IOT

The Dark Side Of Hacking XMas Lights, Literally

When looking at the piles of cheap RGB, Bluetooth-controlled LED strips you can find for sale just about anywhere these days, integrating them into a home-automation setup is very tempting. Normally these strips are controlled via a special smartphone app, that speaks whatever dodgy protocol was thrown together for the LED strip controller in question. Reverse-engineering this Bluetooth protocol is

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IOT

Neopixels? Try Liquid Nitrogen to Color Shift Your LEDs Instead

If you’re like us, you’ve never spent a second thinking about what happens when you dunk an ordinary LED into liquid nitrogen. That’s too bad because as it turns out, the results are pretty interesting and actually give us a little bit of a look at the quantum world. The LED fun that [Sebastian] over at Baltic Lab demonstrates in

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IOT

Pimp the Potentiometer

Sometimes, a hack isn’t really about the technology but about the logistics. If we asked you to light up an LED using an Arduino, there’s a good chance you’d know exactly how to do that. How about a bunch of LEDs? Simple. Now turn on LEDs proportional to an input voltage. A little harder, but nothing that you probably haven’t

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IOT

3D-Printed LED Wall Clock Does Lots With Little

This wall clock built by [Alf Müller] is lovely, using two NeoPixel rings to mark the time by casting light onto a 3D-printed ring. The blue shows the minutes, made more discrete by a grid inside the ring. The green shows the hours.  [Alf] has provided the code so you can rework the color scheme.  It might be interesting to

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IOT

Backyard LED Sculpture Inspired By Las Vegas Sphere

The Las Vegas Sphere is a large building. It stands 112 meters high and 157 meters wide, and is covered in a full 54,000 square meters of LED displays. That’s a little difficult to recreate at home for the typical maker. A scaled-down version is altogether more achievable though, as demonstrated by [DrZzs & GrZzs]. The Pixelhead Megasphere, as it

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IOT

A Nifty Tool For Counting Neopixels

Picture it. You’ve got a big roll of NeoPixels, but you have no idea how many are actually on the tape. Or you need to count how many WS2812B LEDs are in a display to properly plan your animations. Fear not, for [Gustavo Laureano] has built the perfect tool for counting the addressable LEDs. The tool is based on a

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IOT

A Tale Of Two LÄMPs

Building with LEDs is a hacker pastime like no other – what’s more, if you keep playing with LED tech out there, you’re bound to build something elegant and noteworthy. For today’s fix of beautiful LED devices, take a look at the two LÄMP creations of [Jana Marie], both LED projects building upon one another. It’s not just your regular

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IOT

Light Meets Movement with a Minimum of Parts

We often say that hardware hacking has never been easier, thanks in large part to low-cost modular components, powerful microcontrollers, and highly capable open source tools. But we can sometimes forget that what’s “easy” for the tinkerer that reads datasheets for fun isn’t always so straightforward for everyone else. Which is why it’s so refreshing to see projects like this

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IOT

Tricorder Tutorial isn’t Just for Starfleet Cadets

For many of us, the most difficult aspect of a project comes when it’s time to document the thing. Did you take enough pictures? Did you remember all the little details that it took to put it together? Should you explain those handful of oddball quirks, even though you’re probably the only person in the world that knows how to

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IOT

Clever Optics Make Clock’s Digits Float in Space

If you’ve never heard of Aerial Imaging by Retro-Reflection, or AIRR for short, you’re probably not the only one. It’s a technique developed by researchers at Utsunomiya University that uses beam splitters and retroreflective foil to create the illusion of an image floating freely in the air. [Moritz v. Sivers] has been experimenting with the technique to make — what

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IOT

Three Way LED Bulb Gives Up Its Secrets

You’ve probably seen three-way bulbs. You know, the ones that can go dim or bright with each turn of a switch. [Brian Dipert] wondered how the LED version of these works, and now that he tore one apart, you can find out, too. The old light bulbs were easy to figure out. They had two filaments, one brighter than the

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IOT

Sailing on a Sea of Seven-Segment Displays

The amount of information the humble seven-segment display can convey is surprising. There are the ten numerals, dead-ringers or reasonable approximations for about half the alphabet, and even a few not-quite-canonical symbols. But when you put 12,288 segments to work, you get all that and much more. Behold Sea of Segments, an art piece by [Will Gallia] that really pushes

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IOT

Pingo is an Analog Clock that uses Colors Instead of Hands

The purpose of a clock is to show the time, obviously. But if you’ve followed Hackaday for some time, you’ll know there are about a million different ways of achieving this. [illusionmanager] added yet another method in his Pingo Color Clock, which, as the name suggests, uses color as the main indicator. The clock’s face is divided into three concentric

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IOT

Homebrew Ball Drop Machine Rings in the New Year

The New Year’s Ball Drop in New York City stems from an old English naval tradition. These days, it’s more of a celebratory thing, and [Jon Gonzalez] wanted to bring a bit of that joy to his own celebrations. Thus enter the Ball-Drop-O-Matic 3000. The ball itself consists of two 3D printed halves assembled together with a linear bearing in

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IOT

Illuminate Your Benched Things with this Death Stranding Lamp

[Pinkman] creates a smart RGB table lamp based off of the “Odradek device” robot arm from the video game “Death Stranding”. [Pinkman] adds a XIAO BLE nRF52840 Sense device, with Bluetooth support, microphone and TinyML capability. The nRF52840 is used to push data to the five WS2812 strips, one for each “blade” of the lamp, and also connects to a

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IOT

LED Driver Circuit For Safety Hat Sucks Single AAA Cell Dry

[Petteri Aimonen] created an omnidirectional LED safety light to cling to his child’s winter hat in an effort to increase visibility during the dark winter months, but the design is also great example of how to use the Microchip MCP1640 — a regulated DC-DC step-up power supply that can run the LEDs off a single AAA cell. The chip also

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IOT

Spinning Holographic POV Christmas Tree of Death

[Sean Hodgins] really harnessed the holiday spirit to create his very own Giant Spinning Holographic Christmas Tree (of Death). It’s a three-dimensional persistence-of-vision (POV) masterpiece, but as a collection of rapidly spinning metal elements, it’s potentially quite dangerous as well. As [Sean] demonstrates, the system can display other images and animations well beyond the realm of mere holiday trees. Initial

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