Posted on - 1 Comment on This Smartphone Tripod with Microphone is Designed for Audio/Video Recording

This Smartphone Tripod with Microphone is Designed for Audio/Video Recording

More and more use cases are being handled by smartphones, and we’ve recently seen smartphone stands helping with specific applications such as keyboard and mouse mobile gaming, or a flexible lazy holder allowing you to carry the phone around hands-free among other things. I’ve now come across another smartphone stand that’s designed for audio recording with a built-in microphone, and that could be useful to video bloggers, or others requiring high(er) quality audio recording on the go. Specifications & key features: Microphone Material – ABS + Aluminum alloy Monomer: Electrets condenser Directivity – Heart-shaped Test voltage: 1.5V Impedance: 220Ω Sensitivity: -39db±3dB (0dB=1V/Pa at 1kHz) S/N: ≥65dB 3.5mm audio jack connector 360 degree tube rotation design for microphone holder Foldable tripod with adjustable clamp for smartphone The accessory works with any phones that comes with a 3.5mm audio jack, or  adapter for phones with a USB type C port only. The full kit includes the microphone itself, a windproof cover, a …

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Posted on - 3 Comments on Primebook Laptop Runs Android based PrimeOS with Start Menu, Multi-Tasking Support, Key Mapping, etc…

Primebook Laptop Runs Android based PrimeOS with Start Menu, Multi-Tasking Support, Key Mapping, etc…

After solutions such as Remix OS and Phoenix OS, PrimeOS is the latest attempt to bring Android OS to the desktop with support for a start menu, a status bar with pinned apps, multiple windows & multi-tasking, key mapping for playing games with keyboard, various power modes, and so on. Floydwiz Technologies Pvt. Ltd has ported their Prime OS to Arm and x86 laptops which they call Primebooks. The first model is based on Rockchip RK3288 Arm processor with the following specifications: SoC – Rockchip RK3288 quad core Cortex A17 processor @ up to 1.8 GHz with Arm Mali-T764 GPU System Memory – 2 GB LPDDR3 RAM Storage – 64 GB flash + micro SD slot up to 256 GB Display – 14.0″ TN LCD HD Display (non-touch) Video Output – mini HDMI port Audio – 3.5mm audio jack, built-in microphone and speaker Connectivity –  WiFi 802.11 b/g/n + Bluetooth 4.0 USB – 2x USB 3.0 ports Battery – 10,000 …

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Posted on - 1 Comment on Making a DIY Case Out of PVC Pipes & Fittings for Electronics Projects

Making a DIY Case Out of PVC Pipes & Fittings for Electronics Projects

If you’ve ever visited Thailand, you may have noticed blue PVC pipes that are for water supplies, and usually visible since most of the time they are not placed underground. The pipes and fittings are very cheap, easy to find, and one person found out those could be used to make DIY cases for electronics projects. The two specimen above are a LoRaWAN node & gateway. The former is based on ESP07(ESP8266) module and RFM95W LoRa 868/915Mhz RF transceiver module, together with battery and sensors, while the latter is 1-channel LoRaWAN gateway or repeater, but I could not find the full details of the hardware design. I find that’s a clever idea, the design is pretty neat, and not everybody owns a 3D printer. An additional benefit is that it should be suitable for waterproof cases by adding some pipe glue to the unmovable parts, and a PVC screw cap to enable the replacement of batteries. Via สุทธิพงษ์ วงศ์เขียว on Facebook. …

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Posted on - 5 Comments on 24 Orange Pi Zero Boards Cluster and ArmWizard’s Debian Image

24 Orange Pi Zero Boards Cluster and ArmWizard’s Debian Image

ArmWizard forum member “-W.-” needed a cluster to test his firmware build and deployment solution for Orange Pi Zero boards which can deploy the firmware to multiple boards from one single board. So he procured 24 Orange Pi Zero boards, a 24-port switch, some USB hubs and debug board, as well as some other accessories, power supplies, and two wooden planks. That’s the results after assembly. So we have 4 tower of six Orange Pi Zero boards fairly neatly connected to the 24-port Ethernet switch with 30 cm Ethernet cables, and four black USB hubs for the USB to TTL debug boards. The side view below shows the boards are powered by micro USB cables connected to three different power supplies, cooling achieved via four fans,  and the power extension is hidden right underneath close to the Ethernet switch. The cluster will also be used for machine learning latter on,  at least to detect potential bottlenecks due to the relatively …

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Posted on - 4 Comments on My Experience with Dodocool AC750 WiFi Repeater

My Experience with Dodocool AC750 WiFi Repeater

A while ago, I tested Dodocool DC30S USB type C Hub with HDMI, USB port, and a card reader, and recently the company asked me whether I wanted to review another of their accessories. My ISP has recently taken the habit of being down several hours each month, so I rely on my neighbor’s WiFi (with he’s permission) in those case, but since the signal is too weak, I’m using a wireless audio streamer and a power bank to extend the signal and connect it to my router using WDS Bridging.  Then I saw Dodocool DC24 802.11ac WiFi repeater, so I decided to give it a chance. Dodocool DC24 A750 Repeater Unboxing I received the device is a cardboard box with some specifications. It’s an AC750 router/repeater with 300 Mbps @ 2.4 GHz + 433 Mbps @ 5 GHz. The product page linked above has some more details with the Ethernet port being Fast Ethernet (10/100M), and the solution is …

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Posted on - 5 Comments on FFmpeg 4.0 Released with Initial AV1 Support, aptX, etc..

FFmpeg 4.0 Released with Initial AV1 Support, aptX, etc..

Whenever you are playing videos on a machine running Linux, Android or Windows, chances the software is at least partially using code from FFmpeg, a free software project that produces libraries and programs for handling multimedia data. The developers just outed a new major release FFmpeg 4.0 “Wu” which adds new filters, more hardware features, drops Windows XP and ffserver, implements initial AV1 codec support, aptX, TiVo ty+, and more. FFmpeg 4.0 includes the following libraries version:

and some of the main changes include: Bitstream filters for editing metadata in H.264, HEVC and MPEG-2 streams Experimental MagicYUV encoder TiVo ty/ty+ demuxer Intel QSV-accelerated MJPEG encoding & overlay filter native aptX and aptX HD encoder and decoder NVIDIA NVDEC-accelerated H.264, HEVC, MJPEG, MPEG-1/2/4, VC1, VP8/9 hwaccel decoding mcompan & acontrast audio filters OpenCL overlay filter video mix filter video normalize filter audio lv2 wrapper filter VAAPI MJPEG and VP8 decoding AMD AMF H.264 and HEVC encoders video fillborders filter video …

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Posted on - 5 Comments on Run Linux Apps in (PixelBook) Chromebook with Crostini VM

Run Linux Apps in (PixelBook) Chromebook with Crostini VM

Ever since the first Chromebooks were released, it has been possible to run Ubuntu or other Linux distributions using Crouton (Chromium OS Universal Chroot Environment) on Chrome OS devices, but that requires to enable developer mode, which disables some of security features that come with Chrome OS. Google has now make it easier and safer with Crostini VM that does not require developer mode. The only downsides for now are that it only works on Google Pixelbook, and you need to install/run Chrome OS v67 dev channel with the #enable-cros-container flag enabled. Using Crostini is fairly straightforward. First start crosh terminal with Ctrl++Atl+t, and running the following command to create a VM, and launch a container:

This will start a Debian Stretch environment with networking and GUI support, so you can install & run programs like you would in Debian (e.g. apt install htop).  Kevin Tofel at AboutChromebooks managed to install the Eclipse IDE (See screenshot above) and Sublime …

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Posted on - No Comments on RAK8211-NB iTracker Battery / Solar Powered Module Comes with NB-IoT & Bluetooth 5 Connectivity, GPS, and 5 Sensors

RAK8211-NB iTracker Battery / Solar Powered Module Comes with NB-IoT & Bluetooth 5 Connectivity, GPS, and 5 Sensors

Rak Wireless has recently launched a new products called RAK8211-NB iTracker based on a Quectel BC95-G NB-IoT module, Nordic Semi nRF52832 Bluetooth 5 chip, and Quectel L70-R GNSS module. The asset tracker module also comes with 5 different sensors to monitor motion and environmental data, and can optionally be powered directly by a solar panel.RAK8211-NB iTracker specifications: Connectivity NB-IoT via Quectel BC95-G (Global) wireless communication module + SIM card socket Bluetooth 5 via Nordic Semi nRF52832 Arm Cortex-M4F micro-controller (Arduino compatible) GPS/GLONASS via Quectel L70 GNSS module Sensors LIS3DH 3-axis “nano” accelerometer LIS2MDL 3-axis digital magnetic sensor. Tilt sensor BME280 pressure, humidity and temperature sensor OPT3001 intensity of light sensor Expansion – 3x headers with SWD, 2x sensor out + tilt out (also usable as GPIO and analog inputs), 3.3V, GND, and reset Power Supply – 3.5V to 18V via solar panel (P2) or battery (P3) Dimensions – 43mm x 38mm x 18mm Temperature Range – 40°C to +85°C The …

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