Kritik sah

As per a recent Bambu Lab blog post , its FDM printers in the X1 series will soon receive a firmware update that adds mandatory authentication for certain operations, starting with the firmware update on January 23rd for the aforementioned FDM printers. These operations include performing firmware upgrades, initiating a print job (LAN or cloud), remote video access and adjusting parameters on the printer. Using the printer directly and starting prints from an SD card are not affected. As reasoning for this new feature Bambu Lab points to recent exploits that gave strangers access to people’s printers, though cheekily linking to an article on an Anycubic printer exploit. While admittedly a concern, this mostly affects internet-exposed printers, such as those that are tied into a ‘cloud’ account. Even so, LAN-based printing also falls under this new mandatory authentication system, with Bambu Lab offering a new tool called Bambu Connect for those who insist on using non-Bambu Lab bra...

[WhiskeyTangoHotel] wanted to build an LED clock after seeing some great designs online. They elected to go after a ring clock design, based around the ever-popular WS2812B addressable LEDs. The core of the build is the HELTEC WiFi 32 development board. It’s not one we’re intimately familiar with, but it’s based around the popular Expressif ESP32. Since it’s got WiFi, it’s able to simply dial up a network time server to always keep accurate time. It then drives a set of WS2812B LEDs set up in six rings. They display the current time with a layout akin to that of a typical analog clock. What makes this build just a little more fun is the inclusion of Disco Mode. At the press of a button, the full set of LEDs flashes out some fun dancing patterns. The clock is also programmed to trigger the same display for sixty seconds at the top of each hour. It’s a straightforward build—what might have been highly complicated to build two decades ago has been simplified with the magic of addressa...

Wolfenstein 3D  was a paradigm-shifting piece of software, using raycasting techniques to create a game with pseudo-3D graphics. Now, [izabera] has done something very similar, creating a raycasting display engine that runs entirely within bash. The work was developed with an eye cast over an existing raycasting tutorial online. As you might imagine, implementing these graphical techniques in a text console proved difficult. The biggest problem [izabera] encountered was that bash is slow. It’s not supposed to display full frames of moving content at 25+ fps. It’s supposed to display text. Making it display graphics by using tons of colorful characters is really pushing the limits. Bash also doesn’t have any ability to work with floating points, so all the calculations are done with massive integers. Other problems involved the limited ways to read the keyboard in bash, and keeping track of the display as a whole. It’s neat reading about how this was pulled off—specifically beca...

The old cable in place on the Samsung monitor. (Credit: MisterHW) Dumpster diving is one of those experiences that can net you some pretty cool gear for a reasonable price. Case in point the 24″ Samsung S24E650XW LCD monitor that [MisterHW] saved from being trashed. Apparently in very good condition with no visible external damage, the unit even powered up without issues. It seemed like a golden find until he got onto the Windows desktop and began to notice quaint red shimmering in darker areas and other issues that made it clear why the monitor had been tossed. Of course, the second best part about dumpster diving is seeing whether you can repair such issues . Prior to disassembly it had been noted that percussive maintenance and bending of the frame changed the symptoms, suggesting that something was a bit loose inside. After taking the back cover and shielded enclosure off, a quick visual inspection of the boards and cables quickly revealed the likely suspect: broken traces on ...

The Strandbeest is a walking machine, a creation of the celebrated artist Theo Jansen. They can look intimidating in their complexity, but it’s quite possible to build your own. In fact, if you’ve got a 3D-printer, it can be remarkably straightforward, as [Maker 101] demonstrates. The build relies on an Arduino Uno as the brains. It’s equipped with an L293D motor driver shield to run two DC gear motors which drive the walking assemblies. Power is courtesy of a 3-cell lithium-polymer battery. The chassis, legs, and joints are all 3D-printed, and rather attractively in complimentary colors, we might add. Controlling this little Strandbeest is simple. [Maker 101] gave the Arduino an infrared sensor which can pick up signals from a simple IR remote control. It can be driven backwards and forwards or turned left and right. What’s more, it looks particularly elegant as it walks—a hallmark of a good Strandbeest design. Design files are available online for the curious. We love a good Str...

Raspberry Pi’s new microcontroller, the RP2350, has a small section of memory that is meant for storing secrets. It’s protected by anti-glitching and other countermeasures, and the Raspberries wanted to test it. So this summer, they gave them out, pre-programmed with a secret string, as part of the badge for DEFCON attendees. The results of the cracking efforts are in , and it’s fair to say that the hackers have won. First place went to [Aedan Cullen], who also gave a great talk about how he did it at 38C3 . One of the coolest features of the RP2350, from a hacker perspective, is that it has dual ARM and dual RISC-V cores onboard, and they can be swapped out by multiplexers. The security module has a critical register that has disable bits for both of these processors, but it turns out that the ARM disable bits have priority. When [Aedan] glitched the security module just right, it disabled the ARM cores but left the RISC-V cores running in the secure context, with full debug(!), an...