A wooden frame with 64 green LEDs running a Game of Life simulation

Wooden CNC Sculpture Displays Conway’s Game Of Life

August 24, 2023 by Robin Kearey 1 Comment

Conway’s Game of Life has been the object of fascination for computer hobbyists for decades. Watching the generations tick by is mesmerizing to watch, but programming the data structure and implementing the rules is also a rewarding experience, especially if you’re just getting acquainted with a new computing platform. Just as rewarding can be creating a nice piece of hardware to run the game on, as [SandwichRising] has just done: check out his beautiful wooden Game of Life implementation.

The main part of his Game is a piece of poplar wood that was CNC routed to produce an 8×8 display adorned with neat chain-like shapes. The display consists of standard 5 mm green LEDs, but they’re not the things you see poking out the front of the wooden frame. Instead, what you’re seeing are 64 lenses made out of epoxy. [SandwichRising] first covered the holes with tape, then poured green epoxy into each one and waited for it to harden. He then took off the tape and applied a drop of UV-cured epoxy on top to create a lens.

All the LEDs are mounted on PCB strips that are hooked up to a central bus going to the main ATmega328P microcontroller sitting on a separate piece of PCB. Whenever the system is powered on, the game is set to a random state determined by noise, after which the simulation begins. On such a small field it’s pretty common for the game to end up in a stable state or a regular oscillation, which is why the ATmega keeps track of the last few dozen states to determine if this has happened, and if so, reset the game to a random state again.

The source code, as well as .STL files for the PCBs and the frame, are available in the project’s GitHub repository. If woodworking isn’t your thing, there’s plenty of other ways to make neat Game of Life displays, such as inside an alarm clock, with lots of LEDS under a coffee table, or even with a giant flip-dot display.

Sharkskin Coating Reduces Airliner Fuel Use, Emissions

August 23, 2023 by Lewin Day 66 Comments

The aviation industry is always seeking advancements to improve efficiency and reduce carbon emissions. The former is due to the never-ending quest for profit, while the latter helps airlines maintain their social license to operate. Less cynically, more efficient technologies are better for the environment, too.

One of the latest innovations in this space is a new sharkskin-like film applied to airliners to help cut drag. Inspired by nature itself, it’s a surface treatment technology that mimics the unique characteristics of sharkskin to enhance aircraft efficiency. Even better, it’s already in commercial service! Continue reading “Sharkskin Coating Reduces Airliner Fuel Use, Emissions” →

2023 Cyberdeck Challenge: Modular Cyberdeck Creation Kit

August 22, 2023 by Brian McEvoy 3 Comments

We were fortunate to run into [Sp4m] at DEFCON31 and see his Modular Cyberdeck Creation Kit in person. In fact, he was wearing it around the hallways like a rogue decker in search of fellow runners. Holding the unit feels like a serious tool because of its weight, mainly from the battery. Everything hangs from a single-point sling on a metal handle, probably from the cabinetry aisle, and we could move silently and comfortably. The sling is firearm-rated, which is appropriate since he has a printed Weaver rail on top. It just needs a flashlight/laser combo.

[Sp4m] aims to create printable parts that combine any on-hand materials into a usable cyberdeck. In this iteration, he uses a wired Apple keyboard and trackpad he found in the trash, so we have to assume he works in IT. Most of the trackpad is covered, but enough is accessible to scroll and maneuver the mouse, saving almost six inches. The Steam deck is the current head but is removable so that this hardware collection can work for many USB-C tablets without fuss.

The eye-catching white/orange is no accident and may earn it a top spot in the Icebreaker category of the 2023 Cyberdeck Contest. The judges are currently deliberating, so keep an eye out for an announcement about the winners shortly.

Chaos And Camping

August 19, 2023 by Elliot Williams 14 Comments

In a field somewhere north of Berlin right now, around 5,500 hackers and their family members are blinking, coding, building, giving talks, and simply hanging out. Once every four years, the German hacker scene gathers and gets burned by the day star, despite the ample warnings to apply copious sunscreen.

CCCamp is a must-attend-it-to-get-it type event, but it’s also chock-full of talks on numerous stages, and these you can see from the comfort of your own home without even getting a mosquito bite! We loved [Harald Welte]’s complete guide to the mysterious world of eSIMS, for instance.

What’s most amazing about Camp, though, is that it brings together hackers of all ages and interests. Someone with a tape-measure direction-finding radio, probably participating in the foxhunt, just walked behind another group learning yoga. There is UV tape art and a stinky diesel train. Old greybeards mingle with kids, all playing with the bubble machines. Two folks are playing bocce with old hard drives. I think one camp was working on an autonomous model boat.

Everyone brings what they’re interested in, shares it, and helps anyone else get started if they’re interested. It’s a hacker paradise, even if just for a few days every four years.

Illustrated Kristina with an IBM Model M keyboard floating between her hands.

Keebin’ With Kristina: The One With The QWERTY Drum Set

August 15, 2023 by Kristina Panos 1 Comment

What does portability in a keyboard mean to you? For Hackaday’s own [Brian McEvoy], the image evokes that quintessential 80s instrument, the keytar.

But those left-hand keys aren’t just for show — they’re macro keys. It runs on an Adafruit Feather 32u4 Bluefruit, so [Brian] can forego the cord and rock out all over the room.

I love the construction of this keyboard, which you can plainly see from the side. It’s made up of extruded aluminum bars and 2 mm plywood, which is stacked up in layers and separated with little wooden donuts acting as spacers. Unfortunately, [Brian] accidentally made wiring much harder by putting the key switches and the microcontroller on different planes.

Although you could theoretically use any key switches for this build, [Brian] chose my personal and polarizing favorite, browns. If you’re going to use a travel keyboard, you’re probably going to be around people, so blues are probably not the best choice. With browns, you kind of have yourself a middle ground, best-of-both-worlds thing going on. The keycaps are among the best parts of this build, and it seems [Brian] chose them because the legends are on the sides, which makes it much easier to type on while wearing it. Kismet!

Continue reading “Keebin’ With Kristina: The One With The QWERTY Drum Set” →

Update Your Chinese Radio Without The Pain

August 13, 2023 by Jenny List 44 Comments

The new hotness in cheap radios this year has been the Quansheng UV-K5, a Chinese handheld transceiver with significant RF abilities and easy modding. The amateur radio community have seized upon it with glee and already reverse-engineered much of the firmware, but flashing the thing has always required a minor effort. Now thanks to the work of [whosmatt], it can be flashed with little more than a web browser and a serial cable.

This feat was made possible through the magic of WebSerial, a handy feature that allows web applications to talk to connected hardware. We’ve seen it in action a few times in the world of badges, and as browser support for it has improved it’s now available through browsers on all the major platforms.

The web app allows tweaking of the Quansheng settings and will, no doubt, be capable of uploading that when fully open-source firmware is available. It should be of great interest well beyond the world of Chinese radios, though, because we’re guessing there are a lot of projects that could benefit from such a ubiquitous interface tool.

If you’d like to know more, WebSerial is something we’ve looked at in the past.

Header image: [Concretedog]

Ku-Go: The World War II Death Ray

August 11, 2023 by Al Williams 66 Comments

Historians may note that World War II was the last great “movie war.” In those days, you could do many things that are impossible today, yet make for great movie drama. You can’t sneak a fleet of ships across the oceans anymore. Nor could you dig tunnels right under your captor’s nose. Another defining factor is that it doesn’t seem we seek out superweapons anymore.

A Churchill Bullshorn plough for clearning minefields — one of Hobart’s “Funnies”

Sure, we develop better planes, tanks, submarines, and guns. But we aren’t working on anything — that we know of — as revolutionary as a rocket, an atomic bomb, or even radar was back in the 1940s. The Germans worked on Wunderwaffe, including guided missiles, jets, suborbital rocket bombers, and a solar-powered space mirror to burn terrestrial targets. Everyone was working on a nuclear bomb, of course. The British had Hobart’s Funnies as well as less successful entries like the Panjandrum — a ten-foot rocket-driven wheel of explosives.

Death Ray

Perhaps the holy grail of all the super weapons — both realized and dreamed of was the “death ray.” Of course, Tesla claimed to have one that didn’t use rays, but particles, but no one ever successfully built one and there was debate if it would work. Tesla didn’t like the term death ray, partly because it wasn’t a ray at all, but also because it required a huge power plant and, therefore, wasn’t mobile. He envisioned it as a peacekeeping defensive weapon, rendering attacks so futile that no one would dare attempt them.

Continue reading “Ku-Go: The World War II Death Ray” →