When the Raspberry Pi Foundation launched the Raspberry Pi 4 last year, they described it as a “complete desktop computer”, but the truth is that it is not so powerful that, even if you choose the 4GB model, it cannot perform many of the tasks that can be done with a desktop computer. Today, the Raspberry Pi 4 gets an upgrade with a new 8GB version that will be added to the range of products.
Raspberry Pi 4 is equipped with the BCM2711 SoC, which is a 64-bit chip, the Raspberry Pi can actually support up to 16 GB of memory, so to improve data throughput performance and to improve its services to meet expectations of some geeks, or to make a wide range home network server, or users who need to open multiple web windows at the same time, Raspberry Pi 4 now has 8GB LPDDR4 version, at a price of $ 75.
The 8GB model was actually available earlier this year, but like everything, the COVID 19 pandemic caused a delay. The new Raspberry Pie 4 has been re-designed to accommodate the extra peak loads required for the enhanced memory package. Therefore the power supply assembly has been redesigned and the switch mode power supply on the right side of the board next to the USB 2.0 socket has been removed and replaced by a USB C power supply connector. Apart from that everything is the same as with the other models.
In addition to the hardware changes, Raspberry Pi has also updated its software to include a larger memory version, which is the 64-bit version of Raspberry Pi OS. In the past, Raspberry Pi’s official system used a 32-bit LPAE kernel and user environment, but with the arrival of hardware such as the SoC, which supports 64-bit computing and 8 GB of memory in the Raspberry Pi 4, the 64-bit system will also have to keep pace.
After splitting from Xiaomi and developing as an independent brand, Redmi has a lot of technology products ranging from smartphones, IoT devices, routers, home appliances, … to serve the different needs of users.
Xiaomi: Redmi Band for just under 13 euros
And recently Redmi has launched the new Redmi Band Smart Wristband. This is considered to be the first shot with which Redmi enters the market of portable devices.
The Redmi Band has a 1.08″ color screen that comes with 78 different dial options and 4 colors of the blue, black, red and brown wristband. According to the manufacturer, the product has a display quality and high contrast, making it easy for the user to observe when outdoors.
According to the Android Authority, the Redmi strap will be sold in China for only 14 USD. The listed Redmi price is even cheaper than the previous Mi Band 4, which was 22 USD.
However, the dial of the Redmi Band is probably not removable like the Mi Band 4 due to the lower price, and the device also uses a direct USB-A port and has a usage duration for up to 14 days after a single charge.
The Redmi Band is fully equipped with basic health monitoring functions, from sleep to heart rate to reminders user movements. It is equipped with 5 sport modes to help users monitor their health and maintain proper nutrition and training.
Optoma introduces the new 4K Ultra HD home cinema projector UHD51 with PureMotion intermediate image calculation and FULL 3D support. The model features a newly developed 4K precision lens and works with an RGBRGB color wheel.
Optoma Ultra-High Definition UHD51 4K Home Cinema Projector with Full 3D
The UHD51 features High Dynamic Range (HDR) compatibility, HDCP 2.2 support and a built-in speaker. With the vertical lens shift and a variety of connection options, installation is stress-free. At the same time, its 2,400 lumens should throw bright images onto the screen even in daylight. The beamer reaches a dynamic contrast of 500 000:1 according to the data sheet.
With the PureMotion intermediate image calculation, image jerking and blurring is avoided in high-speed action films or fast sports shots. An RGBRGB color wheel delivers accurate and lifelike colors.
With 8.3 million on-screen pixels, the UHD51 meets the requirements of the Consumer Technology Association (CTA) for 4K UHD and the CTA High Dynamic Range (HDR) display standards. 2x HDMI (HDCP 2.2) and VGA connections are available.
It features Optomas Amazing Colour Technology, with an advanced color wheel and a choice of modes and settings. The “Reference” mode delivers accurate images that are 100% compliant with the Rec.709 standard. For the sound two 5 watt speakers are available. According to the manufacturer, the lamp life in Eco mode is 10,000 hours.
The UHD51 is now available at a retail price of EUR 1,699.
More and more intelligent devices allow us to know the information of the place where we are. Such as temperature, humidity or air quality. Even so, they are often expensive devices and not too comfortable or straightforward to use. We recently discovered Sense. That is a small intelligent sensor capable of sending alerts to the mobile. And from today Sense is raising funds on Kickstarter.
Sense, a small sensor capable of sending alerts to the mobile
As you can see in the video that we show later, Sense is a sensor of small size. That is capable of keeping a record of different atmospheric variables. Such as temperature, humidity, air pressure, light intensity, noise, CO2 levels and much more. Also, it incorporates a motion sensor.
And one of the leading strengths of Sense is its small size, which allows us to carry it in the backpack and the bag or install it in any room of the home.
Once installed, Sense will send us to push notifications with useful information and recommendations. Also, its creators say that thanks to machine learning, data will be increasingly helpful and accurate as we use it.
Of course, we can also access the Sense app to see all the information gathered at a glance. And not only that, since the device is compatible with IFTTT, Alexa and Google Home, which opens a whole world of possibilities.
Without a doubt, we are facing a gadget of the most interesting. In fact, in the absence of 35 days to close the funding campaign on Kickstarter, its creators have already raised more than 13,000 of the $ 20,000 needed to start the manufacturing of Sense. As for its price, it will sell for $ 50 as of this summer. Then, we leave you with the presentation video:
Microsoft HoloLens is one of the first real augmented reality headsets. This high-end device offers an impressive experience and manages to mix the virtual reality with reality dramatically. However, some bugs and technical problems can spoil the experience. Here’s how to solve the most common concerns of HoloLens.
While the general public eagerly awaits the Magic Leap One or AR glasses from Apple to discover augmented reality. But professionals can already get the Microsoft HoloLens for 3000 euros. Unfortunately, this high price does not guarantee an accurate operation. Here are the solutions to solve the main bugs and problems of Microsoft HoloLens.
Microsoft HoloLens does not start or response
If your Microsoft HoloLens does not start, there are two cases. And if the LEDs next to the power button do not light, or if only one LED flashes briefly, the HoloLens may need to be charged. If the LEDs light up when you press the power button, but nothing appears on the screen, press and hold the power button until the 5 LEDs go off.
If the HoloLens hangs (freeze) or stops responding. Then turn off the power by pressing the power button until the 5 LEDs next to the power button go off. If the LEDs do not respond, then press and hold the button for 10 seconds. Press the power button again to restart the headset. If this solution does not work, restore the HoloLens.
HoloLens holograms display poorly or move
If HoloLens holograms seem unstable or not displayed correctly, here are some possible solutions. Start by cleaning the HoloLens screen to make sure nothing is blocking the sensors. Also, make sure the room is adequately lit.
You can also try to move around and observe your surroundings to see if the HoloLens can scan it better. You can then launch the Calibration application, allowing you to calibrate the HoloLens about your vision. To do this, go to Settings> System> Utilities. In the Calibration tab, choose the Open Calibration option.
As a last resort, launch the Sensor Tuning application to adjust the sensors on the device. Go to Settings> System> Utilities. In the Sensor Setup tab, choose the option Open Sensor Tuning.
These solutions also apply if your HoloLens frequently enters limited mode. They can also solve the problem if a lost tracking message is frequently displayed.
The Microsoft HoloLens does not respond to gestural or vocal commands
If the HoloLens does not respond to gesture commands, your hands may be out of the camera’s field of view. Make sure your hands are in the frame that extends about 60 centimeters around you. If the HoloLens can see your hand, the dot-shaped cursor will turn into a ring.
If your environment is too dark, the HoloLens may not see your hand. Make sure the room has enough light. If your visor is dirty, use the microfiber cloth supplied with the helmet to clean it.
If the Cortana Virtual Assistant does not respond to voice commands, then first make sure it is enabled. To do this, go to the list of applications (All applications), and choose Cortana> Menu> Notebook> Settings.
Microsoft HoloLens: a problem with the Xbox Wireless Controller
If you have a problem with your Xbox Wireless Controller for Microsoft HoloLens, there are several possible solutions. First, the Xbox Wireless Controller S must be updated before it can be used with the HoloLens. So make sure it’s up to date before trying to pair it with the HoloLens.
If you restart the HoloLens while the Xbox Wireless Controller is connected, the controller will not automatically reconnect to the HoloLens. The Guide button will start blinking slowly for three minutes; then the controller will turn off. To reconnect immediately, turn off the controller by holding down the Guide button until the light goes out. By relighting the controller, he will reconnect to the HoloLens.
Finally, if the HoloLens enters standby mode while the Xbox controller is connected, any command will wake up the headset. To avoid this, turn off the controller when you are not using it.
Microsoft HoloLens does not connect to WiFi
When attempting to connect to WiFi with Microsoft HoloLens, you must enter your username and password in less than two minutes. Otherwise, the identifiers will be automatically deleted for security reasons.
In fact, you will not be able to connect to WiFi. For long passwords, Microsoft recommends using a Bluetooth keyboard.
Can not place holograms or see previously set holograms
If the HoloLens cannot map your environment, it will go into the limited mode, and you will not be able to place holograms in the room or see previously set holograms. To solve the problem, several solutions are possible.
First, you can ensure that your environment is adequately lit. Also, check that you are connected to a WiFi network. Otherwise, the headset will not be able to identify your space. If you need to create a new area, connect to WiFi and restart the Hololens. If your HoloLens is unable to create a new space, your disk space is likely to be full.
To verify that the desired space is enabled or to load a space manually, go to Settings> System> Spaces. If the area you want is loaded and you still have problems, space may be corrupted. To solve the problem, choose the space and select the Delete option. HoloLens will then scan your environment again to create a new area.
Similarly, if your HoloLens is unable to determine what space you are in, make sure you are connected to WiFi and that your room has enough light. Make sure there are no significant changes in your space. You can also load a space manually or manage your spaces by going to Settings> System> Spaces.
Microsoft HoloLens Displays “Disk Space Failed” Error
If your disk space is full, you will need to free up storage space. To do this, start by first deleting the unused spaces. Go to Settings> System> Space, and eliminate the spaces you no longer need. You can also remove previously placed holograms, or delete images and videos in the Photos application.
Finally, you can remove some applications from your HoloLens. To do this, go to the list of apps (All forms), hold down the app you want to delete and choose the option “Uninstall.”
TimeFlip is here to organize your life. It keeps a strict eye on you for your goals completion. TimeFlip is a gadget with many useful features. Some of us try to manage our time through calendars and organizers, but ultimately it’s hard to get regular on time. So, the matter was solved by activity trackers. Thanks to the new gadget, the tracking and recording of our activities motivated us to continue and maintain continuity in the analysis (reaching the goal). TimeFlip is a time monitoring gadget that can achieve similar results.
TimeFlip: How it works?
The TimeFlip device resembles a more robust board game cube (or instead RPG). However, a multilayer stable is much larger and has a different task. We do not draw the page here and set it up with symbols. Since then, the device counts time spent on a specific job and saves it to the mobile application on the smartphone.
It creates a whole sequence of events, that is, the history of our tasks with specific results. Of course, you have to remember about continually turning the cube. If we implement it and we will log in the data carefully, we will get quite impressive statistics.
Such a database in the profile will give us a lot of information from the whole day, or even a week or a month. I will examine what we are wasting our time and where we could find more of it. It is an elementary system.
It comes for those who really would like to know the details about everyday functioning. The truth is that you have to go everywhere with TimeFlip. But this fact alone can increase awareness about the sense of wasting time. We prepare own walls ourselves. It all depends on the individual way of functioning and work.
The authors have prepared a set of stickers on pentagonal walls. There are a lot of them in the ankle, so we should fit all the most essential tasks that usually last a bit longer. For example, we can mark a field with fun or surf the net, but also duties. We determine the activities ourselves. You just have to enter them in the application, so that the whole time will come correctly.
The project is trivial in its idea, but also very minimalistic in the format. It is a pity that it was not possible to create LED walls, then marking the fields would be more useful and much faster (and probably with a more excellent range of activity), but perhaps a bit more expensive. TimeFlip first comes at CES 2018. It is expected to be available for sale this year. Even DIY kits are available. In my opinion, the toy could be no more compact.
The original JBL Xtreme has been a Bluetooth speaker of remarkable success, but it had to renew. For that reason there comes this Xtreme 2: better resistance to water, greater connectivity, more robust. The JBL Xtreme 2 will be available for 300 euros from the summer of 2018. There will be three colors: black (Midnight Black), green (Forest Green) and Blue (Ocean Blue).
The new JBL Xtreme 2 receives the IPX7 certification, meaning that it can immerse itself in water and survive. Theoretically, up to 1 m deep and for 30 minutes. The previous Xtreme was IPX4, that is, it only resisted splashes so that this change will be very well received. The pool, the beach, the rain in the countryside.
The materials and finishes are first class: metal base, metal hooks, resistant fabric. Also, this speaker will overcome the riskiest adventures. It even has a bottle opener on the hanger, a real provocation.
The current Bluetooth connection allows you to connect two phones or tablets so that everyone can start putting their favorite playlist. The JBL Connect + technology, another evolution concerning the Connect to dry off the previous Xtreme, allows it to be compatible with up to 100 speakers connected. A good party … but we will use it with some other JBL, and that is useful.
The internal Lithium battery supports up to 15 hours of playback. We can charge the mobile through a USB output on the speaker if we need it. It is charged with a micro USB in any outlet or charger. And it has a direct connection (stereo jack) if we do not want to spend as much battery (of the speaker and the mobile), besides that this link can improve the quality of the sound.
Excellent connectivity, long battery life, and resistance to water or impacts are good things. But from a JBL powerful music is expected, and the Xtreme 2 complies. It has a new JBL Bass Radiator bass radiator. The internal loudspeakers have been improved and also the passive radiators (there is no bass reflex for its submersible condition). The result is music with better bass and more definition.
That clarity helps in another increasingly common use of Bluetooth speakers: as hands-free to hold group conversations (or alone). The JBL Xtreme 2 has a microphone equipped with echo reduction and background noise. Thus, not only will we listen better to our interlocutor but he or they will hear better to us.
The smart speaker concept had come a long way since 2014 when the first Amazon Echo arrived. Today, there are available no less than six speakers based on Amazon Alexa. Thanks to the success of Amazon, Google now also offers smart speakers with the technology of Google Assistant and is undoubtedly the other great protagonist of the segment.
However, these are not the only intelligent speakers, Thanks to the public software development kits, other hardware companies also participate in the game. The following are five excellent alternatives to those offered by Google and Amazon.
It is a communication device connected to Wi-Fi and Bluetooth. Presented for the first time in late 2015, Triby Smart Speaker was the first third-party speaker based on Amazon Alexa with far-field voice capabilities. It has compatibility with Apple HomeKit, Spotify Connect support, and Internet radio stations.
In addition to listening to music and asking Alexa about the latest sports scores, weather, and other information, it is also a hands-free calling device, which allows family members to always be in touch.
These speakers have an outstanding sound and low 360 degrees. Resistant and waterproof, which makes them an ideal alternative for summer nights by the pool and afternoons on the winter slopes. Ultimate Ears is known for its modern and trendy products, and these two speakers do not disappoint. Each one is ideal for those looking for a mobile solution; They offer multiple color options, excellent sound and are also water resistant.
It is a product that was designed with the sound of several rooms in mind; the JAM Symphony speaker works with Spotify, iHeartRadio, TuneIn, Tidal and more. A built-in intercom system allows you to transmit your voice to other rooms.
Although buying multiple smart speakers that interact with each other can be a costly proposition, JAM is one of the alternatives available that has more moderate prices. You can add up to eight speakers to your configuration, including the JAM Rhythm, the smallest variant.
That is probably the most recognized alternative in this collection. And there are good reasons for this. Because the Sonos One incorporates two Class-D amplifiers, a subwoofer, a tweeter and six far-field microphones. It communicates through a corresponding application and a music transmission service through Wi-Fi. It is also fully compatible with Amazon Alexa, and in 2018, you will even get support from the Google Assistant.
This high-definition speaker features eight built-in 360-degree far-field microphones so that you can capture your voice from more than 5 meters away, in any direction.
It also includes noise cancellation technology that ensures that Amazon Alexa listens to your commands even when playing music in the background. The Lenovo Infinity offers a refreshing design and high-end specifications at a reasonable price. It is a good option for small houses and apartments.
The well-known manufacturer of audio solutions for gamers SteelSeries, today announced a new version of its Arctis 3 headset. That highlights the novelty of being a Bluetooth headset.
These new headphones come with the promise of offering compatibility for the new Nintendo console, Switch. In addition to apparently being compatible with PCs, Mobiles, Tablets and the two new generation consoles, Xbox One and PlayStation 4.
SteelSeries launches a Bluetooth version of its Arctis 3 headset
This new version maintains the original characteristics of the Arctis 3 headphones. That comes with two 40mm drivers that operate between 20-22000 Hz. Also, there is a microphone that works between 100Hz – 10000Hz with a sensitivity of -48 dB.
Arctis 3 Feature and other information
In addition to being able to connect via Bluetooth 4.1 to all devices with this connectivity, the headphones have an accessory with a quad input jack or 3.5mm dual jack to connect via cable to all devices that do not have Bluetooth available.
In this way, players reduce the mess of cables that could mean other options in the market.
Of course, players can use other applications if they wish for a similar use. Such as the Discord mobile app, or any other. So they can receive calls, join voice calls over IP or listen to their music.
The system has customization software for sound configuration, removable and interchangeable cables and the option to share the sound with other people. The integrated microphone is a bidirectional SteelSeries ClearCast with effective elimination of ambient noise.
The range of these headphones is 10m from the device they are connected to, and they have a starting price that should slightly exceed € 150.
Compulab has released the universally applicable Mini-PC Fitlet in its second generation format. For the Fitlet2, the manufacturer relies on Intel Apollo Lake instead of AMD. In the compact and only 2.5 to 3.4 inches high housing there is quad-core CPU and up to 16 GB of RAM that are passively cooled. Also, the FACET cards expand the functions.
Compulab Fitlet2: Modular Mini PC with Apollo Lake from $ 153
Intel Apollo Lake follows on AMD Mullins.
In the predecessor, Compulab had still set on an AMD SoC in the form of the A10 Micro-6700T ( Mullins ). On the motherboard of Fitlet2, there is an Intel SoC generation Apollo Lake. The model is Atom x7-E3950, and Celeron J3455 with four cores and the Atom x5-E3930 with two cores are available. The SoCs comes with a maximum of 12 watts TDP. You have up to 16 GB DDR3L RAM at that comes with the individual SO-DIMM slot.
Fanless cooling in a modular housing
The waste heat must be handled by the housing alone because there are no fans. The case of the Fitlet2 comes in different variants. The low-power chassis is only 2.5 inches high. However, the performance chassis has good cooling fins and comes to 3.4 inches. Length and width are the same at 11.2 × 8.4 inches. Also, the industrial frame is full due to its mounting plate. The housing held together by four screws that you can dismantle easily. So, this makes component assembly easier.
I/O Ports Available
The illustrations show two USB 3.0 ports, audio jacks, status LEDs and a microSD slot in the front. The back panel comes with two USB 2.0 ports, HDMI, Mini DisplayPort, two RJ45 (LAN) ports, a serial port (RS232) and an external power supply socket. The power consumption is estimated at 5 to 15 watts and varies depending on the configuration and utilization. Also, there is one M.2 slot is available for SATA SSDs of 60 or 42 mm in length.
If required, additional modules called FACET cards (Function and Connectivity Extension T-Cards) provide other functions. These are inserted into a slot that is also compatible with M.2 cards with E-Key and offer, for example, four additional USB ports or double the number of Gigabit Ethernet ports to four. Others extend the storage options and allow the use of M.2 2280 or micro-SIM. Wi-Fi and Bluetooth are also optional. The FACET interface includes PCIe, eDP 1.3 and I²C. A block diagram (PDF) goes into detail.
Pricing and Availability
The Fitlet2’s BIOS supports both Windows 10 and various Linux versions including Linux Mint. The latter is not surprising because a MintBox based on the same chassis comes with it. The Fitlet2 is available now at a starting price of $ 153. However, as per Fanless Tech reports, there is the immediate availability of the Fitlet2 at merchants Tiny Green PC, Amazon and Compulab in the coming weeks. Further details on the product are provided by the manufacturer:
Dimensions (L × W × H)
Low-power chassis: 112 × 84 × 25 mm
Performance chassis: 112 × 84 × 34 mm
Industrial chassis: 112 × 112 × 25 mm
Metal / purely passive (without louvers)
Intel Atom x7-E3950 (4 cores) or Atom x5-E3930 (2 cores) or Celeron J3455 (4 cores)
Max. 16GB DDR3L-1866, 1.35V, Non-ECC (1 × SO DIMM)
M.2 2260/2242 (M-Key, SATA 6 Gbps only, M.2 2280 optional via FACET card) or
2.5 “HDD / SSD or
up to 4 × Gigabit Ethernet (Intel I211), two onboard and two via optional FACET card
WLAN / Bluetooth module (optional, 802.11ac / BT 4.2)
4G modem (optional)
2 × USB 3.0 (front), 2 × USB 2.0 (back), 4 × USB 2.0 (optional via FACET card)