LATEST ARTICLES

Website that runs on Solar Powered Raspberry Pi

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When we think of a website we think of a domain name and hosting (web space) to store and run our code uninterrupted. Domain and hosting has become a part of tech Business now. Tech giants like Google, Microsoft, Amazon, Alibaba etc. also have been investing in cloud and have been providing cloud resources. Lets take an example of Facebook for simplicity, It has almost 4 billion users now and Its servers must serve almost 1 billion hits per day. This takes a lot of resources (RAM, SSD / HD storage facilities etc), 24 hour redundant backups, power supply and High Speed Internet connection. So, the point is that, to run a facebook like website one must have a huge datacenter with a lot of servers . So, a lot of electricity is used up as these server must be up and running 24×365 days.

To conserve power most of the retail hosting providers like green geeks use 100% solar energy to power their data center. Google also is trying to catch-up with environmental friendly clean renewable energy to power their cloud infrastructures.

What we found on the internet today must be interesting to all the tech enthusiast. You must have heard about raspberry pi, a pocket sized computer low cost computer having a arm processor , a RAM and storage unit . It can run any OS and also has I/o ports. Raspberry pi’s have been used in different part of the world for different purposes like learning, robotics etc but did you know that solar powered raspberry pi also have been used as a VPS to power a website ?. A blog called Louwrentius uses Raspberry pi powered by solar energy to run. The blogger have installed 150 Watt solar panel in his balcony to power a raspberry pi . He have used a raspberry pi 3b+ model and set it up to be used as a web server .

SpecificationRaspberry Pi 3 BRaspberry Pi 3 B+
CPU type/speedARM Cortex-A53 1.2GHzARM Cortex-A53 1.4GHz
RAM size1GB SRAM1GB SRAM
Integrated Wi-Fi2.4GHz2.4GHz and 5GHz
Ethernet speed10/100 Mbps300Mbps
PoENoYes
Bluetooth4.14.2
comparision between raspberry pi models

He also have used an old car battery, solar panel, solar charge controller, LCD display, etc.

Solar PanelMonocrystalline 150 Watt 12V
Battery12 Volt Lead Acid Battery (Exide 63Ah)
Solar Charge ControllerVictron BlueSolar MPPT 75|10
Voltage/Current sensorINA260
LCD DisplayHD44780 20×4
ComputerRaspberry Pi 3b+
Communications cableVE.Direct to USB interface
Parts used by the blogger

If its gloomy or cloudy day the solar and battery may run out. To stop this from happening the blogger have used HAproxy which redirects to an instance of his blog on the a cloud VPS.

To conclude, this DIY is a little efficient and simple to perform but it has downfalls too because the solar panel doesnot output to handle important devices like router and switch. But All in All thus is a good project to start with an unused raspberry pi.

Nepal Government to fund innovative startups upto 50 lakhs (final registration date 9th June 2020)

Amid corona virus pandemic Nepal Planning Commission (Rastriya Yojana Aayog) published a notice (11th May 2020) announcing funds for innovative startups. Only those startups who have been registered in Nepal legally can apply for this fund within 30 days (i.e. 9th June 2020). Nepal National Planning Commission shall fund the startup based on Start up funding procedure, 2076 and Startup funding criteria, 2077. You can get these from the links below.

According to the criteria the person/company requesting for the funds should be self-educated or have done research about the subject matter on the topics of their proposal. New innovation , invention and skill in the area of Information Technology, Agriculture, Energy, Health, Tourism, Industries etc which will uplift the lives of Nepali people can be registered for this grant. The company should be a registred company under the same faculty similar to the startup proposed and should also be registered in the Inland Revenue Department of Nepal. The proposal should specifically mention the total investment of the project, funding requested from the GoN and also mention any other project working partners or funding partners in the project.

After the selection the funds provided by the NPC shall be directly transferred to the company bank account in 3 installments. 1st installment shall be done after the selection of the proposal, 2nd and 3rd installment is deposited after timely submission of progress reports and the inspection of the project progress by the relative department.

Startup funding Notice from National Planning Commission, Nepal

You can easily register your company through this link .

Mayan City unvieled by LIDAR technology

LASER has many applications one of them is Lidar (/ˈlaɪdɑːr/, Light Detection and Ranging) is a method for measuring distances (ranging) by illuminating the target with laser light and measuring the reflection with a sensor. Differences in laser return times and wavelengths can then be used to make digital 3-D representations of the target. It has terrestrial, airborne, and mobile applications. LIDAR technology is usually mounted in drones and airplanes and then the on flight data is stored and processed.The light bounces/ reflects back the using different computational techniques in post processes LIDAR produces a height map of the surfaces as these laser light can go though canopy and caves and find the level of ground beneath.

LIDAR was carried out in Tabasco region of Mexico, where early Mayan civilization was known to exist. The area were scanned in two phases first large area were scanned in low spectral resolution and then if any leads were found the small area were then scanned using UAV’s with high resolution.

SpaceX Falcon 9 used Linux OS to Launch Astronauts to the International Space Station

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Amid corona virus pandemic Space X launched its first manned rocket to the space. The year 2020 was not a good start, not to the US as death tolls were rising but there was sheer of joy in the US because they had launched a rocket from US soil to the International Space Station (ISS) after a decade. This made Space X the first private company to launch NASA’s astronauts. SpaceX mission is still incomplete as the main objective us to reuse the ship and bring back the astronauts safely to the earth. Astronauts will be staying and serving the ISS for 110 days and then return to earth in the same ship. From the year 2010 Space X’s falcon 9 rockets had been launched 89 time with 87 mission successes. And after 10 years Space X made a history.

Interesting thing about Falcon 9 was it uses linux system. As many mission critical and real time technologies uses Linux . As reported, there-were 35 core developers who coded the falcon 9 and the simulation software. The Falcon 9 onboard processor consists of 3 dual-core x86 processors and the flight software is completely coded on C/C++. Space X is also the first private space agency to use open-source software in the space.

Falcon 9 Rocket Family Credit : Wikipedia

3 processor cores are used because SpaceX uses an Actor-Judge system which provides redundancy. Every time a decision is made, it is compared with the results from the other cores. If there’s any disagreement, the decision is void and the process is restarted. If every processor core comes up with the same result than only the decision is sent to the PowerPC microcontrollers. 

The Falcon 9 Dragon spacecraft runs on Linux with flight software written in C and C++. The touchscreen interface is processed using Chromium and JavaScript. and the astronauts have physical buttons to control the spacecraft

OnePlus Z | Full Specification, Release Date and Pricing Leaks

OnePlus to release a mid range phone with mid range Qualcomm chip and 12 GB of RAM. As seen in reports, Oneplus Z has been listed on geekbench. Why this model is called OnePlus Z is still unknown bu

t because of fact that its leaked spec is of mid range phone we could figure out that its going to be OnePlus X successor. As for a long time they had not announced any mid range phone in the market.

OnePlus Z Specification Summary

According to the leaked reports, OnePlus Z will have a Snapdragon 756G 5G SoC Octacore 1.8 GHz and a 12 GB of RAM and comes with Oxygen OS Android 10. It will be a dual Sim model with 5G capabilities. OnePlus Z is rumored to have a 6.4 inch AMOLED display and runs on 4000 mAh battery. The “Z” will support oneplus proprietary dash or warp charge support.

OnePlus Z spotted in Geekbench listing with Snapdragon 765G
OnePlus Z leaked image Credit mobile91

FULL TECHNICAL SPECIFICATION

ChipsetQualcomm Snapdragon 765G
GraphicsAdreno 620
ProcessorOcta core (2.4 GHz, Single core, Kryo 475 + 2.2 GHz, Single core, Kryo 475 + 1.8 GHz, Hexa Core, Kryo 475)
Architecture64 bit
Ram8 GB
Display TypeAMOLED
Bezelless DisplayYes with punch-hole display
Pixel Density403 ppi
Screen ProtectionCorning Gorilla Glass
Screen Size6.4 inches (16.26 cm)
Refresh Rate90 Hz
Screen Resolution1080 x 2340 pixels
Touch ScreenYes Capacitive Touchscreen, Multi-touch
Internal Memory128 GB
Expandable MemoryNo
Camera SetupSingle
SettingsExposure compensation, ISO control
Camera FeaturesDigital Zoom, Auto Flash, Face detection, Touch to focus
Image Resolution8000 x 6000 Pixels
Main CameraYes 48 MP, Auto focus
AutofocusYes
Shooting ModesContinuos Shooting, High Dynamic Range mode (HDR)
Resolution12 MP Primary Camera
FlashYes LED Flash
User ReplaceableNo
TypeLi-ion
Quick ChargingYes Warp, 30W
Usb TypecYes
Capacity4000 mAh
WifiYes Wi-Fi 802.11, b/g/n
Wifi FeaturesMobile Hotspot
BluetoothYes v5.0
VolteYes
Usb ConnectivityMass storage device, USB charging
Network Support4G (supports Indian bands), 3G, 2G
GpsYes with A-GPS, Glonass
Sim 14G Bands:TD-LTE 2300(band 40) FD-LTE 1800(band 3)3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS:Available EDGE:Available
Sim SizeSIM1: Nano, SIM2: Nano
Sim 24G Bands: TD-LTE 2300(band 40) FD-LTE 1800(band 3)3G Bands: UMTS 1900 / 2100 / 850 / 900 MHz 2G Bands: GSM 1800 / 1900 / 850 / 900 MHz GPRS:Available EDGE:Available
Other SensorsLight sensor, Proximity sensor, Accelerometer, Compass, Gyroscope
Fingerprint Sensor PositionOn-screen
Fingerprint SensorYes
Quick ChargingYes
Operating SystemAndroid v10 (Q)
Fingerprint SensorYes
Audio Jack3.5 mm
Leaked Technical Specification
Oneplus Z spotted in geekbench

Release Date

The upcoming OnePlus Z is rumored to be announced on 17th of June, 2020.

Pricing

The Leaked reports of OnePlus Z shows that it is priced at INR 35000 i.e. NPR 55000.

Large Digital ( L.E.D. ) boards in Nepal

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You might have noticed large digital billboards while travelling to china , US or other developed countries or you might have saw it in some movies. Yeah duh!, you cannot keep your eyes off of it once you notice it. Times square, New York City and China’s capital cities are some of those places where such large billboards are installed but they are not the only place. large display have also been used in TV events and in the live events like concerts, award ceremony etc.

These large displays are not what you call a TV. Large LED boards are kind of different, they are small LED panels (comes in small sizes of 15 X 15 cm or 256mm X 128 mm) which are connected together and the contents are displayed using these units in parallel. Each units has its own power and video in/output ports which can be controlled using an external control chip. Now days the processor board we use for the parallel display comes with its own wireless connection through with we can connect to it and using a software in our laptop or mobile phone we can change the display contents. Previously, this part was a bit hard as we had to program it all.

WHY L.E.D digital display boards?

  • LED lights does not contain any toxic elements like flourescent.
  • Long Life, a single led can be used for up to 75,000 hours.
  • Less heat
  • we can replace a panel or a single led of that panel if it gets damaged
  • Digital signage helps to increase sales.
  • Digital LED display boards are flexible enough and can be used whereever we want. You can change the content whenever you want
  • The digital boards are very interactive and attracts audiences
  • Digital Billboards helps increase sales and uplift revenue
  • Digital board is a way to tell people how technologically friendly your company is

You may have noticed a Large Screen while steering your way through United World Trade Center, Tripureshwor chowk. Isn’t that just mesmerising?. Large screen catches your eyes fast due to the contrast. The LED

United World Trade Center Tripureshwor

This Large Screen was installed by UltraLedDisplay team which is a sister concern of Himalayan Solution the Nepal’s First Electronic and Robotic Goods importer. Ultra Led Display provides different types of LED displays from p2 to p10. The “p” here stands for pixel pitch, whoch is the distance between the center of one led display to another adjoining one. using Digital LED Display boards we can control the brightness, color etc. using a simple software.

Implementing a Simple Calculator using javascript, Html and CSS

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LIVE DEMO

Simple Calculator

KTMBYTES DEMO Calculator





CODE

Here is an implementation of simple calculator using html , css and javascript. We use an onclick method of form to display data in the calculator screen using javascript function.

code from “index.html” file

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="style.css">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Simple Calculator</title>
</head>
<body>

    <h1>Calculator</h1>

    <form id="calid" Name ="cal" action="" >
        <input id="display"name="display" > <br/>
        <input type="button" id ="btn" onclick="cal.display.value+='7'" value="7" >
        <input type="button"  id = "btn1" onclick="cal.display.value+='8'" value="8">
        <input type="button"  id = "btn1" onclick="cal.display.value+='9'" value="9" >
        <input type="button"  id = "btn1" onclick="cal.display.value+='+'" value="+" ><br/>
        <input type="button"  id ="btn" onclick="cal.display.value+='4'" value="4" >
        <input type="button"  id = "btn1" onclick="cal.display.value+='5'" value="5" >
        <input type="button" id = "btn1" onclick="cal.display.value+='6'" value="6" >
        <input type="button" id = "btn1" onclick="cal.display.value+='-'" value="-" ><br/>
        <input type="button"  id ="btn" onclick="cal.display.value+='1'" value="7">
        <input type="button"  id = "btn1"onclick="cal.display.value+='2'" value="8" >
        <input type="button" id = "btn1" onclick="cal.display.value+='3'" value="9" >
        <input type="button" id = "btn1" onclick="cal.display.value+='*'" value="X" > <br/>
        <input type="button" id ="btn" onclick="cal.display.value=''" value="C">
        <input type="button" id = "btn1" onclick="cal.display.value+='0'" value="0" >
        <input type="button"  id = "btn1"onclick="cal.display.value=eval(cal.display.value)" value="=" >
        <input type="button"  id = "btn1"onclick="cal.display.value+='/'" value="&#247; " >
       


    </form>
    
</body>
</html>

code from “style.css”

h1{
    margin-left: 50px;
}

#calid{
    background-color: rgb(32, 194, 194);
    width: 600px; 
    height: 700px;
    margin-left: 50px;
}
#btn{
    width: 100px;
    height: 100px;
    margin-left: 50px;
    margin-right: 25px;
    font-size: 50pt;
    background-color: rgb(255, 255, 255);
    font-weight: 500;
    color: rgb(0, 0, 0);
    margin-top: 20px;

}
#btn1{
    width: 100px;
    height: 100px; 
    margin-right: 25px;
    font-size: 50pt;
    background-color: rgb(255, 255, 255);
    font-weight: 500;
    color: rgb(0, 0, 0);
}
#display{
    width: 500px;
    height: 100px; 
    text-align: right;
    background-color: rgb(15, 110, 122);
    margin: 45px; 
    font-size: 30pt;
    color: rgb(255, 255, 255)

}

Learn for Free – Online Courses with Certificates

COURSERA FREE COURSES WITH CERTIFICATES

Amid the corona virus pandemic “Coursera” an online learning platform launched ‘Coursera Together’ campaign. Many courses on coursera can be access through this campaign for free for a limited time and it also includes the certificate of completion. There are altogether 114 courses altogether that can be accessed freely.

Covid-19 Courses (Epidemiology, Disaster management, Public health etc.)

  1. Psychological First Aid from Johns Hopkins University 
  2. Disaster Preparedness from University of Pittsburgh 
  3. COVID-19: What You Need to Know (CME Eligible) from Osmosis University 
  4. The Challenges of Global Health from Duke University 
  5. Epidemics, Pandemics and Outbreaks from University of Pittsburgh 
  6. Infection Prevention in Nursing Homes from The University of North Carolina at Chapel Hill
  7. Disease Screening in Public Health from University of Geneva
  8. Communicating During Global Emergencies from Emory University 
  9.  Bugs 101: Insect-Human Interactions from University of Alberta 
  10. Essentials of Global Health from Yale University 
  11. Disease Clusters from Johns Hopkins University
  12. Global Health: An Interdisciplinary Overview from University of Geneva

Information Technology, Mathematics, Machine Learning, Science and Engineering Courses

  1. Introduction to Programming with MATLAB from Vanderbilt University 
  2. Mechanics of Materials I: Fundamentals of Stress & Strain and Axial Loading from Georgia Institute of Technology 
  3. Dino 101: Dinosaur Paleobiology from University of Alberta
  4. The Science of the Solar System from California Institute of Technology 
  5. How Things Work: An Introduction to Physics from University of Virginia 
  6. C++ For C Programmers, Part A from University of California, Santa Cruz
  7. Astronomy: Exploring Time and Space from University of Arizona 
  8. Introduction to Sustainability from University of Illinois at Urbana-Champaign
  9. Code Yourself! An Introduction to Programming from University of Edinburgh 
  10. Data Science Math Skills from Duke University 
  11. Introduction to Chemistry: Reactions and Ratios from Duke University 
  12. Cloud Computing Basics (Cloud 101) from LearnQuest 
  13. Getting Started with AWS Machine Learning from Amazon Web Services 
  14. Google Cloud Platform Fundamentals for AWS Professionals from Google Cloud 
  15. Build Your First Android App (Project-Centered Course) from École Centrale Paris 
  16. Robótica from Universidad Nacional Autónoma de México 
  17. Machine Learning for Business Professionals from Google Cloud 
  18. Ecology: Ecosystem Dynamics and Conservation from American Museum of Natural History 
  19. Introduction to Chemistry: Structures and Solutions from Duke University 
  20. Computer Vision Basics from University at Buffalo 
  21. Pre-Calculus from Universitat Autònoma de Barcelona (Autonomous University of Barcelona) 
  22. Introduction to Calculus from The University of Sydney 
  23. Developing AI Applications on Azure from LearnQuest 
  24. Fundamentals of Engineering Exam Review from Georgia Institute of Technology
  25. Exploring Emerging Technologies for Lifelong Learning and Success from University at Buffalo
  26. AWS Computer Vision: Getting Started with GluonCV from Amazon Web Services
  27. Making Architecture from IE Business School
  28. AWS Computer Vision: Getting Started with GluonCV from Amazon Web Services
  29. Industrial IoT on Google Cloud Platform from Google Cloud
  30. Building Conversational Experiences with Dialogflow from Google Cloud

Career Development, Life & Wellness Courses (Skill, Psychology, communication and writing etc. )

  1. Mindshift: Break Through Obstacles to Learning and Discover Your Hidden Potential from McMaster University
  2. A Life of Happiness and Fulfillment from Indian School of Business 
  3. Social Psychology from Wesleyan University 
  4. Introduction to Philosophy from University of Edinburgh 
  5. De-Mystifying Mindfulness from Leiden University 
  6. Psychological First Aid from Johns Hopkins University 
  7. Introductory Human Physiology from Duke University 
  8. Becoming a changemaker: Introduction to Social Innovation from University of Cape Town 
  9. Design: Creation of Artifacts in Society from University of Pennsylvania 
  10. Dog Emotion and Cognition from Duke University 
  11. New Models of Business in Society from University of Virginia 
  12. The Science of Success: What Researchers Know that You Should Know from University of Michigan 
  13. Creative Problem Solving from University of Minnesota 
  14. Sit Less, Get Active from University of Edinburgh 
  15. Animal Behaviour and Welfare from University of Edinburgh 
  16. Big History: Connecting Knowledge from Macquarie University 
  17. Introduction to Personal Branding from University of Virginia 
  18. How to Write a Resume (Project-Centered Course) from State University of New York 
  19. Think Again I: How to Understand Arguments from Duke University 
  20. Personal & Family Financial Planning from University of Florida 
  21. Tricky American English Pronunciation from University of California, Irvine 
  22. The Truth About Cats and Dogs from University of Edinburgh 
  23. Marketing Analytics from University of Virginia 
  24. Successful Career Development from University System of Georgia 
  25. How to Get Skilled: Introduction to Individual Skills Management (Project-Centered Course) from State University of New York 
  26. How to Write and Publish a Scientific Paper (Project-Centered Course) from École Polytechnique 
  27. The Arts and Science of Relationships: Understanding Human Needs from University of Toronto 
  28. Communication Strategies for a Virtual Age from University of Toronto 
  29. Getting Started With Music Theory from Michigan State University 
  30. Science of Exercise from University of Colorado Boulder )
  31. Creative Thinking: Techniques and Tools for Success from Imperial College London 
  32. Healing with the Arts from University of Florida 
  33. Converting Challenges into Opportunities from University of California, San Diego 
  34. The Strategy of Content Marketing from University of California, Davis 
  35. The Language of Design: Form and Meaning from California Institute of the Arts 
  36. Teamwork Skills: Communicating Effectively in Groups from University of Colorado Boulder 
  37. ART of the MOOC: Arte Público y Pedagogía from Duke University
  38. Exploring Emerging Technologies for Lifelong Learning and Success from University at Buffalo

If You have already enrolled in the courses and want to re-enroll. You should first un-enroll to your previous course you have joined and then re-enroll to that course.

You can un-enroll to the courses by following steps:

  1. Log into your Coursera account
  2. Open the list of courses you’re enrolled in by clicking Enrollments on your Coursera home page.
  3. Next to the course you want to unenroll from, click the three dots   to open the menu.
  4. Choose Unenroll Course

ESRI TRAINING FREE COURSES With Certificate of Completion

To avail Free Esri courses you should first create an account on ESRI Training Website then you’ll have the Access to their vast library of free online courses. Some the free courses that are recommended for the ArcGIS users are:

  1. Getting Started with Arc GIS
  2. Modeling COVID-19 in ArcGIS
  3. Arc Map Fundamentals
  4. Suitability Modeling Workflow in Arc Map
  5. Python for Everyone

Coursera Guided projects (Free until June 12th 2020)

  1. Logistic Regression with NumPy and Python
  2. RESTful API with HTTP and JavaScript
  3. Basic image Classification using tensorflow
  4. Build a Linear Layout App in Android Studio
  5. Predict Diabetes with a Random Forest using R
  6. Web App Security Testing with Burp Suit

Become Google Certified Digital marketer

  1. Get certified in the Fundamentals of Digital Marketing

All about Raspberry Pi and its New Release “Raspberry Pi 4 8GB” variant – Tech specifications and Pricing.

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Raspberry Pi is a small sized, low cost and power efficient single board computer, with the capability of a high priced desktop computers. You can plugin your mouse, keyboard and a TV or computer screen and you are ready to go. Raspberry Pi is a mobile computer which you can fit in your pocket like your mobile does. It has a processor, RAM, ethernet ports, input and output ports for display (mini HDMI port), keyboard and mouse (USB ports) and power supply port (USB). All-in-all its a complete CPU package. You can install any operating System and use it on-the-go. Because of the powerful processor built-in to its system you can browser web pages, watch HD videos, code and do what you do in your normal computers.

Raspberry Pi is also used as a programmable brain that can interact with the data collected the real world using the sensors and then process it , analyse it or transmit it using internet. It is used all around the world in meteorological departments to log and analyse data. You can choose from range of operating systems to use Raspberry PI. Although, Raspberry Pi has their own flavor of OS you can choose to use.

Raspberry Pi was first release on 24th Feb 2012. Since then it has released five major products in the market and by the year 2019 RP became UK’s top selling single board computer.

Products of Raspberry Pi foundation

Raspberry Pi 4

Raspberry Pi released RP4 with 8 Gigs of RAM on 28th of May 2020. RP4 with 2G, and 4G RAM models were already released in 2019. There is no much of a change in RP’s new release expect for the increase in main memory and the change in the location of usb type-C power supply port. After the announce ment of RP4 8 GB variant new Raspbian OS with 64 bit support was released. Which makes the RP4 harness the 8 Gigs of RAM more efficiently. With Raspberry 4 you can have dual 4k display.

Detail In/Out ports of Raspberry Pi 4

Technical Specification of Rasberry Pi 4

CPU  Broadcom BCM2711, Quad core Cortex-A72 (ARM v8) 64-bit SoC @ 1.5GHz 
RAM  2GB, 4GB or 8GB LPDDR4-3200 SDRAM (depending on model) 
WIFI / Bluetooth  2.4 GHz and 5.0 GHz IEEE 802.11ac wireless, Bluetooth 5.0, BLE 
ETHERNET  – Gigabit Ethernet 
PORTS          2 USB 3.0 ports; 2 USB 2.0 ports.Raspberry Pi standard 40 pin GPIO header (fully backwards compatible with previous boards)2 × micro-HDMI ports (up to 4kp60 supported)2-lane MIPI DSI display port2-lane MIPI CSI camera port4-pole stereo audio and composite video port
VIDEO  H.265 (4kp60 decode), H264 (1080p60 decode, 1080p30 encode)OpenGL ES 3.0 graphics
Micro SD slotMicro-SD card slot for loading operating system and data storage
POWER SUPPLY    5V DC via USB-C connector (minimum 3A*)5V DC via GPIO header (minimum 3A*)Power over Ethernet (PoE) enabled (requires separate PoE HAT)
Operating TempOperating temperature: 0 – 50 degrees C ambient
technical Specification of Raspberrry Pi 4

Pricing

Raspberry Pi 4 Pricing List

Modelin USD
RP4 2 GB Model 35
RP4 4 GB Model 55
RP4 8 GB Model 75
Raspberry Pi Price List

Availability of Raspberry Pi 4 in Nepal

Till date there are no authorized sellers of RP in Nepal but can be found in different retail electronic stores sold independently. Himalayan solution is one of the electronic sellers in Nepal who imports electronic and robotic goods. Himalayan solution provides previos models of RP in discounted amount to engineering students in Nepal. Due to Covid-19 situation it may take a while to import RP4 models but stay tuned with them .

Important Features in Android 11 you need to know beforehand

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Google releases updates to its Linux based Mobile OS every year in October or September. Android 10 was android’s 10 edition to its mobile based operating system, preliminary named “Android Q“. Android 10 released in the year 2019 with lots of improvement in the UI and features. Features like live caption smart reply, sound amplifier, Gesture navigation, Dark Theme, privacy Controls, Location Controls, Security Updates , Family link, Focus mode was added to the stock Android 10.

This year Android 11 promises many features which seems to include the features demanded by the Android fan base. The first android 11 Developer Preview was released in February 2019 and since then two updates, preview 2 (march) and preview 3 (April 24) have been dropped. The preview – 3 gives us an overview of Android 11. We’ll be discussing about some important features added to the Android 11. The Android -11 beta 1 is scheduled to be released on this month i.e. May 2020.

Built-in Screen Recording :

Native screen recorder Android 11 feature

Good news for all techies, bloggers and social media enthusiast who needs to use screen recording apps for their contents and blogs, Android -11 comes with a built in Screen recording app. Even though there are many third party screen recording app in the market, having a native one is a plus.

Context-aware dark mode : 

Android 11 Dark mode scheduling

Although system-wide dark mode was released on Android 10, Android 11 comes with a new feature which lets user get most out of both lite and dark mode by Auto switching from lite to dark or vice-versa according to the time of the day. Samsung already have integrated this feature in its custom ROM’s but now its officially available in the final release of Android 11.

Auto revoke app permissions

Android 11 automatically cancels permissions from apps that haven’t been used for a certain amount of time. This new setting is very handy if you think you’re not going to be using an app after a some time.

Chat Bubbles

Bubble feature Android Q

Chat bubbles to be implemented in Android 11 final release. Chat bubble enables multi tasking and interacting with the app without needing to close the current app. Messenger like bubble will appear for all of your favorite chatting app if the chat bubble is enabled.

android 11 chat bubbles 1

Increase touch sensitivity: 

Android 11 will come with ‘increase touch sensitivity’ option which lets you increase the sensitivity of the touch screen. This feature will come in handy if you use thick screen protectors.

Airplane mode doesn’t Switch Bluetooth Off:

Nowadays people are using Bluetooth a lot more than the past, when Bluetooth was just used for file transfers.With Bluetooth 5 update and Qualcomm audio standardization Bluetooth’s use is now multipurpose. Bluetooth is now used in paying bills, lossless music, file transfer, audio sharing etc. Therefore, because of its wide usage, Android 11 update does not kill the Bluetooth even when you are in Airplane mode.