QEMU 2.12 Released with Raspberry Pi 3, RISC-V Support

QEMU is open source machine emulator and virtualizer, which I used in the past at a time when Arm boards were more expensive or hard to get than today, and more recently I tested RISC-V Linux using QEMU (fork). QEMU 2.12 has now been released with some interesting new features including RISC-V support, and initial support for Raspberry Pi 3 machine model. The Changelog is rather long, but some other notable changes include: Cortex-M33 Armv8-M emulation, used by the new mps2-an505 board. Support for various AArch64 v8.1/v8.2/v8.3 extensions. Initial support for Raspberry Pi 3 machine model i.MX7 SoC and i.MX7 Sabre board emulation. Spectre/Meltdown mitigation support for x86/pseries/s390 guest Intel IOMMU support for 48-bit addresses Many SD card emulation cleanups and bugfixes. Etc.. You can get the source code and build instructions in the download page. If you are interested in running Debian on RPI 3 model, or/and want to […]

How-to Make Your Own 3D Printing Goo

Karl here…just want to do a little post about bed adhesion and what I have been doing for the past month. What spurred this is I saw a ton of videos on Magigoo a while back. It is a product that you wipe on your glass/mirror bed and 3D prints stick very well to it and once the bed cools the part pops off very easily. It is quite expensive and it got me to think about alternatives. I have used glue stick almost exclusively while printing on glass/mirror but a lot of time the prints stick too well and prints can get marred up removing with a tool. It is quite easy to make. 1 cup water and 1 large 22g Elmers glue stick. I put both in water and let sit thinking it would dissolve on its own. After several hours I got impatient and put it in […]

Khadas Edge2 Arm mini PC

Working on High Quality Low Cost DIY 3D Scanning using Structured Light

Hello all, Karl here. I just wanted to send a note about what I have been working on. As the title says shows it is about 3d scanning. I have found it pretty fascinating so far. These are mainly based on structured light 3d scanning. From Wikipedia: Structured light is the process of projecting a known pattern (often grids or horizontal bars) on to a scene. The way that these deform when striking surfaces allows vision systems to calculate the depth and surface information of the objects in the scene, as used in structured light 3D scanners. There are a few commercial offerings that I have run across or have found while searching around but they are very expensive. The first one I ran across was made by Einscan. They are over 1k and have been reviewed a lot. It seems like they put out a good product and keep […]

BQ Ciclop is an Open Source Hardware 3D Scanner Kit

I’ve already written about 3D scanners, and at the time mentioned the price range varied a lots from just around $100 fo entry-level models to over several thousands dollars for professional solutions. This morning I saw a tweet for one of the cheap model by HE3D, where they claimed the scanner to be “open source”,  so I asked, and while you could buy the kit with or without camera for $83.30 or $116.53 respectively,  the company shared a rar file with documentation, and design files, so you could also built it yourself, or modify it. 3D scanner kit content: bq ZUM BT-328 controller board micro USB cable Logitech  C270 HD webcam 42-stepper motor 2x Laser 12V/1.5A power supply 8mm Bobbin 4x  M3*12 self-tapping screws 2x  M3*20 self-tapping screws 10x M3*10 screws 6x M3 nuts 28x M8 nuts 18x M8 washer 2.5mm hexagon wrench 3x M8*30 screws 1x 16014 bearing 2x M8*382mm […]

Xiaomi Mi AI Speaker Mini Smart Speaker is Selling for $27 (in China)

Smart speakers are becoming cheaper and cheaper, and in the US and some other countries, Amazon Echo Dot can be purchased for under $50. But Xiaomi has come up with an even cheaper model – for the Chinese market – with their Allwinner R16 based AI Speaker Mini that has just launched for 169 RMB, or about $27, in China. XIaomi Mi AI Speaker Mini specifications: SoC- Allwinner R16 quad core Cortex A7 processor @ 1.2 GHz System Memory / Storage – TBD Speaker 1.5″ 4Ω speaker Frequency Range – 140Hz – 20000Hz Speaker sensitivity – 78dB/m/W Maximum output power – 2W 4x Microphones Connectivity – 802.11 b/g/n WiFi, Bluetooth 4.1 with A2DP support Misc – Microphone on/off button, volume buttons, and play/pause button Power Supply – 5V/2A via micro USB port Dimensions – 90 x 90 x 50 mm Weight – ~210 grams The speaker ships with a power […]

Ubuntu Touch to Be Officially Supported on Librem 5 Open Source Smartphone

Ubuntu Touch looked really promising as a Linux mobile operating system supporting mobile desktop convergence, so eventually some people would have been able to use a single device for their mobile and desktop needs. If was not for lack of trying, but sadly Canonical had to end the development of Ubuntu Touch due to lack of interest from phone manufacturers and the community at large, focusing their resources instead of the cloud and IoT. But some people were still very enthousiastic about Ubuntu Touch, Unity and convergence, so since the code was open source, UBPorts continued working on Ubuntu Touch on their own.  UBPorts developers have now collaborated with Purism to make Ubuntu Touch one of the officially supported operating systems for the Librem 5 smartphone. Librem 5 will still ship with GNOME based PureOS, but Purism will support customers who want to easily install Ubuntu Touch or PureOS with […]

UP 7000 SBC

NanoPi K1 Plus is a $35 Allwinner H5 Development Board using Raspberry Pi Form Factor

NanoPi-K1-Plus

Almost exactly one year ago, FriendlyELEC launched NanoPi K2 board powered by Amlogic S905 processor, following Raspberry Pi 3 form factor, but adding an eMMC flash socket, Gigabit Ethernet, 4K video playback, an I2S header, more memory (2GB RAM), and doing without a camera or LCD display interface. The company has now launched another similar looking model – NanoPi K1 Plus – based on Allwinner H5 processor, also equipped with one DVP camera connector, but losing one USB 2.0 port, and HDMI is limited to 4K @ 30 Hz. NanoPi K1 Plus specifications: SoC – Allwinner H5 quad-core Cortex-A53 processor @ 1.3+ GHz with Mali-450MP GPU System Memory – 2GB DDR3 Storage – micro SD card slot, eMMC flash interface Video Output – HDMI 1.4 up to 4K @ 30 fps, CVBS (composite) Audio HDMI digital audio output 3.5mm audio jack On-board microphone 7-pin 2.54mm pin header Connectivity –  Gigabit […]

GalliumOS is a Linux Distribution for (Intel) Chromebooks & Chromeboxes

When I wrote about Crostini VM to run Linux apps on Chromebooks last week, I was informed about GalliumOS, described as a fast and lightweight Linux distro for ChromeOS devices – meaning Chromebooks and Chromeboxes – that is based on Xubuntu. Compared to ChromeOS, GalliumOS – and other Linux distributions – provides the ability to run more programs and more flexibility, and GalliumOS is said to deliver improved performance, longer battery life, better touchscreen support, etc.. compared to competing Linux distributions. You can go over the Download page to retrieve an image for your Chromebook or Chromebox, and either replace ChromeOS or go for a dual boot setup. The distribution does not support any Arm Chromebooks for now, and only works with some Intel devices with or without caveats depending on the model used. Check out the hardware compatibility matrix for details. The source code can be found on Github. […]

Khadas VIM4 SBC