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Open Hardware: Weekly GNU-like Mobile Linux Update, RISC-V, and More
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Linux On Mobile ☛ 2026-08-08 [Older] Weekly GNU-like Mobile Linux Update (32/2026): Sensor Bonanza
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Hackaday ☛ Laser Layers For (Almost) Isotropicly Strong Prints
What the lasers are doing is a very simple idea: they’re pre-melting the last-laid-down-layer just under the nozzle so that molten plastic is meeting molten plastic to create a much stronger joint than you get when you extrude onto an already-cold layer. The second layer keeps the hotspot warmer longer, which also helps the bond. The resulting parts are not purely isotropic, but he’s getting breaking strain along the z-axis of ABS that’s up to 94% of what he’s measuring in the x direction, while PLA still rates at 77.9%. That’s compared to 60% and 41%, for un-lasered samples, respectively. If you watch the video, you’ll get all the details for the printing process and can see more test data.
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Hackaday ☛ Building An Actuator For A Walking Robot
[Food for Robots] is building a walking robot, so he needed a compact, lightweight, and backdrivable actuator capable of producing 20 Newton-meters of torque. He’d previously built a largely 3D-printed actuator, but when he tried to exceed 10 Nm of torque with it, various parts kept breaking. He therefore machined the second iteration out of aluminum; since it didn’t need to be 3D printed, he switched from a Capstan drive to a planetary gearbox. The gearbox sits in the center of the actuator, inside the stator, and uses several stacked layers of gears to increase strength within the limits of a small CNC.
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Hackaday ☛ Researchers Hack An Airline Analog
Modern aircraft typically use the ARINC 429 protocol. This differs from many protocols we see where multiple transmitters are allowed. ARINC 429 has a single transmission source. This makes a transmission-override attack hypothetically difficult, as an attacker was thought to need to physically replace a legitimate transmitter (like a flight management computer), a rather daunting task. However, the ARINC 429 transmitters sit behind a pair of 37.5 ohm resistors, so by transmitting on the same line, an attack device can simply override the legitimate transmitter’s power.
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RV Embedded ☛ A Third World Embedded Engineer Responds to "RISC-V: They Should Have Known Better"
The students I want to teach are in the same position, and so are the ones in Nigeria and Bangladesh and everywhere else the people in the industry does not think about when it writes its blog posts. From that position, the difference between a ten cent part and a one dollar part is not a rounding error and it is not a detail you get to wave past on the way to the interesting discussion about encodings. It is the difference between a class of thirty students each having their own chip and a class of thirty students watching one demo board if any at all. Instruction set elegance is a thing you can afford to care about once the hardware is already on your desk. Whether the hardware can get to your desk at all comes first. That is why the paragraph most people scrolled past is, to me, the most important one in the article.
Grinberg missed that part that RISC-V creates a space for the other 99% outside of "the world" (which in this space "world" is mainly the US and Europe) and it has nothing to do with architecture.