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Devices and Open Hardware Leftovers

Submitted by Roy Schestowitz on Monday 20th of September 2021 10:37:39 PM Filed under
Hardware
  • 3U rack mount takes up to 12 NVIDIA Jetson Nano/Xavier NX boards - CNX Software

    Myelectronics.nl has launched a 19-inch 3U rack mount taking up to twelve NVIDIA Jetson Nano or Jetson Xavier NX boards building on its experience with rack mount for Raspberry Pi introduced last year.

    The new model also includes front removal mounting systems so that you can replace a Jetson board without having to completely remove the rack mount, and even without having to power off the remaining boards since the boards would have to be powered from the DC jack or (not recommended) the Micro USB port on the front panel. PoE is probably not an option, albeit available on the Nano board, due to mechanical constraints.

  • Raspberry Pi IoT In C - The Linux GPIO Driver

    Until recently the standard way to work with GPIO in Linux was to use the sysfs interface and you will see a lot of articles advocating its use and you will encounter many programs making use of it. Sysfs was deprecated in Linux 4.8 at the end of 2016 and is due for removal from the kernel in 2020. Of course, it takes time for Linux distributions to make use of the latest kernels. At the time of writing Pi OS, formerly Raspbian, is using Linux 4.19 released two years earlier. Nevertheless, Sysfs gpio will soon be removed and while you still need to know about it to cope with legacy software, you shouldn’t use it for new projects. You can find out how it works in Appendix I.

    Its replacement is the GPIO character device and, while this looks superficially like the old sysfs interface, it has many major differences. Although it has some advantages, it also is slightly more complex and can no longer be used from the command line – it is a program-only interface. This said, there are some simple utility programs that are fairly standard and allow GPIO control from the command line. These are covered in the first part of the chapter, even though they are unlikely to be the main way that you work with the new interface. There is also a wrapper library called gpiod which isn’t necessary for simple access to the GPIO lines. If you want to know more see - Raspberry Pi IOT in C With Linux Drivers, ISBN:9781871962642

  • Drunk Wall Clock Uses Convoluted Circuits To Display Time | Hackaday

    Here at Hackaday we can never get enough of odd clocks, and we’re delighted to see [Dan O’Shea]’s creation called the Wifi-Telnet-FPGA-NTSC Drunk Wall Clock. That mouthful is an accurate description of what it does: at the heart of the device is an ESP32 that uses WiFi to connect to a Raspberry Pi. It then telnets into the system, logs in, and requests the current time using the Linux date command. So far, so ordinary.

  • Zom-B-Gone! is an artificial sunrise lamp to combat morning grumpiness | Arduino Blog

    Almost no one enjoys being suddenly awakened by a loud, blaring alarm clock, as the sudden rush of panic can contribute to grogginess and stress. To alleviate this problem, Norwegian makers Applied Procrastination wanted to created a lamp that simulates a sunrise to give users a calmer, more natural waking up experience. They came up with a design utilizing an old LCD panel that has had its internals replaced by a string of LED lights to give a pleasant and diffused glow when activated, which they call the “Zom-B-Gone!”

  • Self Balancing Robot Needs A Little Work | Hackaday

    A self-balancing robot isn’t a new idea, but we liked the aesthetics of [Maker ATOM’s] build. The use of a breadboard and a printed bracket looks good, as you can see in the video, below.

    Like most first-time projects, though, there were some lessons learned. The power supply needs a little work and the range of balance compliance didn’t meet expectations. But those problems are soluble and, as usual, you often learn more from working through issues like these.

    The heart of the system is an MPU6050 which provides a gyroscope and accelerometer along with fusion capability onboard. The availability of libraries for the sensor and the PID controller makes the project pretty simple to finish.

»

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today's howtos

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    In this tutorial, we are going to explore how to install go on Ubuntu 22.04 Golang is an open-source programming language that is easy to learn and use. It is built-in concurrency and has a robust standard library. It is reliable, builds fast, and efficient software that scales fast. Its concurrency mechanisms make it easy to write programs that get the most out of multicore and networked machines, while its novel-type systems enable flexible and modular program constructions. Go compiles quickly to machine code and has the convenience of garbage collection and the power of run-time reflection. In this guide, we are going to learn how to install golang 1.19beta on Ubuntu 22.04. Go 1.19beta1 is not yet released. There is so much work in progress with all the documentation.

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  • How To Install MongoDB on AlmaLinux 9 - idroot

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