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Open Hardware/Modding/Programming

Submitted by Roy Schestowitz on Wednesday 24th of March 2021 06:22:34 PM Filed under
Development
Hardware
  • Automate analogue film scanning with Raspberry Pi and LEGO
  • Development of next-gen power_dist (part 1)

    The current iteration of the mjbots power_dist board released back in the summer of 2020 is pretty useful. It pre-charges the input, provides a soft switch, and gives you a bunch of output connectors to make wiring easier.

    However, this version did have some limitations and potential problems. The first is that the pre-charge method it uses, a simple on/off pre-charge resistor, is unable to support a wide range of supply voltages. Either the resistor has a low value, in which case large input voltages will cause thermal failure, or for larger values, it isn’t able to actually pre-charge the bus sufficiently before engaging the primary MOSFET.

  • Two dies in one package: Teardown of a vintage ROM with double the storage

    In 1971, semiconductor memory was still a new development so chips couldn't hold a lot of data. To double the storage capacity, IBM used the brute-force approach of putting two silicon dies into a 1-inch square package.1 The photo below shows a module with two face-down silicon dies, storing 4 kilobytes of data. In this blog post, I look inside this package, examine the dies, and explain how this ROM (read-only memory) was implemented. Although I expected the circuitry to be straightforward, the primitive MOS transistors of the time made the circuitry more complicated in several ways.

  • Portability has ongoing costs for code that's changing

    Some proponents of alternate architectures like to maintain that portability is free, or at least a one time cost (that can be paid by outside contributors in the form of a good patch to 'add support' for something). It would be nice if our programming languages, habits, and techniques made that so, but they don't. The reality is that maintaining portability to alternate environments is an ongoing cost.

  • Getting Drunk with Datalog

    See, I don’t have a very comprehensive liquor collection. I’ve got the basics, sure, and over the course of quarantining I’ve acquired a few fancier ingredients. But fancy ingredients usually aren’t very versatile: I bought a bottle of Amaro Nonino once to mix a Paper Plane. But it turns out I don’t like really Paper Planes. So now I just have, like, 97.1% of a bottle of Amaro Nonino, and nothing to do with it.1

    That was not very efficient purchase. We can do better.

    So I wrote a little program to tell me: given what I have in my bar right now, what should I add that will enable me to make the maximum number of new cocktails. Or in other words, what is my most efficient purchase – what is the ingredient that I am most “blocked on.”

  • Microsoft Surface "DTX" Driver Slated For Linux 5.13

    While Microsoft often likes to proclaim their "love" for Linux, it's been independent open-source developer Maximilian Luz that has been spearheading improvements for Microsoft Surface devices on Linux. With Linux 5.13 his latest work on better handling Microsoft Surface device detachment handling should land.

    Queued into the x86 platform driver area's for-next code is this Microsoft Surface DTX driver written by Luz.

»

More in Tux Machines

digiKam 7.7.0 is released

After three months of active maintenance and another bug triage, the digiKam team is proud to present version 7.7.0 of its open source digital photo manager. See below the list of most important features coming with this release. Read more

Dilution and Misuse of the "Linux" Brand

Samsung, Red Hat to Work on Linux Drivers for Future Tech

The metaverse is expected to uproot system design as we know it, and Samsung is one of many hardware vendors re-imagining data center infrastructure in preparation for a parallel 3D world. Samsung is working on new memory technologies that provide faster bandwidth inside hardware for data to travel between CPUs, storage and other computing resources. The company also announced it was partnering with Red Hat to ensure these technologies have Linux compatibility. Read more

today's howtos

  • How to install go1.19beta on Ubuntu 22.04 – NextGenTips

    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.

  • molecule test: failed to connect to bus in systemd container - openQA bites

    Ansible Molecule is a project to help you test your ansible roles. I’m using molecule for automatically testing the ansible roles of geekoops.

  • How To Install MongoDB on AlmaLinux 9 - idroot

    In this tutorial, we will show you how to install MongoDB on AlmaLinux 9. For those of you who didn’t know, MongoDB is a high-performance, highly scalable document-oriented NoSQL database. Unlike in SQL databases where data is stored in rows and columns inside tables, in MongoDB, data is structured in JSON-like format inside records which are referred to as documents. The open-source attribute of MongoDB as a database software makes it an ideal candidate for almost any database-related project. This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘sudo‘ to the commands to get root privileges. I will show you the step-by-step installation of the MongoDB NoSQL database on AlmaLinux 9. You can follow the same instructions for CentOS and Rocky Linux.

  • An introduction (and how-to) to Plugin Loader for the Steam Deck. - Invidious
  • Self-host a Ghost Blog With Traefik

    Ghost is a very popular open-source content management system. Started as an alternative to WordPress and it went on to become an alternative to Substack by focusing on membership and newsletter. The creators of Ghost offer managed Pro hosting but it may not fit everyone's budget. Alternatively, you can self-host it on your own cloud servers. On Linux handbook, we already have a guide on deploying Ghost with Docker in a reverse proxy setup. Instead of Ngnix reverse proxy, you can also use another software called Traefik with Docker. It is a popular open-source cloud-native application proxy, API Gateway, Edge-router, and more. I use Traefik to secure my websites using an SSL certificate obtained from Let's Encrypt. Once deployed, Traefik can automatically manage your certificates and their renewals. In this tutorial, I'll share the necessary steps for deploying a Ghost blog with Docker and Traefik.

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