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Open Hardware/Modding: Raspberry Pi, Arduino, and More

Submitted by Roy Schestowitz on Wednesday 2nd of February 2022 12:42:57 PM Filed under
Hardware
  • Celebrate Black history this month with code!
  • Some Small Updates

    Hi everyone! The X2100 BIOS has been updated and the only change is the GPIO voltage for the Intel_HDA pin. The change from 3.3v to 1.8v should mitigate/eliminate EC issues with new motherboards (<100hrs of power up time). Huge thanks to jwise once again for his contributions.

  • Silicon die teardown: a look inside an early 555 timer chip

    Eric Schlaepfer (@TubeTimeUS) recently came across the chip above, with a mysterious part number. He tediously sanded through the epoxy package to reveal the die (below) and determined that the chip is a 555 timer. Signetics released the 555 timer in mid-1972 4 and the chip below has a January 1973 date code (7304), so it must be one of the first 555 timers. Curiously, it is not labeled 555, so perhaps it is a prototype or internal version.3 I took detailed die photos, which I discuss in this blog post.

  • It's dire: Raspberry Pi availability tracker is launched

    André has tried including all the official Pi vendors (who contractually will sell Pi models at MSRP and not the insane markups you'll find on eBay or Amazon), but some block script-based access, so only about half the vendors are currently accounted for.

    Checking yesterday, two models were available—across all the 29 models tracked. And today that number's down to one, a lonely CM4 model with 2 GB of RAM, 32 GB eMMC storage, and WiFi/Bluetooth.

  • Soldering Workbench Tour

    Over the past couple of years I have been upgrading the soldering equipment that I used to mostly repair Amigas and build new Amiga parts. Today I’m going to go through what I use and why I decided to purchase each one. The hope is that will help people trying to make similar purchasing decisions in the future.

    I have a workshop with a 6 meter kitchen counter on it and my soldering section takes up half that counter. I’m going to go from right to left in this post.

  • LTO Tape data storage for Linux nerds

    One of the common reasons to look towards LTO Tape is that it’s much cheaper than hard drives, where a 12TB SATA drive costs around £18.00 per TB (at the time of writing), a LTO-8 tape that has the same capacity costs around £7.40 per TB (at the time of writing). That’s a significant price difference. So, you may ask what is the catch?

  • Learn how to make your old pedal generator work with Zwift | Arduino Blog

    Zwift is a neat cycling simulator app that lets you experience a variety of bicycle adventures from the comfort of your living room. You can participate in bike races, cruise your favorite trails, or go on a leisurely ride through the country. Zwift’s key feature is that it reacts to your pedaling and vice-versa. So an uphill section increases the pedaling difficulty and your in-game speed correlates to your pedaling speed. Gene’s Green Machine found a way to integrate an existing bike with Zwift using Arduino.

    In order for this to work, you will need an indoor bike setup with a pedal generator. The generator creates resistance and its voltage output is proportional to the gear ratio and pedaling speed. By monitoring the voltage, you can tell Zwift how fast your virtual bike should move. Conversely, Zwift can adjust the real world pedaling resistance based on the virtual conditions. Steering isn’t a factor here, but that isn’t a major part of cycling at speed anyway. You also don’t get to experience the virtual weather elements, but that is a good thing as far as most people are concerned.

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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

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  • How To Install MongoDB on AlmaLinux 9 - idroot

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    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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