Wizards Get Creative, Maybe Save The World

January 30, 2023 by 12 Comments

While it’s not normal Hackaday fare, we’ve covered the Dungeons & Dragons licensing kerfuffle, partially because we’re all nerds at heart, and also because it’s worrying that an Open Source styled license could be “deauthorized”. I did touch base with the Open Source Initiative, and got a telling comment that this issue was outside their purview, as the OGL 1.0a didn’t rise to the definition of an OSI approved license, and the update looked to be a disaster.

Since our coverage was published, Wizards of the Coast released part of the Fifth Edition System reference Document (SRD) under a Creative Commons license, removed the profit sharing language from the OGL update, but notably left the language in place about deauthorizing the 1.0a version of the license. As you can imagine, fans were still unamused, and we informed WotC of our displeasure when they launched a survey, asking fans their thoughts on the new license.

And the outpouring was overwhelming, with over 15,000 survey responses in just over a week. The vast majority (90% for some questions) informed WotC that they had lost their collective minds. That response, combined with a plummeting subscription count on DND Beyond, Paizo’s explosion of popularity and new ORC license announcement, and the plethora of publishers jumping ship, has finally shone the light of reason upon management at WotC.

The latest announcement is a win in basically every regard. The OGL 1.0a will not be deauthorized, and the entire 5e SRD has been released under the Creative Commons 4.0 By Attribution license. That’s an interesting choice, as CC-BY-4.0 is a very permissive license. It’s not “viral”, as it does not place any licensing restrictions on derivative works, and there are no restrictions on commercial use. The only restriction is that attribution must be included. The latest SRD is now available under both licenses, you pick your preference. So as a reward for going through the trauma, we get a sizable chunk of the game under an even less restrictive license. Bravo.

Continue reading “Wizards Get Creative, Maybe Save The World” →

Inside A 1940’s Spy Radio

January 30, 2023 by 18 Comments

The RCA CR-88 was a radio receiver made to work in top-secret government eavesdropping stations. As you might expect, these radios are top-of-the-line, performance-wise, at least when they are working correctly. [Mr. Carlson] has one on his bench, and we get to watch the show on his recent video that you can see below.

Interestingly, [Mr. Carlson] uses some Sherlock Holmes-like deductive reasoning to guess some things about the radio’s secret history. The radio’s design is decidedly heavy-duty, with a giant power transformer and many tubes, IF transformers, and large filter capacitors.

Continue reading “Inside A 1940’s Spy Radio” →

Surgery On An LED To Preserve Vintage Aesthetics

January 29, 2023 by 53 Comments

[Chris Jones] recently found himself in a pickle. An indicator LED off an old piece of stereo equipment had failed. It was a strange rectangular type for which he could source no modern substitute. Using a different LED would ruin the aesthetic. Thus, what else was [Chris] to do, but attempt surgery on an LED!

The first attempt was the simplest. [Chris] tried soldering a small SMD LED between the legs of the existing part, which was open circuit. It worked, but the light didn’t really propagate to the top of the LED’s plastic. It was too dim to do the job.

Unperturbed, [Chris] instead elected to cut the LED apart. he soldered the SMD LED to the original LED’s leads, inside its body this time. The top part of the plastic lens was then notched to fit snugly over the new SMD part. A bit of superglue then joined everything back together. The finished product looks a touch messy on the PCB. However, installed back inside the stereo, it’s a perfectly stealth fix that looks great.

Some will consider this fix frivolous and a waste of time. Others will appreciate the way it preserved the attractive retro look of a piece of vintage audio gear. In any case, we can all agree that modern LEDs are often a great replacement for older parts in many cases. If you’ve pulled off your own weird, oddball repair hacks, don’t hesitate to share us with them on the tipsline!

A wooden box sits on a darker wooden table. The box has a red, glowing number 8 on it.

Ambient Display Tells You If Borealis Is Coming To Town

January 29, 2023 by 8 Comments

For those times when you’d rather not get sucked down another internet rabbit hole when you really just wanted the weather, an ambient display can be great. [AlexanderK106] built a simple ambient display to know the probability the Northern Lights would visit his town.

Starting with a NodeMCU featuring the ESP8266, [AlexanderK106] walks us through a beginner-friendly tutorial on how to do everything from configure the Arduino IDE, the basics of using a breadboard. finding a data source and parsing it, and finally sticking everything into an enclosure.

The 7-segment display is taped and set into the back of the 1/4″ pine with enough brightness to shine through the additional layer of veneer on top. The display is set to show one digit and then the next before a three second repeat. A second display would probably make this easier to use day-to-day, but we appreciate him keeping it simple for this tutorial.

Looking for more ambient displays? Checkout the Tempescope or this clock that lets you feel the temperature outside!

Hackaday Links Column Banner

Hackaday Links: January 29, 2023

January 29, 2023 by 22 Comments

We’ve been told for ages that “the robots are coming for our jobs!” It’s true that we’ve seen robots capable of everything from burger flipping to bricklaying being demonstrated, and that’s certainly alarming for anyone employed in such trades. But now it looks like AI has set its sights set on the white-collar world, with the announcement that ChatGPT has managed a passing grade on a Wharton MBA exam.

For those not in the know, the University of Pennsylvania’s Wharton School of Business is in the major league of business schools; earning a Master’s in Business Administration from that august institution is no mean feat, and is likely to put the budding executive on a ballistic career trajectory. So the fact that ChatGPT could pass the exam is significant. But before you worry about a world in which our best and brightest business leaders are replaced with soulless automatons, relax. The exam presented to ChatGPT was just a final exam for one course, Operations Management, so it’s not like it aced everything an MBA is expected to know, and it took a lot of hints from a human helper to get it that far. It’s also reported that it made a lot of simple math mistakes, too, so maybe a Wharton MBA isn’t that much of a big deal after all.

Continue reading “Hackaday Links: January 29, 2023” →

Two "On Air" signs

Automatic On Air Light Prevents Distractions During Online Meetings

January 29, 2023 by 6 Comments

Remote working has become so normal that even important meetings are now routinely held online. But for those working from home there’s always the risk of pets or flatmates entering the room right when you’re in a heated argument with your boss or presenting your results to an important client. To overcome this problem, [Hans Scharler] designed a system that lights up a big “ON AIR” sign whenever he’s in an online meeting. Although his cat might still disregard it, any human housemates will now know not to disturb him.

The inside of an "On Air" sign with an ESP32 and an LED strip inside[Hans] built a similar device out of spare parts back in 2020, but completely redesigned it to make a more robust version. The basic idea is simple: the sign is illuminated whenever [Hans]’s webcam is enabled, as he is then presumably in a meeting. A few lines of Python code detect the webcam’s state and send the result to ThingSpeak, an IoT service that can be hooked up to various types of gadgets. In this case, the online service sends a signal to an ESP32 hidden inside the sign to turn on an LED string. Those LEDs consume very little power, so they can be driven directly from one of the ESP32’s GPIO ports.

The whole system is powered by a 5V USB power supply and can be placed on a shelf or mounted on a wall, giving your room a bit of a vintage radio studio vibe. Modern IoT services make this kind of project much easier than before: back in 2011, [Matt] probably had to write a lot more code to make a similar Arduino-powered light work.

Self-Watering Planters Reuse Household Jars

January 29, 2023 by 9 Comments

Self-watering planters are low-maintenance, and common DIY projects. What we like most about [Tommy]’s design is that it reuses empty jars to create self-watering planters. After all, jars are fantastic at reliably holding water, so why not put them to work? Incorporating jars as part of the design means fewer worries about leakage, but it also means less 3D printing is needed overall.

A wick (in this case, a piece of string) takes care of moving water from jar to the soil.

[Tommy]’s planter screws onto the threads of a jar’s neck. Getting water to the plant is helped by a small piece of string, which acts as a wick between the soil at the top and the water in the jar at the bottom. This design works best with small plants, but on the plus side there are no moving parts or other complexities. Got a 3D printer? Models for the planter are available here.

The biggest challenge for this design is that not all jar threads are alike, so planters made in this way are not completely interchangeable across all different types of jars. Fortunately, [Tommy] provides the OpenSCAD code he used to generate his design, which he created with the help of an industry guide on how to measure the finish (or threads) of jars and lids.

If you find yourself needing to further customize your own version to fit a particular container’s threads, there’s no need to start from scratch. Unsurprisingly, threads and lids are highly standardized so chances are there exists a calculator, tool, or existing model for exactly what you need.