Giveaway results!!!

Hello guys,

We are happy to announce winner of our first giveaway!

For those who didn’t win this time , we promise you will get many more opportunities like this with better products and more quantity! Just keep reading and following us to stay updated with our new blogs and giveaway information!

WINNER:

Winner for this giveaway is Tuhin das! Congratulations to the winner!

You can now select any earphone mentioned on the website and it will be delivered to you! Thanks for participating!

Further details will be sent to you on your email id. For more information email us at neotechsters@gmail.com

Hello guys, We are happy to announce winner of our first giveaway! For those who didn't win this time , we promise you will get many more… Read more "Giveaway results!!!"

Let’s code in python !!!

Now that you have python installed in your systems we are all set to start programming in python.

So let’s begin !

In order to write a program/code you need an editor/IDE[Integrated Development Environment] to write on . So we will be using the python IDLE for now and later on we will switch to a better IDE where we will discuss the need to shift to a different IDE.

Today our aim is to get introduced to programming in python.So first of all open the python IDLE. Just search for IDLE and open the first option itself,

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So this is the python shell where you can directly execute python commands.So let’s get started with the first python command.

We will first see how to print a statement in python. Type the command print (“your statement”) and press enter.The statement you wished to print is displayed. This is illustrated below.

1

If you have used C or Java before you might know to assign a value to a variable ,you will have to define the variable type first and then assign a value to it.But in python you directly say a=2  and python understands the data type by itself

 

3

So this shows why python is so easy to use.you don’t have to worry about variable declaration and neither semicolons. In C/C++ , semicolons are must after every statement whereas in python it is not required.

So I hope now you have got an idea of why python is easy.

Next time we will cover the conditional and loop statements in python.

 

Now that you have python installed in your systems we are all set to start programming in python. So let's begin ! In order to write a… Read more "Let’s code in python !!!"

Fortnite on android! Download now!!

Are you a gaming freak! Do you love playing android games? And ofcourse you are a fan of pubg! Well then we have another game that can bring some virtual adventure in your life! Yes you guessed it right! It’s fortnite!

Fortnite was first launched as Samsung exclusive,alongside the note 9.It is not available on playstore till now.

Until now you needed an invite to get this game which unfortunately took a lot of time.But Epic has announced on Twitter that it has removed this barrier and now the game can be easily downloaded by scanning a QR code on the site.

Click on this link to know more

https://www.epicgames.com/fortnite/en-US/mobile/android/get-started

You have to allow apps to be downloaded from external sources. No need to panic, just allow it and you are ready to go. This link is of the official site so you need not worry about malwares. However if you are concerned about your security then probably you will have to wait for fortnite launch on Google Play Store.

List of compatible devices is available here:

https://www.epicgames.com/fortnite/en-US/mobile/android/new-device

Know more about fortnite in FAQ section :

https://www.epicgames.com/fortnite/en-US/faq#android

Do comment and let us know whether fortnite can defeat pubg in this battlefield!

Are you a gaming freak! Do you love playing android games? And ofcourse you are a fan of pubg! Well then we have another game that can… Read more "Fortnite on android! Download now!!"

Getting Started with Python

Let’s get started with the installation of python !

You can check if your system already has python installed by typing the command python in your command prompt or terminal.It should display the version of python installed if python is installed an else it will throw out an error.

In order to open your command prompt , type cmd in your windows search bar aand click on command prompt.

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If you don’t have python installed in your system then  follow these steps to get it installed.

WINDOWS USERS : 

Follow these simple steps to install python

  1. You can download python from the following link  https://www.python.org/downloads/windows/
  2. Choose the version of python you want.Latest version is what I would recommend.
  3. Then just run the file and follow the installation instructions with  default settings.Make sure you check the  “Add Python 3.7 to PATH” checkbox and click on “Install Now”python
  4. After installation verify by typing python in the command prompt and it should give you the version of python installed.

UNIX and LINUX :

Here are the simple steps to install Python on Unix/Linux machine.

  • Open a Web browser and go to https://www.python.org/downloads/.
  • Follow the link to download zipped source code available for Unix/Linux.
  • Download and extract files.
  • Editing the Modules/Setup file if you want to customize some options.
  • run ./configure script
  • make
  • make install

MAC USERS :

You need to go to the website https://www.python.org/downloads/release/python-361/ and download the Python installer:

  • Download the Mac OS X 64-bit/32-bit installer file,
  • Double click python-3.6.1-macosx10.6.pkg to run the installer.

 

Now you are ready to get started with python. In the next session we will discuss about the basic syntax in python which will make you realize why python is easy to learn.

 

 

Let's get started with the installation of python ! You can check if your system already has python installed by typing the command python in your command… Read more "Getting Started with Python"

Introduction

Hey guys !!

We are starting a new course on our website – Python. Python is gaining a lot of importance and popularity these days. Python has even been introduced to schools now. Such is the popularity of Python. So if you are a programmer or if you want to learn programming it is best to learn Python .It is one of the most easiest and interesting programming language till date.

Why learn Python ?

As mentioned earlier it is easy to learn and it is fun learning Python.Other than that  if you look in to the applications of Python you will be overwhelmed and will definitely love to start learning Python. So here are some fields where Python is used.

1.Machine learning

2. Web development

3. Data Science

4. Artificial Intelligence

And many more.

What to expect from the course ?

The Course will start with the basics of Python . So if you are a beginner then this course is for you . All basic syntax will be covered in the initial part. Later on the focus will be  more on an application oriented approach. Python with Anaconda will be covered in the latter part of the course . Now you need not worry about what Anaconda is . It will be explained later on.

Our course will focus more on data science using Anaconda. So at the end of the course you will have a proper overview of data science and how to use Python to make several applications like Chat bots.

So it’s going to be an interesting journey and we assure you that you will love it.

Hey guys !! We are starting a new course on our website - Python. Python is gaining a lot of importance and popularity these days. Python has… Read more "Introduction"

(Giveaway!!) Best earphones under 1000₹

Choosing an earphone can be really difficult! There are so many options available that you are sure to get confused.You end up selecting an earphone on basis of reviews you see online, but later you find that it doesn’t match your taste of music! It simply doesn’t deliver what you want!. So,to simplify things for you we have presented 10 earphones that might match your requirement.Lets begin the countdown!

TO KNOW ABOUT GIVEAWAY CLICK HERE:https://neotechsters.com/2018/10//giveaway/

10.Philips SHE1405BK/94:

Click on the image to buy!

Looking for a good quality earphone under 350? Then this one is for you.At this price this earphone clearly make a way in our list.With a decent sound quality and good build quality this earphone gets a position of number 10 in the list.

9. Brainwavz

Click on the image to buy!

Cost of this product is 999 INR with build quality of around 600 INR.SO overall its an average product.But yes it has a great sound quality which compels us to put it in our list.Sound quality is better than few products in this price segment.

8. Audio-Technica ATH-CLR100BK

Click on the image to buy!

Audio Technica is also one of the leading companies in this field.It has rich audio quality with slightly compromised build quality.

Pros:

  1. Cheap
  2. Great audio quality.
  3. Clear sound.

Cons:

  1. Average build quality
  2. Not great for rough use but it might survive.

7. JBL C100SI

Click on the image to buy!

If you want a light and comfortable earphones then this is the one for you.JBL always offers a great sound quality with good build quality and this is also not an exception.In this price segment JBL earphones are the lightest and can be used for a long period of time without causing pain in ears.

Pros:

  1. Good build quality
  2. Great sound
  3. Good noise cancellation
  4. Light in weight
  5. Comfortable

Cons:

  1. Not ideal for rough use
  2. Bass is slightly less compared to some others in this segment.

6. Sennheiser CX 180

Click on the image to buy!

Sennheiser doesn’t need an introduction.Its already a beast in this field. CX180 is a great product if you use earphones roughly or for sports use.With a warranty of 2 years it defeats everyone in the line!

Pros:

  1. Excellent build quality.
  2. 2 years Warranty
  3. Great service
  4. Clear voice

Cons:

  1. Wire can get tangled easily!
  2. Bass is almost absent.Hence useful for watching movies or YouTube videos maybe.Definitely not for music lovers!

5.Mi earphones with mic (Black):

Click on the image to buy!

Xiaomi fans, wait is over!! Next in our list is Mi earphones with mic.This earphone is ideal for you if you are looking for an affordable earphone with above average sound quality and a good build quality.We wont say that it has an awesome sound quality but for the price you are paying its a pretty decent product.

Pros:

  1. Mic available
  2. Cheap
  3. Tangle free and strong cable.
  4. light in weight
  5. Volume adjustment, play/pause options, call end feature available!

Cons:

  1. Mic can get detached if mishandled.I experienced this in mumbai local!!
  2. Ear starts paining if you use it for more than one hour (This is a personal choice)

Another version of MI earphone is present on amazon at just 399 INR.

Click on the image to buy!

4. 1 More Piston fit earphone with mic

Click on the image to buy!

Even though 1 More is new to this field it has amazed us! In a very short period of time it has gained a lot of popularity! This is an excellent combination of good build quality and sound quality.Hence it stands 4th in our list.

Pros:

  1. Bass is good
  2. Sound quality is decent.
  3. Mic is available
  4. Mic is firmly attached.

Cons:

  1. Ear starts paining after some time (1hour approximately)
  2. Heavy

3. Boat Basshead:

Click on the image to buy!

Price to quality ratio is best for this earphone.Hence it stands 3rd in our list.With excellent bass and clear sound quality this earphone wins your heart and the credit goes to its low cost.

Pros:

  1. Excellent bass
  2. Clear sound
  3. Mic availbale
  4. Cheap
  5. Good noise cancellation

Cons:

  1. Ear can start paining after an hour.
  2. Microphone can get damaged.Not good for sports or rough use!
  3. Slightly heavy.

2. MDR-AS210AQP

Click on the image to buy!

Do you love listening music at gym or maybe during cycling, running or any other sports activity??? Then this earphone is just for you !!

Pros:

  1. Good build quality
  2. Light in weight
  3. You can use it for longer time (Thanks to its design)
  4. Good quality wire.

Cons:

  1. Average sound quality’
  2. No mic
  3. Wire is not tangle free

To buy a mic version of it click here.

Click on the image to buy!

1. Sony MDR -EX150AP

Click on the image to buy!

Sony MDR-EX150 deserves to be at the top of this countdown! This one is purely for music lovers! Sony MDR-EX150AP would never stop amazing you. It is an earphone with most balanced sound in this price range.This earphone wont provide you with too much bass ( can be disappointing for some) but it will provide you more natural and balanced voice as compared to other earphones in this segment.So in short this one is not really for extra bass lovers!

Pros:

  1. Best sound in this range
  2. Good build quality.
  3. Comes with a mic
  4. Light weight and comfortable

Cons:

  1. Not really good for sports.

Choosing an earphone can be really difficult! There are so many options available that you are sure to get confused.You end up selecting an earphone on basis… Read more "(Giveaway!!) Best earphones under 1000₹"

What’s inside a phone charger ?

Have you ever wondered what inside a charger that gives our phone the power to sustain a day or longer.

Keep reading fellas as we will be exploring the phone charger today.

Here is the block diagram of the most basic type of a charger circuit.

CHARGER.PNG

The input to the charger is 220V AC VOLTAGE . But the phone batteries are rated at 5V .So there is a need to bring down the 220V to a lower voltage. This is done using a step down transformer.

STEP DOWN TRANSFORMER : Step down transformers converts the 220V AC to a lower AC voltage.The lower voltage depends on the transformer being used. The transformer is selected based on the voltage and current ratings of the load

RECTIFIER : The output of the transformer is AC. But the cell phone batteries need DC supply. So the AC needs to be converted into DC and that is done by a circuit called rectifier. Rectifier is basically diodes connected together such that it converts the AC into pulsating DC signal. The output of the Rectifier is not pure DC. It is pulsating i.e it contains ripples that needs to be removed.

FILTER : Filter circuit is used to remove the ripples from the DC signal. It usually involves capacitors. Capacitors bypasses the DC signal and blocks the AC signal .So we get a DC signal without ripples at the output.

REGULATOR : As the name suggests it is used to regulate the output voltage. The input to battery shouldn’t be fluctuating . It should be a steady DC supply which is ensured by the regulator. The output of the regulator is then fed to the phone using a USB or any other type of connector.

So this is whats inside a charger. Well this isn’t enough to charge a phone battery .There are different circuits to ensure proper and safe charging of the batteries. All those will be discussed in detail in the next blog .

Have you ever wondered what inside a charger that gives our phone the power to sustain a day or longer. Keep reading fellas as we will be… Read more "What’s inside a phone charger ?"

Catenary wire (Part 1)

In OHE, i.e Over Head Electrification systems, electricity is provided through an overhead system of suspended cables.In such a system you can see two wires as shown in the image below.

In the first set of images you can see pantograph .In the second set you can see contact and messenger wire and in the third set you can see Dropper or spacers.

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Pantograph used in Railways
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Contact wire and messenger wire.
Capture2
Dropper or spacers.

Getting the basics:

Let us understand each component one by one.

  1. Pantograph: A pantograph is used to make contact with overhead contact cable.It can be raised or lowered mechanically to make contact with the contact wire.This pentograph supplies power to motor through transformer .
  2. Contact wire: It carries the current and remains in contact with the pantograph.A contact wire is suspended from other wire above it which ensures that the wire is at a constant distance from pantograph.If this is not done then sagging of wire can lead to variation in the distance between pantograph and contact wire which can lead to breaking of contact wire.Hence this Catenary system is used.
  3. Messenger wire: Contact wire is suspended from another wire called as messenger wire.This wire has a shape of Catenary i.e hyperbolic cosine curve shape. Hence this system has a name of Catenary system.
  4. Dropper: Also called spacers these wires are present at regular intervals which maintains the shape of contact wire.

Getting Involved:

Let us now get into some detail of catenary system.

Capture3

This image is from Mumbai (India). As you can see that there is a contact wire and Messenger wire. Here you can see that Messenger wire has a sag or its forming a catenary shape ( In easy words a stretched ‘U” shape).

Now just imagine a pantograph in contact with messenger wire! Due to the variation in height two possible situations can occur:

  • Wire will break due to excess tension.
  • Contact between pantograph and Wire can break.

We don’t want either situation to occur. To prevent this we hold the contact wire from messenger wire with Dropper of different length ( You can observe different length of Dropper wire in the above image).

Why Not just stretch the wire???

You might be thinking why we cannot just stretch the wire till it get straight !.Well theoretically its possible to straighten the wire but cant be done practically.Here are a few reasons behind it:

  • Wind and effect of temperature requires some flexibility.Wind can cause wire to move which can break it if it is fully stretched. Moreover Wire expands due to heat which again requires flexibility!! Have you ever seen a structure as shown in the image below?? Well that structure is used as a counter weight to compensate for change in length due to thermal expansion. If this structure is not present it can lead to breaking of wire due to expansion or contraction.

Capture4

  • Also a train never moves straight.It takes turns, experiences jerks and when the train is crowded then the jerks are even severe.In India, especially in mumbai where local train is the lifeline and experiences heavy crowd it is important that the wire doesn’t break due to jerks.Pantograph here plays an important role.It adjust itself with jerks within required limits.Here if wire is fully stretched these jerks will break it!! Catenary system provides required flexibility due to droppers and hence prevents breaking of contact wire.

In OHE various types of Pantographs are used.This will be explained in a separate blog.Link will be provided here.

Hope you liked this post! Do comment share and let others know about this!

Keep reading !

In OHE, i.e Over Head Electrification systems, electricity is provided through an overhead system of suspended cables.In such a system you can see two wires as shown… Read more "Catenary wire (Part 1)"