Tag Archives: DIY

DIY Lo-Fi Cassette Machine turns Bluetooth streaming into a living, analog kinetic sculpture

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This Lo-Fi Cassette Machine feels like something pulled straight from an alternate timeline—one where streaming never erased the tactile magic of analog media. It takes the quiet charm of a vintage cassette deck, stretches the tape into a kinetic sculpture, and fuses it with modern Bluetooth convenience to create an experience that’s as visual as it is sonic. The moment you see the exposed tape gliding across acrylic panels and the fluorescent VU tube pulsing to the beat, the build instantly recalls the nostalgic futurism that makes retro tech so irresistibly alive.

At its core, this DIY creation is more than a typical Bluetooth speaker. Julius Curt engineered a fully analog tape loop recorder and player with Bluetooth input, custom electronics, and a striking stainless-steel enclosure. Instead of playing streamed music directly, the device first records the Bluetooth audio onto a continuous loop of magnetic tape. The tape then travels through the playback mechanism before delivering sound through an integrated amplifier and speaker. This process infuses the music with the warm saturation, gentle hiss, and subtle pitch fluctuations that define lo-fi tape character, giving familiar digital tracks a tangible, analog soul.

Designer: Julius Makes

Magnetic tape formats, such as compact cassettes, once dominated personal audio, prized for their portability and DIY spirit. They faded from mainstream use as digital formats and streaming services rose to prominence. Yet, they have maintained a cult resurgence among audiophiles and makers who appreciate their physicality and imperfections. Curt’s project taps into this resurgence by exposing every moving part, turning what is usually hidden into the centerpiece of the experience.

The construction blends salvaged and custom components. An old cassette deck forms the foundation, but it is repurposed to drive a looped tape rather than a standard cassette reel system. Custom printed circuit boards designed in KiCad house the Bluetooth module, analog op-amps, and a TDA2030 amplifier, while a reclaimed cold-cathode fluorescent lamp serves as an analog VU meter that visually dances with the audio signal. The housing combines laser-cut acrylic, 3D-printed elements, and sheet-metal work, reflecting a high degree of craftsmanship.

Using the system is simple and engaging. After pairing a Bluetooth device and starting music playback, there is a brief delay—typically around three seconds—while the streamed signal is recorded onto the tape loop and then read back. Once the loop engages, listeners hear their chosen tracks transformed by the analog circuitry and tape path, complete with the characteristic warble and texture that tape enthusiasts seek out.

Beyond its technical novelty, the Lo-Fi Cassette Machine invites reflection on how we interact with sound. Modern streaming prioritizes clarity and convenience, often at the expense of emotional engagement with the medium. This one-off creation takes the opposite route with its unique approach, and that’s what I love.

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Timeless rotary phone reborn as modern AI-powered companion that plays music

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Who can forget the charm of rotary phones that were a lifeline in the early ’90s and ’80s? Their iconic mechanical dialling wheel with finger holes, solid build quality, and the unique clicking sound. Everything inside the machine was mechanical and wired on the inside to make communication possible. Even after their technical innovation was surpassed by mobile phones, the appeal of these robust dialers was not forgotten.

A recent re-imagining of this nostalgic device by designer Nico Tangara, who’s impressed us with the Self-Snoozing Alarm Clock shows how enduring designs can bridge analog heritage and modern digital convenience. Tangara’s project revives a vintage rotary telephone, carefully restoring original components while removing outdated elements such as the high-voltage bell and corroded wiring, to make space for low-voltage digital hardware.

Designer: Nico Tangara

At the heart of the redesign is the original rotary dial, preserved as the primary input mechanism. Rather than simply dialing phone numbers, each pulse created by turning the dial is translated into a digital signal. This allows the dial’s mechanical action to control contemporary digital functions. The transformed device blends vintage form with modern intelligence. On the inside, a small single-board computer, which was initially a Raspberry Pi 4, was later swapped for a Raspberry Pi 2 for lighter loads, handles the digital processing. The original speaker and microphone are replaced with improved audio components connected via a USB sound card, ensuring clearer playback and compatibility with the new system.

Beyond its physical transformation, the device gains new functionality: it operates as both a music player and an AI-powered voice interface. By integrating a voice-based model (e.g., ChatGPT), speech-to-text transcription (via Whisper), and text-to-speech output (via Google TTS), the retro telephone can respond to voice commands, play music, and offer interactive voice chat. Interestingly, it can do it all while preserving the tactile nostalgia of rotary dialing phones.

The project demonstrates how old objects can find new life when design respects their identity while embracing innovation. By retaining the rotary dial, handset cradle logic, and the device’s physical essence while embedding modern electronics, the hybrid telephone becomes more than a novelty. It becomes a functional link between eras, and I’m sure people will absolutely love the idea.

In doing so, the designer’s work suggests that the past need not be discarded. Instead, elements of design that once felt obsolete can offer fresh value when rethought for contemporary contexts. The resulting hybrid device stands as a tribute to the charm of mechanical telephony and an example of how thoughtful design can merge tradition with modern technology. Perhaps the ideal starting point for budding DIYers who want to create something out of the ordinary.

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Trace Line Clock Uses a Single Hand to Sketch Time as a Moving Line

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Clocks are one of the oldest design playgrounds, and yet most of us still live with the same two-hand layout we grew up with. Designers keep trying to find new ways to visualize time, sometimes at the cost of instant readability. The Trace Line Clock is a small desk piece that connects hours and minutes with a single, constantly changing line, turning the familiar dial into something that feels a little more like a drawing.

The Trace Line Clock is a minimal, 3D-printed desk clock by Hye-jin Park that uses one continuous hand to show both hours and minutes. The inner end of the line rides an inner circle for the hour, while the outer end rides an outer circle for the minute. As time passes, the line’s angle and length shift, so every glance shows a new geometric relationship between the two.

Designer: Hye-jin Park

The physical form is a white, wedge-like block that leans back slightly, with a circular recess on the front. Two concentric tracks are cut into that circle, and a single colored line spans between them. There are no numerals, logos, or extra markings, just the circles and the hand. It reads more like a small piece of graphic sculpture than a typical clock, especially on a clean desk.

The inner tip of the line points to the hour on the inner track, while the outer tip points to the minute on the outer track. It’s not as instant as glancing at a bold wall clock, but it’s also not inscrutable. With a moment’s attention, you can read it reasonably well, and the payoff is that you also get a little geometric drawing that changes every minute instead of just numbers.

Because the minute end moves faster than the hour end, the line is always stretching, shrinking, and rotating. The clock doesn’t just tick; it sketches. Checking the time becomes a small moment of noticing how the hand has reconfigured itself, not just a quick number grab. It’s the kind of object that rewards a second look rather than a drive-by glance at your phone or wrist.

The clock hides a standard movement and two internal hands behind the face, using magnets to couple them to the visible line. The front stays clean and uninterrupted, with the hand floating in the recess. The choice of a single accent color for the line against the white body keeps the focus on the changing geometry, not on branding or ornament that would clutter the composition.

The Trace Line Clock is not the tool you buy if you need to read the time from across the room in half a second. It’s a small, thoughtful piece for a desk or shelf where you don’t mind spending an extra beat to parse it. In return, it turns time into a quiet, evolving graphic that feels more like a living diagram than a static display.

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DIY Coffee Sand Table Turns a Living Room Surface Into Moving Art

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Most coffee tables are static slabs of wood, glass, or stone, maybe with a stack of books on top that never gets read. There’s a growing fascination with kinetic sand tables that draw patterns under glass, turning a surface into something alive. Arrakis 3.0 is a DIY coffee table that brings that idea into a more compact, furniture-friendly form you can actually live with in a normal apartment instead of a gallery.

Arrakis 3.0 is the latest iteration of Mark Rehorst’s sand table experiments, this time designed from the start as a practical coffee table. Under a standard 24-by-48-inch glass top, a steel ball slowly traces patterns in a bed of white sand, guided by a hidden mechanism. From above, all you see is a glowing sandbox under glass, constantly redrawing itself while your coffee sits on top.

Designer: Mark Rehorst

A blue anodized aluminum frame forms the table’s skeleton, supporting a black anodized sandbox that sits neatly inside it. The sand rests on a white base, so the patterns read clearly through the glass. A beveled glass top with a black border floats above, hiding the LEDs from direct view and making the whole thing read as a finished piece of furniture rather than a lab rig you’re still tweaking.

RGB LED strips tucked into the sandbox edges wash the sandbed in color, while additional strips under the frame cast a soft glow onto the floor. In a darkened room, the table becomes a low, luminous object, with the ball’s path slowly emerging and fading. The combination of blue frame, black sandbox, white sand, and colored light gives it a clear visual identity without feeling loud or desperate for attention.

Light blue mirrored acrylic panels fill the gaps in the frame, reflecting the LEDs and sandbed while hiding the mechanical guts. They’re centered in the slots with clear silicone edging, so they sit cleanly and don’t rattle. From the side, you see a band of soft reflection rather than belts and pulleys, which helps the table feel more like intentional furniture and less like an exposed machine.

The ball moves slowly enough that you don’t watch it like a screen, but you notice that the pattern is always changing when you glance down. Over the course of an evening, lines accumulate, overlap, and get erased as new designs start. It’s closer to having a mechanical fireplace or aquarium than a gadget, something that quietly animates the room without demanding attention every five seconds.

Arrakis 3.0 shows how DIY can cross into design territory. By tightening the footprint, standardizing the glass, and wrapping the mechanism in a coherent color and light story, this version feels less like a project and more like a piece you’d actually want to put your coffee on. The moving patterns and soft glow give it a presence that changes the room without overwhelming it.

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Nike Air Max 90 turned into fully playable SNES console is the ultimate retro-modern mashup

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Sneaker culture and gaming go a long way back, good enough reason we’ve seen many interesting collaborations that signify the retro-modern charm of reliving the golden era. The excitement of playing arcade titles that defined the ’80s and ’90s keeps the creative juices of inventive DIYers flowing. While having the superficial elements of gaming on a pair of sneakers is common, having an actual gaming console running right off your sneaker is worth the attention.

Designer Gustavo Bonzanini has come up with a unique way to celebrate the Super Nintendo’s 35th anniversary since its release in Japan. The one-off sneaker running the 16-bit SNES games is a homage to the 90s fashion and gaming technology. He calls them the AIR SNES since they are based on the Nike Air Max 90, which are as nostalgic as the arcade games we are all obsessed with. He positions them as comfort-laden classic runners that bring the thrill of 16-bit adventure.

Designer: Gustavo Bonzanini

The Singapore-based designer has a knack for creating unique wearable art from everyday shoes. This time, he’s hit the note right with the retro arcade vibe of gaming consoles of yesteryear. The idea for the build came from his Street Fighter II gaming streak, as he noticed Ryu launching fireballs from the device linked to the foot. Gustavo asked himself a question: why can’t a pair like the Nike Air Max 90 that looks like a video game double as a gaming console? Hence came the idea of designing sneaker shoes with built-in gaming capabilities. The best thing is that they are completely wearable, and you can play games right off them. The majority of the shoe remains the same, like the air cushioning system, but the magic happens right up at the tongue. The section is loaded with a Raspberry Pi Zero W tiny computer that’s no bigger than a business card.

It is paired with a small battery placed in the footbed, which provides 30 minutes of playtime. You can just plug it into an old school TV and play, since it has RCA output ports (instead of an HDMI output) to retain the classic feel. According to him, this was done, “to make the design feel like it could exist in 1990.” Of course, you need a controller to enjoy the games, so he had to tinker around with the regular SNES controller to get going. He modified the peripheral with a new internal for improved reliability and Bluetooth connectivity via the 8BitDo Mod Kit. That had to be done as the shoe’s contraption could not fit the input for the controller and would have added to the overall weight.

The AIR SNES can be used to play titles like Super Mario World or The Legend of Zelda: A Link to the Past via the microSD card slot, which is slotted inside the tongue. Gustavo has even gone the length to test the sneakers on the road and thereafter play games on them to make the build as authentic as possible. The final element comes in the form of a gray and purple palette of the sneakers, complemented by the light purple stitching along the seam to replicate the controller’s button layout. Unfortunately, these sneakers are not available to buy, and you’ll have to follow Gustavo’s build to create one for yourself.

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Dad Built a 4-Step Sequencer Synth Simple Enough for Age 3

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A father built a portable synthesizer for his daughter’s third birthday, and the result looks almost too polished to be a first electronics project. It’s a four-step sequencer with sliders instead of keys, designed so a toddler can make looping melodies just by moving colorful controls. The synth is as much a design and learning story as it is a music gadget, documenting what happens when someone jumps into hardware with no experience and a clear deadline.

The idea started with a Montessori activity board full of switches and LEDs. Watching his daughter twist knobs and flip switches reminded Alastair Roberts of a synth control panel, and he wondered if he could build a musical version. He had no prior hardware experience, which turned the project into an excuse to learn microcontrollers, CAD, PCB design, and 3D printing along the way, all while trying to finish before her birthday.

Designer: Alastair Roberts

The finished synth is a rounded square box in pink or white, with four vertical sliders in bright colors and four matching knobs at the corners. Slide up for higher notes, down for lower, while a tiny OLED screen shows a dancing panda. There are no menus or hidden modes, just a looping sequence that keeps playing while little hands experiment with pitch and tempo, creating simple melodies that shift and evolve with every adjustment.

Roberts started on a breadboard, then realized he needed a proper enclosure that his daughter could actually hold. Off-the-shelf cases were the wrong size and the wrong colors, so he opened Fusion 360 for the first time and slowly modeled a custom shell. A friend’s 3D printer turned those sketches into a real, toy-like enclosure that feels closer to a commercial product than a hack, complete with rounded corners and smooth edges.

The first hand-wired version worked but was fragile, with a nest of wires that broke when he closed the case. That pushed him to design his first printed circuit board, using Fusion’s electronics tools to lay out sliders, knobs, and connectors in a neat, single layer. The PCB not only made assembly faster, but it also gave the interior the same sense of order and intention as the exterior, no hidden messes or shortcuts.

Small design touches make it feel finished. A dedicated battery compartment with a removable cover, mounting posts that let the board screw down securely, and a raised bezel around the OLED so it sits flush with the top surface. The front panel carries his daughter’s name, Alma, turning the synth into something personal. It now lives on a shelf with her other toys and, according to him, gets regular use.

The synth works at two levels. For kids, it’s a fun, tactile way to poke at sound without needing lessons or screens. For adults, it’s a reminder that you can go from zero hardware experience to a polished, gift-worthy object by following curiosity and learning each tool as you need it. Whether or not it ever becomes a product, it’s already a successful piece of design for the one user who mattered most.

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YouTuber custom-builds coffee table with functional star system around an exploding sun

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Have you ever dreamed of sitting around the solar system? Modder at The 5439 Workshop on YouTube may have just made it possible with this new kind of solar system inside a coffee table. This is a cherry wood and aluminum coffee table with a precision cutout in the middle where a “mechanical orrery with both tilting orbits and an exploding star” finds refuge under a glass cover.

The modder refrains from calling this contraption a “particularly practical one,” but I stand to disagree. At the first given chance, I would put this guy in my living room without a thought and flaunt the celestial magnificence it beholds to just about anyone walking inside the main entrance.

Designer: The 5439 Workshop

If you don’t know much about 5439, the Swedish modder doesn’t have a massive following, that’s why. With only three published videos and a modest 5.6K followers, he is just starting out with robotics, and this coffee table is perhaps the “most mechanically complicated” – in his own words – thing he has designed and built. Before we get to the details of the star system, let’s get the other details of the table out of the way.

The table, as mentioned, is meticulously crafted from cherry wood. The wood is essentially chosen for its warm texture and its ability to reflect light at the right place. The two-layered table is nicely engineered by squaring the cherry wood planks – two of them, which are combined with three white boards to make up the tabletop. Once the top is created, a giant cutout is made in the middle, which, along with the glass top, creates a viewing window to the mechanical star system hidden below. The table sits on four robust pillars (legs) attached to a base frame.

After sanding and smoothing all the blemishes (after the glueing) in the top and the rough parts of the center cutout, the modder gets to creating the covering of the center hole with the sheet of glass and then gets to the bottom of the t where the celestial goodness is built. Visible through the glass viewport, this mechanical model of the planets dancing around the sun is not short of a feat.

The entire contraption of gears, bearings and motors finds an exploding sun at its center with the planets (in their usual) revolving around, happily on their own axis that of course, are elliptical and tilting to mimic the universe. The sun is notably a fist-sized sphere, built layer-by-layer using a selective laser sintering (SLS) printer with nylon powder, which splits open like the flower petals when it explodes.

Made of anodized aluminum parts, the star system features rings tilting at unexpected angles, making the planets move up and down on a single plane with the power of a nearly silent motor tucked into the table frame. The YouTube community seems to like what they see in the video demonstration (embedded above). The comment section is filled with positive feedback, including ideas where one commenter “suggests walling off the sides,” while the other recommends adding a “black run” underneath “to really make the mechanism pop.” What do you think?

 

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DIY 3D-Printed Clamshell Turns BOOX Palma Into a Tiny Laptop

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Palmtops and UMPCs are experiencing a quiet resurgence among people who want something more focused than a laptop and more tactile than a phone. Compact e-ink devices and tiny Bluetooth keyboards have become affordable building blocks for exactly this kind of project, letting makers combine them into pocketable machines tailored to writing, reading, or just tinkering. The result is a small but growing wave of DIY cyberdecks and writerdecks that feel like modern reinterpretations of classic Psion palmtops.

The Palm(a)top Computer v0 is one of those projects, born on Reddit when user CommonKingfisher decided to pair a BOOX Palma e-ink Android phone with a compact Bluetooth keyboard and a custom 3D-printed clamshell case. The result looks like a cross between a vintage Psion and a modern writerdeck, small enough to slide into a jacket pocket but functional enough to handle real writing and reading sessions on the go.

Designer: CommonKingfisher

The core hardware is straightforward. The BOOX Palma sits in the top half of the shell, while a CACOE Bluetooth mini keyboard occupies the bottom half. The keyboard was originally glued into a PU-leather folio, which the maker carefully peeled off using gentle heat from a hair dryer to expose the bare board. When opened, the two halves form a tiny laptop layout with the e-ink screen above and the keyboard below.

The clamshell itself is 3D-printed in a speckled filament that looks like stone, with two brass hinges along the spine giving it a slightly retro, handcrafted feel. Closed, it resembles a small hardback book with the Palma’s camera cutout visible on the back. Open, the recessed trays hold both the screen and keyboard flush, turning the whole thing into a surprisingly polished handheld computer, considering it’s a first prototype.

The typing experience is functional but not perfect. The maker describes it as “okay to type on once you get used to it,” and thumb typing “kinda works,” though it’s not ideal for either style. You can rest the device on your lap during a train ride and use it vertically like a book, with the Palma displaying an e-book and the keyboard ready for quick notes or annotations.

The build has a few issues that the maker plans to fix in the next version. It’s top-heavy, so it needs to lie flat or gain a kickstand or counterweight under the keyboard, possibly a DIY flat power bank. The hinge currently lacks friction and needs a hard stop around one hundred twenty degrees to keep the screen upright. There are also small cosmetic tweaks, like correcting the display frame width.

Palm(a)top Computer v0 shows how off-the-shelf parts and a 3D printer can turn a niche e-ink phone into a bespoke palmtop tailored to one person’s workflow. Most consumer gadgets arrive as sealed rectangles you can’t modify, but projects like this embrace iteration and imperfection. It’s less about having all the answers and more about building something personal that might inspire the next version.

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Someone Built a Working Synth From Cardboard and Walnut Keys

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Most synthesizers look and feel like appliances. They’re plastic boxes mass-produced in factories, efficient and functional but utterly lacking in personality or warmth. Pianos and guitars get to be handcrafted instruments with wood grain and visible joints, while synths are treated like glorified toasters with circuit boards inside. That disconnect between electronic music and tactile craft has always felt like a missed opportunity, especially when you consider how satisfying it is to play a real wooden keyboard.

One maker decided to fix this by building a fully functional synthesizer from scratch, using materials that sound completely impractical. The result is a compact, 34-key synth with a fiberglass-reinforced cardboard body, a steam-bent walnut frame, and individual keys handmade from oak and walnut. It looks like something between a vintage record player and a mid-century hi-fi component, with a turquoise fiberglass shell and warm wooden accents that feel more like furniture than electronics.

Designer: Gabriel Mejia-Estrella

The body starts as folded cardboard panels cut from a template, then gets layered with fiberglass cloth and epoxy until it transforms into a rigid, glossy shell. The process borrows from old automotive techniques where fiberglass shaped custom car bodies in the 1950s, giving the synth a retro-futuristic sheen. Around the perimeter sits a continuous steam-bent walnut strip with oval cutouts that mimic speaker grilles on vintage radios, adding visual warmth and a furniture-like presence.

The keys are where the craft really shows. Black keys are made from laminated walnut offcuts, while white keys are cut from oak for contrast and durability. Each key is individually shaped, drilled for a shared steel rod pivot, beveled to prevent jamming, then coated with fiberglass and sanded up to 3000 grit for a smooth finish. The result looks and feels closer to a piano than a typical plastic keyboard.

Underneath sits a custom flexible printed circuit with interdigitated copper pads and rubber dome switches. When you press a key, the dome collapses and bridges the pads, closing a circuit that a Teensy microcontroller scans continuously. The Teensy sends MIDI messages to a Raspberry Pi running Zynthian, an open-source synth platform packed with engines and presets, all displayed on a small touchscreen.

Of course, using cardboard and steam-bent walnut creates challenges the designer readily admits. Cardboard turned out to be impractical, requiring multiple fiberglass layers and tedious filling. Walnut is notoriously stubborn to bend, needing kerf cuts and boiling water to soften the fibers. The designer suggests foam board or 3D printing as easier alternatives and notes that more precise tools would have made the keys cleaner.

What makes this synth significant is how it challenges the assumption that electronic instruments have to be cold and industrial. By using wood, fiberglass, and visible handwork, it reintroduces warmth and personality into something usually purely functional. It’s less a finished product and more proof that synthesizers can be beautiful, tactile objects worth admiring even when silent.

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DIYer builds first 100% solar-powered drone that flies without batteries

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It’s not usual for DIYers to step up and experiment with the logic of solar-powered devices as we know it. The ideal generally is to keep it simple. Add solar panels, connect them to a battery system, and power the connected devices. But that’s way too straightforward for Luke Maximo Bell, who runs an eponymous YouTube Channel and already has a Guinness World Record to his credit.

Last year, Luke and his father challenged the record for the fastest drone from Red Bull with their 3D-printed drone. It not only officially surpassed the former’s top speed of 350km/h, but actually bettered it by nearly 50 percent, hitting high speeds of 500km/h (310mph). A record-breaking feat verified by the team at Guinness Book of World Records.

Designer: Luke Maximo Bell

The idea of this new solar-powered drone, based on an X-shaped frame, is not to shatter any records per se, but to experiment with the feasibility of a drone that runs completely on solar power, without any battery attachments. Of course, as you see it, a drone like that would practically have little real-world applications, but it could pave the way for more exploration, certainly. Maybe the kite festival of Jaipur, India, could see ropes tethered to kites mounted with solar panels on them someday.

Jokes apart, Luke as for years had this thought of, what if a drone could fly on solar power alone? And this project is “designed to find that out.” From the video demonstration, the drone looks like nothing more than a flying sheet of solar panels, but it has been successfully tested to fly, which is an achievement.

The idea of the drone is based on two parts, as Luke puts it, the drone itself (comprising antigravity motors residing on 3D printed mounts, propellers, and frame. And the second part being the photovoltaic panels. Both are combined to create this sun-loving drone that keeps airborne as long as the sun shines on it. The 18-inch X-frame of their unique drone is made of carbon fiber tubing, and it features the decisive flight controller installed right at the X intersection of the two frame bars holding the propellers at their ends.

Understandably, the entire contraption has taken Luke hours of jostling through the odds, check out the video above for more details; but he has been able to pull it off. With solar panels and no batteries on board, the drone does take off after a few nervous minutes on 100 percent solar power alone. The flight was a “bit shaky,” Luke says in the video, but it’s “flying,” and the testing was “successful,” he proudly notes.

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