful Atmel | SMART SAM3S Cortex-M3 MCU, while an ATSHA204 crypto engine keeps it protected from digital intruders. This enables Makers to easily (and securely) build projects that communicate across a house, a neighborhood and beyond, as in the case of the 3D-printable remote control car named Scout.

Scout is an experimental vehicle that can be constructed by anyone using a 3D printer with at least 165mm of travel in one axis. The original prototypes were printed using an ATmega2560 based Ultimaker, a Maker-friendly machine which he highly recommends. Impressively, Scout doesn’t use any screws, and instead, simply snaps together using interlocking parts and clips. This allows the whole vehicle to be disassembled and reassembled in just a few minutes.

The current vehicle was crafted pretty quickly over the course of a few weekends as a mere proof-of-concept. What this means is that it admittedly comes with a few flaws, for the moment at least. However, the Maker does encourage his fellow Github community to share their input to help improve its design. Despite the flaws, which Alexander reveals below, the car is quite capable. So much so that it can even pull off 10-foot wheelies. How ‘bout that?!

“A short list [of flaws include]: The right angle mounting of the motor creates a week point with the bevel gears. The wheels are supposed to slip on, but using my printer they need to be hammered into place with a mallet. The steering requires a piece of bent piano wire, and should be replaced with a printed linkage. The body shell easily comes off, and so tape should be wrapped around the body of the system. There is no hole in the body shell for a power switch, so without modification the tape needs to be cut to toggle power. After agressive driving the motor gets hot and eventually wiggles in its mount,” he writes.

Aside from the Flutter wireless board, the project consists of eight 608 Skate bearings, a metal gear servo, a brushless quadcopter motor, a quadrotor propeller adapter, four toy car tires, and of course, some batteries and other electronic components. To see how Alexander put these pieces together, well you’ll have to head over to his Github page here. In the meantime, watch it in action below!

3D printing a working 5-speed manual Toyota transmission

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Maker 3D prints a fully-functional 5-speed transmission for a Toyota 22RE engine.

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You may recall a project from back in January when auto enthusiast Eric Harrell replicated a Toyota 22RE four-cylinder engine using a RepRap Prusa 3D printer. Not only did it aesthetically fit the bill, it was completely functional as well. Following such positive feedback from the DIY community and media coverage around his earlier design, Harrell decided to complement his creation by 3D printing a 5-speed manual transmission modeled after a W56 Toyota. Combined, the two components form an impressive piece of DIY machinery!

“This is the 4WD version of the transmission so it has a mounting surface to bolt a transfer case to. I’ll work to get a 2WD housing designed up, since the only difference is the rear section of the transmission. The transfer case will be the next thing I will upload,” the Maker writes.

The build took Harrell just over two days to finish, which was accomplished using his ATmega2560 powered Kossel Mini printer. Upon completion, the transmission worked — all 5 speeds and reverse. The project utilized a decent amount of 3mm rod and 623zz bearings, along with some screws and nuts given the tiny size of a few of the parts.

Interested? You can check out the entire project on Thingiverse here. Meanwhile, watch it in action below!

This drone attachment can save your life

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Ryptide is a drone accessory that can deliver an automatically-inflating life preserver to a swimmer in trouble in seconds.

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While the mere thought of drones still tends to conjure up negative images of things like spying and war, there are countless new ways that the unmanned apparatuses are being used to help improve our world, whether that’s combatiting wildlife pouching in Africa, monitoring bridge safety, transporting defibrillators, or better yet, saving you from drowning. The speed that drones can be deployed makes them ideal for delivering items in times of emergency, particularly those where every second counts.

That’s why a group of Connecticut high school students have launched a new project on Kickstarter, which can deliver life-rings to swimmers in distress by way of drones. As its name would suggest, Ryptide aspires to provide real-time aid to those who are pulled away from shore, as well as those who find themselves dangerously submerged in a frozen lake or pond. The solution consists of a small, lightweight accessory that can send an automatically-inflating life preserver to a swimmer in trouble in less than a minute. This simple mechanism can easily be attached to any drone and triggered via a RC transmitter, all while weighing less than the typical GoPro camera and gimbal commonly used by UAV operators.

The system itself was designed to carry a SOLAS (International Convention for the Safety of Life at Sea) approved life-ring approximately 24″ in diameter that uses a CO2 cartridge to instantly inflate upon contact with water. Once the drone is overhead, a button on its controller can be pressed to remotely release the life-ring. As soon as it hits the ocean, a CO2 cartridge dispenses its contents and the preserver fills with air in just five seconds. These lifelines are reusable and can be recharged using a kit available with the project.

While the basic version of the Ryptide affixes to most DJI Phantom series drones, the team has also devised a larger version of the system that is capable of carrying multiple life-rings and a small first person view (FPV) camera. The drop mechanism uses the same radio channel responsible for controlling a camera gimbal on a number of today’s most popular drones. As its creators reveal, if you fly a drone that can lug 450 grams, then you can operate one of their devices.

The more advanced models are powered by an 
Arduino Pro (ATmega328) tasked with dropping up to 
four life-rings using a single 
channel on a radio. Each press of the radio switch will drop a single ring. Additionally, Ryptide is comprised of 3D-printed parts, most notably a mounting platform that has been designed to accommodate all Phantom models. The team has included a kit that will adapt to a wider range of camera mounting systems for other drone types as well.

And when it’s not saving lives in the deep blue sea like David Hasselhoff, Ryptide can also be utilized to help rescue drones that find themselves in the water after an unintended landing. The recently-revealed system can be attached to most larger UAVs using looped webbing along with some heavy-duty zip ties that will keep them afloat should such misfortune occur.

Keep in mind, this mechanism isn’t meant to replace lifeguards altogether, but will help assist in time-sensitive missions. Ready to help them help others? Head over to its official Kickstarter page, where the team is currently seeking has successfully garnered $10,000. Shipment is slated to begin in July 2015, just in time to help save lives this summer. We can’t help but wonder if the team will submit this idea as an entry in The Hackaday Prize.