innovation

                                                       Who says indià doesn't innovate???

philips IC Factory!!

                                 PHILIPS IC MANUFACTURING PROCESS

IC manufacturing is a complex process. their is list to perform the IC fabrication which is listed below.

steps for IC fabrication.

    Lithography: The process for pattern definition by applying thin uniform layer of viscous liquid (photo-resist) on the wafer surface. The photo-resist is hardened by baking and than selectively removed by projection of light through a reticle containing mask information.

    Etching: Selectively removing unwanted material from the surface of the wafer. The pattern of the photo-resist is transferred to the wafer by means of etching agents.

    Deposition: Films of the various materials are applied on the wafer. For this purpose mostly two kind of processes are used, physical vapor deposition (PVD) and chemical vapor deposition (CVD).

    Chemical Mechanical Polishing: A planarization technique by applying a chemical slurry with etchant agents to the wafer surface.

    Oxidation: In the oxidation process oxygen (dry oxidation) or H$ _2$O (wet oxidation) molecules convert silicon layers on top of the wafer to silicon dioxide.
    Ion Implantation: Most widely used technique to introduce dopant impurities into semiconductor. The ionized particles are accelerated through an electrical field and targeted at the semiconductor wafer.


    Diffusion: A diffusion step following ion implantation is used to anneal bombardment-induced lattice defects.

projects!!

Electronic Notice Board with Android Remote Controller | ECE Projects 

Arduino Home Security System

 

projects websites!!

Websites for projects!!!

1.www.electroschematics.com/

2.electronicsproject.org/

3.www.electronicsforu.com/

4.www.electronics-lab.com/

5.www.electronics-project-design.com/

6.www.circuit-projects.com/

7.www.eleccircuit.com/

8.www.electronic-circuits-diagrams.com/

9.www.circuitstoday.com/

10.circuiteasy.com/

11.www.electronicshub.org/

12.www.open-electronics.org/

13.littlebits.cc/projects           

what are mobile towers ?

Mobile Towers.






 Cell phone towers are structures built on specific parcels of land that are designed to accommodate wireless tenants. Wireless tenants utilize cell towers to deploy various technologies to a subscriber base, such as telephony, mobile data, television and radio. Cell towers are typically built by tower companies or wireless carriers

PSTN-public switch telephone network.
MSC-mobile switching center.
BS-base station.

The Microwave Dish is a large round antenna, which is used for a specific type of transmission, and also commonly used for backhaul.backhaul portion of the network comprises the intermediate links between the core network, or backbone network and the small subnetworks at the "edge".

The Base Transmitter Station or BTS is a shelter or enclosed area used to house and protect communications, radio and network equipment.

The Generator is powered by gas or diesel and used as emergency back-up to keep cell sites operational during power outages.

Utilities are also necessary for the operation of cell sites. Wireless carriers will run lines or cables to the site to complement their specific technology

 

                                                How healthy are Mobile Towers?

People say that by having a mobile tower near to our house can cause cancer. Is it really so?

Some of the most powerful cell tower installations are on mountains and hilltops outside of urban areas. These EM fields have impacted humans, animals as well as the ecological balance. Studies of people and farm animals living around high voltage wires point to extreme hazards of living up up-close to a powerful electromagnetic field (EMF) - exhibiting everything from stress and sleep disorders to birth defects, cancer and Alzheimer’s. All cell site exposure risks.

These image will tell you what kind of EM are harmful . 

 Our body also resonates with earths magnetic field at 10Hz.

kernel

kernel

When say about KERNEL we have seen it in our mobile phones. when we get into our settings-about phone. In that under the android version their is the KERNEL version so what is KERNEL.

Kernel basically manages the i/o. Kernel is basically a main part of operating system likewise the system has many device drivers like camera,network,touchscreen etc this is manage by the kernel.
It allows the application or we can say it as a software communicate with the hardware.

As the above diagram shows whats the main work of the kernel

Some of process done by the KERNEL;-

virtual memory-

when the RAM is full or their is no storage space in RAM the data of that application is stored in the hard disk 

Multi-tasking-

Kernel is responsible for multitasking. It takes the decision of how much processes must run at a time 

File system-

The distribution of the file in the hard disk is done by the kernel.the process which needs data from the memory is given by the kernel.

Modes-

Their are two modes kernel and user mode mainly these modes helps us not getting into Deadlock(deadlock is a situation in which two or more competing actions are each waiting for the other to finish, and thus neither ever does.)

Program execution-

                              Kernel decide how much processes must run at a time and gives the program the required data from the file system.

If you want to know more about your mobile their is a application which allows you to know about the performance of your mobile phone your processor,benchmark also.

cpu/ram/device identifier

ARM processors.

ARM

ARM is a processor based on RISC (REDUCE INSTRUCTION SET COMPUTING).


ARM is a British company. RISC help them to reduce cost,heat,battery usage. By this all usage ARM is used in embedded systema.

This is the list of ARM processors based on performance and capability.

First ARMv7 was announced in the year 1994 and now the newest is cortex A-72 or ARMv15.

https://web.eecs.umich.edu/~prabal/teaching/eecs373-f10/readings/ARMv7-M_ARM.pdf

This link is for full details of ARMv7 processor with achitecture.