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A student built a real anti-gravity machine… using an Arduino. How to Make an Acoustic Levitator: Arduino Nano + motor driver + about 60 ultrasonic transducers. They all emit ~40 kHz sound. The sound waves meet and form fixed pockets in the air. Tiny bits of styrofoam get stuck...

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Ilir Aliu

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816,437 просмотров • 3 месяцев назад •via X (Twitter)

Наука и технологии
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That’s insane! 🤯 A student built an acoustic levitation divide with an Arduino board. He built it using an Arduino Nano, a motor driver, and 60 ultrasonic transducers that can levitate low-density objects in place indefinitely. The transducers send out 40 kHz waves that create standing waves. The interference pattern produces nulls that trap objects. High-pressure areas form below and above the object, locking it in the low-pressure area between them. The transducers produce two sound waves moving in opposing directions at the same frequency and amplitude. The effect is that the low-pressure areas don't appear to move, like whipping a rope from both ends and having the wave meet in the middle. Sound waves are oscillating at high and low pressures. By creating a sound wave that doesn't move forward (a standing wave), you create areas of constant pressure. 🔉 Objects get trapped in the null points between high-pressure zones. The craziest part is that this was made more than 7 years ago! DIY levitation 😮‍💨 Reddit link: ~~ ♻️ Join the weekly robotics newsletter, and never miss any news →
0:16

That’s insane! 🤯 A student built an acoustic levitation divide with an Arduino board. He built it using an Arduino Nano, a motor driver, and 60 ultrasonic transducers that can levitate low-density objects in place indefinitely. The transducers send out 40 kHz waves that create standing waves. The interference pattern produces nulls that trap objects. High-pressure areas form below and above the object, locking it in the low-pressure area between them. The transducers produce two sound waves moving in opposing directions at the same frequency and amplitude. The effect is that the low-pressure areas don't appear to move, like whipping a rope from both ends and having the wave meet in the middle. Sound waves are oscillating at high and low pressures. By creating a sound wave that doesn't move forward (a standing wave), you create areas of constant pressure. 🔉 Objects get trapped in the null points between high-pressure zones. The craziest part is that this was made more than 7 years ago! DIY levitation 😮‍💨 Reddit link: ~~ ♻️ Join the weekly robotics newsletter, and never miss any news →

Lukas Ziegler

98,463 просмотров • 1 месяц назад

Arduino-based radar system is a smart project that detects your surroundings with sound waves. Usually it's done using an ultrasonic sensor and a servo motor.🛜
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Arduino-based radar system is a smart project that detects your surroundings with sound waves. Usually it's done using an ultrasonic sensor and a servo motor.🛜

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Someone built ultrasonic scanning on a tiny microcontroller and it’s seriously impressive Using Arduino, an ultrasonic sensor + a servo motor turns into a mini radar system: → scans surroundings in a sweep → detects objects in real time → measures distance with sound waves → builds a simple spatial map As the sensor rotates, it continuously emits ultrasonic pulses When those waves hit an object, they bounce back and the time delay is used to calculate distance That data is then plotted into a live radar-style visualization, just like what you’d see in real systems No expensive hardware No complex setup Just smart use of simple components. What makes it even cooler: → runs on a tiny microcontroller → low power, low cost → easy to build and customize → great intro to embedded systems + robotics This is the kind of project that shows: you don’t need massive compute to build something powerful Small device. Smart sensing. Real engineering
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Someone built ultrasonic scanning on a tiny microcontroller and it’s seriously impressive Using Arduino, an ultrasonic sensor + a servo motor turns into a mini radar system: → scans surroundings in a sweep → detects objects in real time → measures distance with sound waves → builds a simple spatial map As the sensor rotates, it continuously emits ultrasonic pulses When those waves hit an object, they bounce back and the time delay is used to calculate distance That data is then plotted into a live radar-style visualization, just like what you’d see in real systems No expensive hardware No complex setup Just smart use of simple components. What makes it even cooler: → runs on a tiny microcontroller → low power, low cost → easy to build and customize → great intro to embedded systems + robotics This is the kind of project that shows: you don’t need massive compute to build something powerful Small device. Smart sensing. Real engineering

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A game of shades : and an unbelievably delicate challenge. In ink painting, black actually comes in different “weights.” Painters change how thick, thin, dry, or wet the ink is to create depth and texture. Traditionally there are five main shades people talk about: burnt, dense, heavy, light, and clear. It’s all the same ink , just handled differently ,and that’s how they make a whole world of tones without using any color at all.
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A game of shades : and an unbelievably delicate challenge. In ink painting, black actually comes in different “weights.” Painters change how thick, thin, dry, or wet the ink is to create depth and texture. Traditionally there are five main shades people talk about: burnt, dense, heavy, light, and clear. It’s all the same ink , just handled differently ,and that’s how they make a whole world of tones without using any color at all.

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Hal Labs the type of company to take a 13-second sound clip of Dedede exploding, put it in an official soundtrack and name that shit "9.3 Billion in Anguish" simply because they can
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AI in robotics gets all the attention right now, but sometimes the most interesting work is very practical. Viet built a small vision system that counts potatoes on a conveyor belt. No giant dataset. No huge model. Just a clear problem and a smart setup. He used Ultralytics’ ObjectCounter, trained a tiny YOLO11 nano model, and because there was no potato dataset, he annotated a single frame with SAM 2 and trained from that. One frame. Still works across the whole video. It is a good reminder that useful AI in industry often looks like this. Focused. Lightweight. Solves a real task. If you work in manufacturing or robotics, these small systems are usually the fastest wins. They save time, reduce errors, and do not need massive infrastructure. Nice work, Viet. His projects: —- Weekly robotics and AI insights. Subscribe free:
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AI in robotics gets all the attention right now, but sometimes the most interesting work is very practical. Viet built a small vision system that counts potatoes on a conveyor belt. No giant dataset. No huge model. Just a clear problem and a smart setup. He used Ultralytics’ ObjectCounter, trained a tiny YOLO11 nano model, and because there was no potato dataset, he annotated a single frame with SAM 2 and trained from that. One frame. Still works across the whole video. It is a good reminder that useful AI in industry often looks like this. Focused. Lightweight. Solves a real task. If you work in manufacturing or robotics, these small systems are usually the fastest wins. They save time, reduce errors, and do not need massive infrastructure. Nice work, Viet. His projects: —- Weekly robotics and AI insights. Subscribe free:

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These birds have an instinct to collect paper stripes and put them in their tail because in the wild they use any material they can get to build their nests. This lingers on in pet birds. And this one teaches a young bird how to do it.
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These birds have an instinct to collect paper stripes and put them in their tail because in the wild they use any material they can get to build their nests. This lingers on in pet birds. And this one teaches a young bird how to do it.

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The Basics of Electromagnetic Waves: Electricity and magnetism can sit still, like static electricity in your hair or a magnet stuck to your fridge. But when they move and change, they actually create each other. Together, they team up to form invisible ripples of energy called electromagnetic waves. Unlike ocean waves or sound waves, which need water or air to ripple through, electromagnetic waves don't need any material at all. They can easily travel through the completely empty vacuum of space. Maxwell's Big Idea: In the 1860s and 1870s, a Scottish scientist named James Clerk Maxwell figured out how this works. He wrote down the math showing exactly how electricity and magnetism link together to make these travelling waves. Today, scientists call his famous rules Maxwell's Equations. Hertz Proves It: Later, a German physicist named Heinrich Hertz took Maxwell's ideas and brought them to life. He was the first person to actually create and catch radio waves. To honour his work, we use the word hertz to measure how fast a wave vibrates (one cycle per second). Hertz's experiments proved two massive ideas: Radio waves are just invisible light: He showed that radio waves travel at the exact same speed as light, proving that they are actually a form of light we just can't see. Going wireless: He finally figured out how to detach these energy fields from physical wires, allowing the waves to fly freely through the air exactly as Maxwell had predicted.

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"Explosion in Kharkiv" or something along those lines is the most frequent post I make. I've probably made a thousand of them by now, if not more. Air raid alerts are so frequent here that I usually don't even post about them. They can last for days, and the citizens of Kharkiv are forced to disregard them. Or we can have twelve of them in a day, and we will also be forced to disregard them. I often see online how central or western Ukraine complains about the alerts, and oh, how much I would give to have an actual solid warning about an attack like them. But "explosions in Kharkiv" always arrive unexpectedly. How surreal it is that we are forced to live like this. How horrific it is that thousands of bombs, missiles, and drones fall on a major city in Europe daily, and all the major press and political figures just pretend it doesn't happen. Because if they admit that it happens and they just watch it year after year, then what kind of people are they? Do they care at all?

Kate from Kharkiv

23,789 просмотров • 1 год назад

BREAKING: Another video of the Serbian police using a LRAD sonic cannon against the student protesters in Belgrade while they were holding their 15 minutes of silence. LRAD is an acoustic weapon that fires a targeted "beam" of sound at very high volume, up to 160 dB 🇷🇸
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BREAKING: Another video of the Serbian police using a LRAD sonic cannon against the student protesters in Belgrade while they were holding their 15 minutes of silence. LRAD is an acoustic weapon that fires a targeted "beam" of sound at very high volume, up to 160 dB 🇷🇸

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Leftists Try To Instigate ICE Agents In Maine - 1/21/26 During detainment, a handful of anti-ICE confront immigration enforcement. They demand to see the warrant and demand them to answer. These fools get ignored and instead an agent just films them back silently. Without instigators on the Left, there would no problems.

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Found out about TinkerCad yesterday night and decided to build a Blinking LED Circuit using the Arduino Uno R3. This is actually cool cause I can prototype things before getting them physically. The code passing info from the micro-controller to the LED bulbs was intuitively easy to write. Ordering my Arduino Uno R3 Kit today, can't wait for it to arrive so that I can put this into action for real!

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The last lineout is all you need to know about England. 5 points down, 10 seconds left on the clock and they don’t even get a man in the air An 8 year old could have told you where the Italians were gonna throw it They don’t contest the maul either. Just stand there and watch

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