How The Widget Revolutionized Canned Beer

Walk into any pub and order a pint of Guinness, and you’ll witness a mesmerizing ritual. The bartender pulls the tap, fills the glass two-thirds full, then sets it aside to settle before topping it off with that iconic creamy head. But crack open a can of Guinness at home, and something magical happens without any theatrical waiting period. Pour it out, and you get that same cascading foam effect that made the beer famous.

But how is it done? It’s all thanks to a tiny little device that is affectionately known as The Widget.

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Hacking The Bluetooth-Enabled Anker Prime Power Bank

Selling power banks these days isn’t easy, as you can only stretch the reasonable limits of capacity and output wattage so far. Fortunately there is now a new game in town, with ‘smart’ power banks, like the Anker one that [Aaron Christophel] recently purchased for reverse-engineering. It features Bluetooth (BLE), a ‘smart app’ and a rather fancy screen on the front with quite a bit of information. This also means that there’s a lot to hack here beyond basic battery management system (BMS) features.

As detailed on the GitHub project page, after you get past the glue-and-plastic-clip top, you will find inside a PCB with a GD32F303 MCU, a Telink TLSR8253 BLE IC and the 240×240 ST7789 LCD in addition to a few other ICs to handle BMS functions, RTC and such. Before firmware version 1.6.2 you can simply overwrite the firmware, but Anker added a signature check to later firmware updates.

The BLE feature is used to communicate with the Anker app, which the official product page advertises as being good for real-time stats, smart charging and finding the power bank by making a loud noise. [Aaron] already reverse-engineered the protocol and offers his own alternative on the project page. Naturally updating the firmware is usually also done via BLE.

Although the BLE and mobile app feature is decidedly a gimmick, hacking it could allow for some interesting UPS-like and other features. We just hope that battery safety features aren’t defined solely in software, lest these power banks can be compromised with a nefarious or improper firmware update.

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Steampunk Copper PC Is As Cool As It Runs

Copper! The only thing it does better than conduct heat is conduct a great steampunk vibe. [Billet Labs]’ latest video is an artfully done wall PC that makes full use of both of those properties.

The parts are what you’d expect in a high-end workstation PC: a Ryzen 9 and an 3090Ti with oodles of RAM. It’s the cooling loop where all the magic happens: from the copper block on the CPU, to the plumbing fixtures that give the whole thing a beautiful brewery-chiq shine when polished up. Hopefully the water-block in the GPU is equally cupriferous too, but given the attention to detail in the rest of the build, we cannot imagine [Billet Labs] making such a rookie mistake as to invite Mr. Galvanic Corrosion to the party.

There’s almost no visible plastic or paint; the GPU and PSU are hidden by a brass plates, and even the back panel everything mounts to is shiny metal. Even the fans on the radiator are metal, and customized to look like a quad throttle body or four-barreled carburetor on an old race car. (Though they sound more like a jet takeoff.)

The analog gauges are a particular treat, which push this build firmly into “steampunk” territory. Unfortunately the temperature gauge glued onto the GPU only measures the external temperature of the GPU, not the temperature at the die or even the water-block. On the other hand, given how well this cooling setup seems to work later in the video, GPU temps are likely to stay pretty stable. The other gauges do exactly what you’d expect, measuring the pressure and temperature of the water in the coolant loop and voltage on the twelve volt rail.

Honestly, once it gets mounted on the wall, this build looks more like an art piece than any kind of computer— only the power and I/O cables do anything to give the game away. Now that he has the case, perhaps some artful peripherals are in order?

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