Showing posts with label Radio Frequency. Show all posts
Showing posts with label Radio Frequency. Show all posts

Sunday, 23 September 2018

How to make money online Pakistan



Now a days Pakistan is emerging country in the field of IT. IT is directly relate to the making money through online. In Pakistan a number of people want to work in spear time as well as a full time. Online working is not a harder task when you have a good skills, knowledge, guidance and commitment for you work.
In Pakistan a lot of method are in market through which we can earn money online like freelancing, online shopping stores, blogging, websites, YouTube, mobile apps and other a lot of services you can provide to make money online. Here we explain some of these method to work online.
Freelancing is the one of the best and trusted source of income. It’s quite simple and depend upon your skills. If you have a specific skill go to the freelancing websites like Fiver, Envato studio, Upwork, Presto Experts and many more. Work on these websites is not a rocket science it’s quite simple. For example you a have good technical Knowledge about a specific Engineering field and you can solves the others problems just go the website put their info about your skills after that needy people contact with you by self. When you get some work and accept the client offer (amount) the decides money move in the third party account. When you complete your task it move in your bank account or reach it to you by other ways.
Online shopping store is the innovation in business field. A Few decade ago you cannot sell your product even a whole country. Now if someone want sell their product in whole world online shopping make it easier without tension of delivery of product as well as collect the price of sell product. Make a website like Draz.pk, Alibaba and Amazon show your product to the world sell and make money.
Blogging is related to the writing skills. It’s a kind of website here you have to write on your interesting topic that other’s like and enjoy. If your post and writing contact not a copy past and unique then Google AdSense give you permission to show add on your blog and when readers read your article adds show automatically through this you can earn revenue.
Website, YouTube and other mobile application have same working phenomena. A programmer built a website or mobile application and upload to the Google paly store or I cloud. When someone download it to use adds shows him and revenue goes in the owner account.
 A lot of many more way to work and earn online in Pakistan but these are the most famous and trending method.


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Friday, 18 May 2018

Is the WIRELESS Electricity is the Future ? See How the Wireless Charger Works on Principle




Inductive Charger / Wireless Charger

Michal Faradays discoveries the underlying principles of electromagnetic induction he discover that
in the presence of alternating electromagnetic field emf produces along the conductor.









  By the late 1894


Tesla used that idea and demonstrated the phenomena resonant electro coupling by lighting the incandescent lamp by tuning the current resonant frequency of the coil the two coil are join for higher
efficiency power transfer.




The discovery let to the modern electric motor and other  measurable invention however the inductive charging the science proof easier than implementation at the start won’t many electronic that greatly benefits such technology for the days of Tesla and due to limitation of circuit board design and size it was up to until 1999 and 2000 technology development for consumer level and we started seeing wireless electric tooth brushes and 2008 wireless charging mobile phone .

Inductive charger consist of few pads
Alternating current for watt and electronic oscillator circuit and transmission coil. The Transmission  base in thing like number of turn on wire diameter of coil the distance from the coil and other properties such a current.
coil is the tightly wound the copper element as a alternating current passes true to produce the magnetic flux that magnetic flux density



Under receiver end the processes is basically same expect opposite  On the receiver side Same type is embedded in the charging circuit the alternating magnetic field is picked up by the receiving coil the current is induced the AC power is passing through power rectifier stabilizer to convert the DC power phone  can use to charge the battery both the transmitter and receiver have electrical resonant frequency designed to be the same for low displacement distances such as a mobile  phone on charging  pad it is actually less efficient to  operate circuit resonant  frequency to generation









However for large displacement such a car park on charging pad operating at resonant frequency causes inductive coupling to counter act some displacement related transmission losses there are many other factor that fact on the performance there is no standard design on phone at yet charging pad needs way to detect to the type of devices that’s it is charging and Have of multiple coil arrangement.


A team of Engineers is working on advancement of charger that can charge up to 4 devices at a time and it will be completely safe.

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Monday, 2 April 2018

Near field Radio Frequency Identification Technologies


This category depends upon the faraday’s principle of magnetic induction for the process of the coupling between the single reader and the series of tag. As a reader is able to pass a large amount of alternating current from the cross section of the reading coil. This also results varying the alternating magnetic field relatively in its cross section locality. When a tag is placed who's cross sectional are is small relatively  and also the smaller coil then the alternating voltage is induced  across it terminal. When this induced voltage is processed through rectification process and is connected to a capacitor bank then a large reservoir of the charge is accumulated through it. which is used to provide the power to the series of tag chip.

Series of tags which use near field coupling transfer the data to the previous  reader with the help of  using load modulation method. As all the current which is drawn through the series of tag coil gradually will provides the increment in poor  magnetic field. This poor magnetic field opposes the main advanced reader’s series of field. The testing coil can predicts this at a small incremental of current which is passing from it. This passing current is directly proportional to the combined. The principle used for this purpose is same as used for that of power transformers.

 As in the transformer effect the primary and secondary coils are connected magnetically not electrically. When the magnetic field through the primary winding increase through specific level then the secondary winding acquires this magnetic field. And it behaves the same role as the tag for the reader. The reader monitors this signal and recovers it. This recovering is done by changing the value of the current. Different types of modulation encodings are established which are based at the complete number series of registers and of ID bits.
Near-field coupling is completely a best technique to implementing practically a number of passive radio frequency identification system. With its advantages the narrow field also has some disadvantages and restrictions. The periodic range used  for  this purpose is approximately c/2πf. In this periodic approximation c shows a constant value which is also called  speed of light. Where f represents  the frequency. So when the frequency of increases automatically then the measuring distance decreases upon which the field coupling is depending.
 Moreover a specific limitation is required for the energy which is existing as the induction. This induction is the function of distance. It is connected with the reader coil. In this case the dropping factor for the magnetic field is near 1/r3. In this factor the r is representing the value of distance between or the separation of the tag and the reader. It is along the direction of center line. This center line is mutually perpendicular to plane of coil. In this case more ID bits are also required.



By the way the near field radio frequency communication system also has some restrictions and limitations physically. For this purpose the range used is near about c/2πf and it has magnetic effect.
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