With today’s technology, emulating video game consoles from the 90s or before is trivial. A Raspberry Pi and a controller of some sort is perhaps the easiest and simplest way to go to get this job done, but to really impress the masses some extra effort is required. This handheld from [Eli] called the Game Bub not only nails the appearance and feel of the first three generations of Nintendo handhelds but, thanks to its FPGA, can play not only ROMs but the original game cartridges as well.

As [Eli] notes, the FPGA is not strictly necessary for emulation, but does seem to be better at interfacing with physical hardware like controllers and game cartridges. For this task an Xilinx XC7A100T with integrated memory was chosen, with a custom PCB supporting the built-in controller, speaker, a rechargeable lithium battery, and a 480×320 display (that had to be rotated out of portrait mode). An SD Card reader is included for any ROM files, and there’s also a ESP32-S3 included to give the handheld WiFi and Bluetooth capabilities, with future plans to support the communications protocol used by the Game Boy Advance Wireless Adapter.

There are a few other features with the Game Bub as well, including the ability to use an authentic link cable to communicate with the original Game Boy and Game Boy Color, and a Switch-like dock that allows the Game Bub to be connected to an external monitor. It’s also open source, which makes it an even more impressive build. Presumably it doesn’t include the native ability to dump cartridges to ROM files but you don’t need much more than a link cable to do that if you need to build your ROM library.

Thanks to [Charles] for the tip!

Disappointing news this week for those longing for same-hour Amazon delivery as the retail giant tapped the brakes on its Prime Air drone deliveries. The pause is partially blamed on a December incident at the company’s Pendleton, Oregon test facility, where two MK30 delivery drones collided in midair during light rain conditions. A Bloomberg report states that the crash, which resulted in one of the drones catching fire on the ground, was due to a software error related to the weather. As a result, they decided to ground their entire fleet, which provides 60-minute delivery to test markets in Arizona and Texas, until a software update can be issued.

While we’ve always been skeptical about the practicality of drone delivery, it sure seems like Amazon is taking it seriously and making progress. There’s plenty of money to be made catering to the impatience of consumers and the general need for instant gratification, and where there’s potential for profit, technology is never far behind. So chances are good that someone will get this right, and with an infinite bucket of money and the ability to attract top talent, this is Amazon’s contest to lose. It is a bit alarming, though, that a little rain knocked these drones out of the air. We’d love to find out exactly what happened and how they plan to fix it.

Also in drone news, NATO has decided to deploy “drone boats” to help protect undersea cables and pipelines. A total of 20 uncrewed surface vehicles (USVs) will be deployed as part of Operation Baltic Sentry, which will include twelve crewed vessels and an unspecified number of patrol aircraft. The idea is to get eyes and ears on the infrastructure assets under the Baltic Sea, where a number of incidents have occurred over the last year or so, resulting in pipelines and undersea cables being damaged. That’s an understandable goal, but we’re keen on the USV itself. There’s not much information about them, and it’s not even clear which navy in the NATO bloc has these things. It’s also a little hard to tell how big they are, although our guess would be somewhere between a large patrol boat and a small cutter. We’d also like to know if these are remotely operated vessels or autonomous; again, our guess would be a mix of the two.

We got a tip this week about a post over on the Arduino forum with detailed instructions on making your own Dupont jumpers. There’s a link to a PDF with the pictorial guide, which shows exactly how to make these handy tools. Some people commented on this being a waste of time when you can buy jumpers on the cheap. But we’ve heard enough horror stories about those that rolling your own seems prudent. Plus we really liked the tips on crimping two leads into a single connector.

A few decades ago, there was a better-than-average chance that any band’s keyboardist was on mushrooms. Things have flipped, though, and now we’ve got shrooms on the keyboards. It comes to us from “Bionics and the Wire,” a Manchester, UK group that makes music with plants and mushrooms. There’s no detail on the equipment they use, but the business end of the instrument is a set of four solenoid-operated arms positioned over a keyboard. Electrodes are clipped to the caps of a couple of Wood Ear mushrooms, and whatever electrical signals they pick up are presumably passed to some amplifiers that figure out which notes to play. They claim the signals come from natural bioelectric activity in the fungi, but we suppose some of the signals may be coming from random electrical noise picked up by the mushrooms. Either way, the tune is pretty cool.

And finally, a while back we did a piece on electrical substations that took a look at all the cool stuff found in and around the big transformers that keep the grid running. One piece of gear that we read about but couldn’t find enough information on to include in the article was the Bucholz relay, a piece of protective gear that monitors the flow of dielectric oil inside these big transformers. Thankfully, the YouTube algorithm detected our frustration and suggested this cool video on how the Bucholz relay works. It’s remarkably simple, which is pretty much what you want for something that protects millions of dollars of irreplaceable infrastructure. The video also has a lot of nice details on the other bits and pieces inside a transformer. Enjoy!

As the electric vehicle takeover slowly lumbers along, marginally increasing efficiencies for certain applications while entrenching car-centric urban design even further, there are some knock-on effects that are benefiting people and infrastructure beyond simple transportation. Vehicle-to-grid technology has applications for providing energy from the car back to the grid for things like power outages or grid leveling. But [Technology Connections] is taking this logic one step further. Since a large number of EV owners have charging stations built into their garages, he wondered if these charging stations could be used for other tasks and built an electric heater which can use one for power.

This project uses a level 2 charger, capable of delivering many kilowatts of power to an EV over fairly standard 240V home wiring with a smart controller in between that and the car. Compared to a level 1 charger which can only trickle charge a car on a standard 120V outlet (in the US) or a DC fast charger which can provide a truly tremendous amount of energy in a very short time, these are a happy middle ground. So, while it’s true a homeowner could simply wire up another 240V outlet for this type of space heater or other similar application, this project uses the existing infrastructure of the home to avoid redundancies like that.

Of course this isn’t exactly plug-and-play. Car chargers communicate with vehicles to negotiate power capabilities with each other, so any appliance wanting to use one as a bulk electric supply needs to be able to perform this negotiation. To get the full power available in this case all that’s needed is a resistor connected to one of the signal wires, but this won’t work for all cases and could overload smaller charging stations. For that a more complex signalling method is needed, but since this was more of a proof-of-concept we’ll still call it a success. For those wanting to DIY the charger itself, building one from the ground up is fairly straightforward as well.

Thanks to [Billy] for the tip!

How do you know that your patch cables are good? For simple jumper wires, a multimeter is about all you need to know for sure. But things can get weird in the RF world, in which case you might want to keep these coaxial patch cable testing tips in mind.

Of course, no matter how high the frequency, the basics still apply, and [FesZ] points out in the video below that you can still get a lot of mileage out of the Mark 1 eyeball and a simple DMM. Visual inspection of the cable and terminations can reveal a lot, as can continuity measurements on both the inner and outer conductors. Checking for shorts between conductors is important, too. But just because the cable reads good at DC doesn’t mean that problems aren’t still lurking. That’s when [FesZ] recommends breaking out a vector network analyzer like the NanoVNA. This tool will allow you to measure the cable’s attenuation and return loss parameters across the frequency range over which the cable will be used.

For stubborn problems, or just for funsies, there’s also time-domain reflectometry, which can be done with a pulse generator and an oscilloscope to characterize impedance discontinuities in the cable. We’ve covered simple TDR measurement techniques before, but [FesZ] showed a neat trick called time-domain transformation, which uses VNA data to visualize the impedance profile of the whole cable assembly, including its terminations.