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Open Hardware/Modding Leftovers

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Hardware
  • Arduino Blog » ESUB Tracks is a smart bicycle helmet with built-in electronics for enhanced safety

    Bike helmets can help minimize injuries in the event of an accident, but could a helmet also be used to help prevent a crash, or even enhance your riding experience? ESUB Tracks from WertelOberfell attempts to do both, featuring a variety of electronic enhancements which are powered by photovoltaic cells wrapped around its outer surface.

    ESUB Tracks includes a lighting arrangement on the back for turn signaling, triggered using voice commands to the helmet’s piezoelectric microphone. Additionally, it has a sensor to detect rapidly approaching vehicles from behind, warning the wearer of this condition via haptic feedback. Bone-conductive speakers are provided for listening to Bluetooth audio, and if all of that wasn’t enough, it even tightens down the straps when the buckle is fastened.

  • Take part in the PA Raspberry Pi Competition for UK schools
  • ESP32-S2 board targets battery-powered applications with 30uA deep sleep power consumption

    A few months ago, Olimex unveiled renders of ESP32-S2-Devkit-LiPo WiFi board that was supposed to consume as little as 2uA in sleep mode, follows ESP32-S2-Saola-1 board form factor and pinout, and adds an ultra-efficient circuitry to support LiPo batteries. The good news is that Olimex has now launched two versions of their ESP32-S2 board optimized for battery-powered applications with ESP32-S2-DevKit-Lipo and ESP32-S2-WROVER-DevKit-Lipo (with 2MB PSRAM) going for 5.56 Euros and 6.36 Euros respectively.

  • Testing PTFE Tube for 3D Printing

    Karl here. I’m back with a short article on some testing that I did on PTFE tube. When I received the Sovol SV02 3D printer it came with some baby blue replacement PTFE tube. It came preinstalled with the regular white stuff that most Bowden style printers come with. I have also been thinking about different ways to use the Retraction Calibration Tool I created.

More in Tux Machines

Music Production on Guix System

The working title “Ode to One Two Oh” was an obvious choice, being a quasi-palindrome, and its five syllables suggested a time signature of 5/4. Where to from here? As I stared at my Emacs session with a Guile REPL (read, eval, print, loop) buffer I tried to recall what the letters “REPL” stand for. Clearly, in my case the “P” was for “Procrastination”, but what about the others? I had stumbled upon the chorus: a description of the Guix development process. Contribute as others before us have shared their contributions (Reciprocation), review patches and discuss (Evaluation), hack on something else (Procrastination), and repeat (Loop). The words suggested a simple descending melody, which would need to be elevated by a somewhat less simple chord progression. After trying out a few harmonies on the Grand Stick I remembered how terrible my memory was and decided that I would need to scatter the harmonies onto a canvas, listen to the whole progression, and adjust the lines as needed — all without having to build up muscle memory for harmonies and progressions I may very well end up discarding in the process. This is where my composition workflow probably deviates from most other people. Many would use a MIDI sequencer for that kind of approach, whereas I decided to hone in on the exact harmonies with an unlikely tool: the unparalleled music engraving application Lilypond. Lilypond sports a versatile language that covers primitive note input, the means of combining them to larger phrases and musical ideas, and the means of abstraction — it allows for musical ideas to be named and recombined in different shapes. For everything the language doesn’t account for with specialized syntax I can simply switch to Guile Scheme. No other notation software is as flexible and malleable as Lilypond. I let it generate both sheet music and a MIDI file — the sheet music is displayed in a PDF viewer in Emacs and the MIDI file sent to fluidsynth (because I trust my ears over my eyes). Read more

Proxmox VE 6.3 released

we have just released version 6.3 of our virtualization platform Proxmox VE. This release now integrates the stable version 1.0 of our new Proxmox Backup Server so that you can easily back up and restore your VMs and containers. Also, the stable Ceph Octopus is supported, and you can select your preferred Ceph version during the installation process in the GUI. We hope you like it! Read more

Videos/Audiocasts/Shows: PulseAudio, Ubuntu Podcast, and BSD Now

  • Does Pulse Audio Deserve The Hate It Gets? - YouTube

    In today's video we're going to talk about Pulse Audio specifically how Pulse Audio gets a lot of hate for being a terrible linux sound system and whether a lot of this hate is actually very justified.

  • Ubuntu Podcast S13E36 – Singing at the dinner table

    This week we have been playing DRAG. We discuss what we’ve been doing during lock down, bring you an extension of love, go over all your wonderful feedback and take a trip to ThinkPad corner. It’s Season 13 Episode 36 of the Ubuntu Podcast! Alan Pope, Mark Johnson and Martin Wimpress are connected and speaking to your brain.

  • BSD Now 378: Networknomicon

    Interview with Michael W. Lucas: SNMP and TLS book, cashflow for creators, book sale and more.

PHP 8.0 Released

PHP 8.0 is a major update of the PHP language. It contains many new features and optimizations including named arguments, union types, attributes, constructor property promotion, match expression, nullsafe operator, JIT, and improvements in the type system, error handling, and consistency. Read more Also: PHP 8.0 Officially Released With Many Language Additions, Better Performance