Author: Tom Nardi

2463 Articles

Sniffing Around Inside A ThinkPad Battery

December 4, 2024 by 24 Comments

For most people, a battery pack that’s misbehaving simply means it’s time to get a new battery. But when the battery in their ThinkPad wasn’t able to muster up more than 20 minutes of runtime, [Shrinath Nimare] saw an opportunity to dig deeper and do a bit of investigating.

The problem seemed to be that the battery pack was reporting that it was 100% charged at just 11.7 V instead of the correct 12.3 V. As it turns out, that 11.7 V figure is only slightly above what the battery should be when its run flat — so in reality, the battery was never actually getting a charge and would report that it was dead after just a few minutes of use. But why?

With a logic analyzer attached to the pins of the battery, [Shrinath] set out to sniff its communications with the ThinkPad.  Even if it wouldn’t lead to fixing the battery pack, the information obtained would potentially be useful for other projects, such as creating a custom high-capacity LiFePO4 pack down the line.

Continue reading “Sniffing Around Inside A ThinkPad Battery” →

OSHW Battery Tester Aims To Help Tame Lithium Cells

December 3, 2024 by 13 Comments

It’s no exaggeration to say that the development of cheap rechargeable lithium-ion batteries has changed the world. Enabling everything from smartphones to electric cars, their ability to pack an incredible amount of energy into a lightweight package has been absolutely transformative over the last several decades. But like all technologies, there are downsides to consider — specifically, the need for careful monitoring during charging and discharging.

As hardware hackers, we naturally want to harness this technology for our own purposes. But many are uncomfortable about dealing with these high-powered batteries, especially when they’ve been salvaged or come from some otherwise questionable origin. Which is precisely what the Smart Multipurpose Battery Tester from [Open Green Energy] is hoping to address.

Continue reading “OSHW Battery Tester Aims To Help Tame Lithium Cells” →

FREE-WILi Turns DC32 Badge Into Hardware Dev Tool

November 21, 2024 by 14 Comments

With few exceptions, electronic event badges are often all but forgotten as soon as the attendee gets back home. They’re a fun novelty for the two or three days they’re expected to be worn, but after that, they end up getting tossed in a drawer (or worse.) As you might imagine, this can be a somewhat depressing thought thought for the folks who design and build these badges.

But thanks to a new firmware released by the FREE-WILi project, at least one badge is going to get a shot at having a second life. When loaded onto the RP2350-powered DEF CON 32 badge, the device is turned into a handy hardware hacking multi-tool. By navigating through a graphical interface, users will be able to control the badge’s GPIO pins, communicate over I2C, receive and transmit via infrared, and more. We’re particularly interested in the project’s claims that the combination of their firmware and the DC32 badge create an ideal platform for testing and debugging Simple Add-Ons (SAOs).

Continue reading “FREE-WILi Turns DC32 Badge Into Hardware Dev Tool” →

Measuring The Mighty Roar Of SpaceX’s Starship Rocket

November 21, 2024 by 46 Comments

SpaceX’s Starship is the most powerful launch system ever built, dwarfing even the mighty Saturn V both in terms of mass and total thrust. The scale of the vehicle is such that concerns have been raised about the impact each launch of the megarocket may have on the local environment. Which is why a team from Brigham Young University measured the sound produced during Starship’s fifth test flight and compared it to other launch vehicles.

Published in JASA Express Letters, the paper explains the team’s methodology for measuring the sound of a Starship launch at distances ranging from 10 to 35 kilometers (6 to 22 miles). Interestingly, measurements were also made of the Super Heavy booster as it returned to the launch pad and was ultimately caught — which included several sonic booms as well as the sound of the engines during the landing maneuver.

Continue reading “Measuring The Mighty Roar Of SpaceX’s Starship Rocket” →

With Core ONE, Prusa’s Open Source Hardware Dream Quietly Dies

November 20, 2024 by 151 Comments

Yesterday, Prusa Research officially unveiled their next printer, the Core ONE. Going over the features and capabilities of this new machine, it’s clear that Prusa has kept a close eye on the rapidly changing desktop 3D printer market and designed a machine to better position themselves within a field of increasingly capable machines from other manufacturers.

While some saw the incremental upgrades of the i3 MK4 as being too conservative, the Core ONE ticks all the boxes of what today’s consumer is looking for — namely high-speed CoreXY movement with a fully enclosed chamber — while still offering the build quality, upgradability, and support that the company has built its reputation on. Put simply it’s one of the most exciting products they’ve introduced in a long time, and exactly the kind of machine that many Prusa fans have been waiting for.

Unfortunately, there’s one feature that’s ominously absent from the Core ONE announcement post. It’s easy to overlook, and indeed, most consumers probably won’t even know it’s missing. But for those of us who are concerned with such matters, it’s an unspoken confirmation that an era has finally come to an end.

With the Core ONE, Prusa Research is no longer in the business of making open source 3D printer hardware, but that doesn’t mean that the printer isn’t hackable. It’s complicated, so read on.

Continue reading “With Core ONE, Prusa’s Open Source Hardware Dream Quietly Dies” →

The Vecdec Cyberdeck Is More Than A Pretty Case

November 19, 2024 by 30 Comments

A common criticism we hear of cyberdecks is that functionality too often takes a backseat to aesthetics — in other words, they might look awesome, but they aren’t the kind of thing you’re likely to use a daily driver. It’s not an assessment that we necessarily disagree with, though we also don’t hold it against anyone if they’re more interested in honing their build’s retro-futuristic looks than its computational potential.

That said, when a build comes along that manages to strike a balance between style and function, we certainly take notice. The vecdec, built by [svenscore] is a perfect example. We actually came across this one in the Desert of the Real, also known as the outskirts of Philadelphia, while we stalked the chillout room at JawnCon 0x1. When everyone else in the room is using a gleaming MacBook or a beat-up ThinkPad, its wildly unconventional design certainly grabs your attention. But spend a bit of time checking the hardware out and chatting with its creator, and you realize it’s not just some cyberpunk prop.

Continue reading “The Vecdec Cyberdeck Is More Than A Pretty Case” →

Spotted At Supercon: Glowtape Wearable Display

November 16, 2024 by 14 Comments

We’re big fans of unusual timepieces here at Hackaday, so it didn’t take long before somebody called our attention to the gloriously luminescent watch that [Henner Zeller] was wearing at this year’s Supercon.

He calls it the Glowtape, and it uses a dense array of UV LEDs and a long strip of glow-in-the-dark material to display the time and date, as well as images and long strings of text written out horizontally to create an impromptu banner. It looked phenomenal in person, with the energized areas on the tape glowing brightly during the evening festivities in the alleyway.

Continue reading “Spotted At Supercon: Glowtape Wearable Display” →