Author: Zoe Skyforest

3699 Articles

Electroluminescent Surfboard Looks Sharp For Night Surfing

January 1, 2024 by 5 Comments

If you’ve watched Point Break lately, you probably considered the thrill and elation involved in night surfing. If you’ve hung out with a lifeguard, though, you might instead have fretted over the dangers. In any case, it remains a popular pastime, and it’s all the more fun with a light-up surfboard like this one from [Moritz Sivers].

This project came about due to a local tradition for [Moritz], where people often surf at night to avoid the crowded breaks during the day. The build started from scratch, with a foam blank shaped into a compact  design optimized for riversurfing, with three fins set up in a thruster configuration. The back side of the board was given a coat of resin impregnated with glow-in-the-dark pigment such that the entire thing would emit an nice green glow, making it more visible at night. On the top surface, a pocket was cut in the board to host electronics for running an electroluminescent panel, complete with artwork inspired by 2001 – A Space Odyssey. The board was also outlined with EL wire to further improve the look.

[Moritz] has experimented with some neat LED surfboard designs before, too. Video after the break.

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Building A Simple Compressed Air Cannon Is Easy

January 1, 2024 by 33 Comments

The world of warfare was revolutionized by the development of black powder, fireworks, cannons, and the like. You don’t need any of that chemical nonsense to just have fun, though, as this compressed air cannon from [OtisLiu153] demonstrates.

The build uses PVC pipes for both the barrel and the air tank. In the case of the latter, avoiding over-pressurization is key to avoiding injury, though some will say you should simply never build a PVC pipe pressure vessel at all. In this case, [OtisLiu153] strictly recommends 150 psi as a limit, which is nicely within the 280 PSI rating of the 2″ Schedule 40 PVC being used. Though, as they note, the connections in the design aren’t necessarily up to the same rating.

Off-the-shelf couplings are used to piece everything together, with the twin-reservoir design also acting as a useful shoulder mount. Charging the cannon is done via a Schrader valve, as you might find on a bike’s inner tube, and firing is achieved via a ball valve.

Of course, if you build such an air cannon yourself, just be careful with your aim. Video after the break.

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Wii-Inspired Controller Built Using Raspberry Pi Pico

January 1, 2024 by 2 Comments

We all thought Nintendo was going to change the world of gaming when it released the Wii all those years ago. In the end, it was interesting but not really fundamentally life-changing for most of us. In any case, [Sebastian] and [Gabriel] decided to build a Wii-like controller for their microcontroller class at Cornell.

The build uses a pair of Raspberry Pi Pico microcontrollers, communicating over HC-05 Bluetooth modules. One Pico acts as a controller akin to a Wiimote, while the other runs a basic game and displays it on a screen via VGA output. The controller senses motion thanks to a MPU6050 inertial measurement unit, combining both gyros and accelerometers in all three axes.

The duo demonstrate the hardware by using it as a pointer to play a simple Tic-Tac-Toe game. It’s in no way going to light up the Steam charts, but the project page does go into plenty of useful detail on how everything was implemented. If you want to create your own motion gaming controller, you could do worse than reading up on their work.

We’ve seen some other great examples of motion controls put to good use, like this VR bowling game. Video after the break.

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Frog Boy Color Reimagines The Game Boy Color Hardware From The Ground Up

December 31, 2023 by 13 Comments

Sales figures suggest Nintendo did pretty well with the Game Boy Color during its original run, even if the hardware and visuals feel a tad archaic and limited today. [Chris Hackmann] has taken the Game Boy Color design and reworked it from the ground up as the Frog Boy Color, kitting it out with modern upgrades in a GBA-like form factor while retaining the original hardware underneath.

[Chris] went to the wide-style GBA layout for comfort, which he considers superior to the original rectangular Game Boy format. He iterated through over 50 3D-printed enclosure designs to get the design to work, ensuring that the final housing could be CNC machined. He then set out to trim down the original Game Boy Color circuit layout to cut out hardware he considered unnecessary. The original LCD driver could go, since the Q5 replacement LCD he intended to use didn’t need it, and he also considered the IR port to be surplus to requirements. He also set out to replace the original audio amp with his own stereo design.

The result is a wide-format Game Boy Color with a gorgeous modern LCD, USB-C charging, and excellent compatibility with original games and accessories. Files are on Github if you want to build one yourself. Of course, he’s not the only person working on building the best Game Boy ever, but we always love seeing new work in this space. Video after the break.

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Raspberry Pi Pico Becomes Emotionally-Aware Music Visualizer

December 31, 2023 by No comments

Back in the late 1990s and early 2000s, the nascent world of digital music was incredibly exciting. We all cultivated huge MP3 collections and spent hours staring at the best visualizers Winamp and Windows Media Player had to offer. [Rafael] and [Eric] decided to bring back those glory days with their music visualizer that runs on the Raspberry Pi Pico.

The design is quite interesting, going beyond the usual simplistic display of waveforms and spectrograms. Instead, the Pi Pico uses a Fast Fourier Transform analysis to determine the frequencies of the music, ideally then to determine the key, and thus the mood, of the tune.  Then, the visualizer uses different colors to represent those moods, such as green for happy music in a major key, or deeper blues for a sad piece in a minor key. The output of the visualizer is via Bruce Land’s 8-bit color VGA library, which allows the Pi Pico to drive a monitor directly.

Whether the visualizer really gets the music is up for debate.  The visuals simply don’t look sad and depressing enough when listening to Hallelujah, but maybe that’s just the lack of Jeff Buckley’s vocals in the instrumental. Furthermore, getting an FFT analysis to pull out reliable musical information from an audio recording is finicky to say the least. In any case, the blocky and colorful animations are nice to watch nonetheless. They’d make an excellent basis for visuals at your next underground chiptune show, that much is for certain. Video after the break.

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DIY Tube Lights Look Amazing For Just $50 A Piece

December 31, 2023 by 8 Comments

It’s the future. We should have weird glowy lights everywhere, all over our homes, cars, and businesses. In the automotive world, luxury automakers are doing their part with LED ambient lighting systems, but the rest of us have to step up. [Super Valid Designs] has developed an excellent modular DMX lighting rig that’s fit for this purpose; the rest of us just have to get to work and build our own!  (Video, embedded below.)

The design relies on hot-swapping powered bases that let a variety of different lights to be swapped in as needed. They use a custom four-pin socket designed by [Super Valid Designs] using PVC and ABS plumbing and conduit parts and tent pole springs from Home Depot. There’s a 3D-printable version, too, which is useful for those around the world that can’t get access to American standard gear easily. Anyone from the Nerf scene will understand this frustration well.

The real cool part of the modular rig, though, are the tube fixtures. There’s a ball design too, but they don’t look quite as future-cool as the tubes. They use fluorescent tube protectors as a cheap source of clear tubes, and use plumbing and conduit parts to make easy-insert connectors for pairing with the modular bases. Light is courtesy of old-school non-addressable RGB LED strips, attached to flat aluminium trim with their own adhesive combined with a wrap of clear packing tape as well. The LED strip is attached to one side of the tube, with parchment paper layered inside the tubes to act as a diffuser.

Building in quantities of 8 or more, [Super Valid Designs] reckons that the tubes can be built for $50 each or less. Of course, that adds up to a few hundred dollars in total, but the results speak for themselves.

If you’re thinking of tackling this project, but DMX is beyond your current skillset, fear not. We’ve got just the primer to get you started! Video after the break.

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Localizing Fireworks Launches With A Raspberry Pi

December 30, 2023 by 103 Comments

If you have multiple microphones in known locations, and can determine the time a sound arrives at each one, you can actually determine the location that sound is coming from. This technique is referred to as sound localization via time difference of arrival. [Kim Hendrikse] decided to put the technique to good use to track down the location of illicit fireworks launches.

The build is based on the Raspberry Pi, with [Kim] developing an “autonomous recording unit” complete with GPS module for determining their location and keeping everything time synchronized. By deploying a number of these units, spread out over some distance, it’s possible to localize loud sounds based on the time stamps they show up in the recording on each unit.

Early testing took place with an air horn and four recording units. [Kim] found that the technique works best for sounds made within the polygon.  Determining the location was achieved with a sound investigation tool called Raven Lite, developed by Cornell University. The process is very manual, involving hunting for peaks in sound files, but we’d love to see a version that automated comparing sound peaks across many disparate recording units. In any case, it worked incredibly well for [Kim] in practice. Later testing with friends and a network of six recorders spread over Limburg, Netherlands, [Kim] was later able to localize fireworks launches with an accuracy down to a few meters.

Similar techniques are used to locate gunshots, and can work well with pretty much any loud noise that’s heard over a great distance. If you’ve been using your hacker skills to do similar investigative work, don’t hesitate to let us know on the tipsline!