Tux Machines
Posted by Roy Schestowitz on Aug 10, 2023
=> Free Software Leftovers | Mozilla and Proprietary/Artificial Intelligence (AI)
=> ↺ Experiments in PID control with an Arduino UNO R4 Minima-powered robot
In this case, that sensor data comes from an ultrasonic rangefinder mounted to the front of the 3D-printed robot. An Arduino UNO R4 Minima board receives that data and controls the robot’s two motors through H-bridge drivers. That hardware is very straightforward so that Soileau could focus on the PID control. Tuning that is all about balancing the three constant values to get the desired performance. Soileau spent some time working on the Arduino sketch to get the PID control integrated and was eventually able to make the robot act like it should.
=> ↺ New ‘Downfall’ Flaw Exposes Valuable Data in Generations of Intel Chips
It’s been more than five years since the Spectre and Meltdown processor vulnerabilities sparked a wave of revisions to computer chip designs across the industry. The flaws represented specific bugs but also conceptual data protection vulnerabilities in the schemes chips were using to make data available for processing more quickly and speed that processing. Intel has invested heavily in the years since these so-called speculative execution issues surfaced to identify similar types of design issues that could be leaking data. But the need for speed remains a business imperative, and both researchers and chip companies still find flaws in efficiency measures.
This latest vulnerability, dubbed Downfall by Daniel Moghimi, the Google researcher who discovered it, occurs in chip code that can use an instruction known as Gather to access scattered data more quickly in memory. Intel refers to the flaw as Gather Data Sampling after one of the techniques Moghimi developed to exploit the vulnerability. Moghimi will present his findings at the Black Hat security conference in Las Vegas on Wednesday.
=> ↺ How to build a low-resolution thermal camera at a low cost using Arduino
Krejci’s design only has an 8×8 resolution, which is the maximum native output of the AMG8833 infrared sensor array. By conventional digital camera standards, that is too low to be usable. But it is enough for some simple tasks you might want to perform with a thermal camera. At that resolution, the device will act almost like a non-contact thermometer that shows you 64 points. You can identify hot IC chips and even see large thermal currents.
=> ↺ Raspberry Pi rides on turtle backs to monitor conservation areas
A Raspberry Pi Zero and a Raspberry Pi Camera Module were packed inside a waterproof enclosure, which was then harmlessly attached to the shell of a green sea turtle. Photos, video, and location data are collected from the Raspberry Pi, and the hardware detaches itself from the animal once its job is done. Read more about how this works in our in-depth Success Story about the Arribada initiative.
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