Electronics

Learning Electrical Engineering by yourself is much better than going to school, because you can choose the books and style of learning that you want. The most difficult part is finding out what works for you. I taught myself electrical engineering and now work in a firm as an electrical designer, and I am now on my way to getting my PE License. For me the most difficult part was teaching myself the mathematics and physics. It took me a long time to find the right way to learn these subjects on my own, but once I figured it out, I flew through the learning process, and was able to get my first job. I used these 2 books: Engineering Mathematics, and Advanced Engineering Mathematics by K.A. Stroud. These books teach you all the mathematics and physics that you could ever need, and they use a programmed approach to teaching that make it somehow painless to learn even the most complex subjects.

Now you have to learn how to apply your new found mathematical skills, which really you can do anything with, but since you want to go into Electrical Engineering I advise that you get the most basic easy to understand book about electricity ever written, Basic Electricity by Van Valkenburgh. After you have a good grasp of this book you should be ready to decide what specific area of electrical engineering you want to go into. Electrical Engineering is a very large field, but as long as you have a grasp on the mathematics and physics involved you should be able to go into any area you want. There are two major categories to choose from, Electronics or Electrical Engineering. Electronics is concerned with small circuits often found in modern technology. Electrical engineering is concerned with much bigger things like power supply, and distribution, and electrical infrastructure.

The next thing you need to do is start applying for internships or any kind of job at an engineering firm. If you can prove that you know the mathematics and have a grasp on electricity, you should be able to get your foot in the door some how. Once you are in you have to work under a licensed PE for 3 years, and then you will be eligible to take the Fundamentals of Engineering exam, which you should be able to pass as long as you have kept learning for those 3 years. Then a few years later, forgot exactly how many more, you will be eligible for the PE exam. Once you pass this exam you will be a Licensed professional engineer.

Seems like a long road, but even if you go to school, you still have to take the FE exam, and the PE exam. Becoming an engineer in general takes a long time, and takes a lot of passion. I got there this way, and would recommend it over school, because you start getting professional experience sooner, and you avoid a lot of useless classes and fees.

A good way to gauge your progress is to look up the FE exam requirements and see what you need to know.

One example might be in a warehouse where the robots follow 'tracks' to and from the shelves they stock and retrieve from.

color coding of resistor:black,brown,red,orange,yellow,green,blue,voilet,grey,white

these colors are ranked as:0,1,2,3,4,5,6,7,8,9

tolerance:silver,gold,no color

ratings:5%,10%,20%

If you really work hard every course has a good scope.

latest technology in communication slide should be 4G and 6th sense technology.

No, Terminal voltage of a battery can't be zero. For example, if my mobile's battery is at low charge. It is showing only one point of charge on screen, but there will be no fluctuation on its screen, all the other features like audio, video, display will remain same unless it will become fully out of charge. Charge could be zero but the voltage can't be zero.

Well, actually the terminal voltage of a battery can be zero, but only when the battery is totally dead and unable to take a charge (if it was a rechargeable type battery). At this point it must be disposed of.

One exception is wet cell batteries (like lead acid), if the liquid electrolyte is removed the terminal voltage goes to zero but the battery is still good and can be restored to normal operation by refilling it with electrolyte. In fact wet cell batteries are often sold fully charged but with no electrolyte and their terminal voltage is thus zero on the store shelf until the salesman fills them with electrolyte.

1. heat. If it's hot enough, blackbody radiation (e.g. incandescent light bulb)

2. Electromagnetic radiation (radio waves, magnetic or electric coupling to adjacent conductors) if the current is changing.

5v

A: Each IC has unique operating parameters never the less it require instruments. A VOM can solve some problems but never all of them. For instance an amplifier oscillation it may Lock like a bad part but there is nothing wrong with the component if the oscillation is stopped. An oscilloscope can display the problem visually and it can be fixed, The oscilloscope may display the problems but interpreting the display is an art by itself.

Leaving a receptacle energized will not consume power, some things left plugged in while not in use will consume power.

Plasma is a state of matter in the same way that solids, liquids and gases are also states of matter. Plasma is found in fluorescent light bulbs and is used to generate images in a plasma television. So, a television has the same kind of plasma as a light bulb but applied in different ways.

Different methods for different circuits. In a simple RC filter with a series R and shunt C, the time-constant T is equal to RC. The cutoff frequency is given by 1/(2.pi.T).

So with 1 k-ohm and 0.1 uF the time-constant is 1000 x 1E-7 or 100 microseconds, so the cutoff frequency is 10,000/2pi which is 1592 Hz.

Elijah McCoy invented the automatic oil cup so you can pour oil onto moving parts of a automotive. Elijah Mccoy also invented the Automatic Engine Lubricator,Lawn Sprinkler, and Folding Iron Board.

The strobe pin on the LM311 is used to disable the output, so that multiple 311's can be ganged together, with only one being turned on at a time. It is also used to adjust the balance of the device.

While Voltage and Resistance typically remain constant in incandescent lamps: P (Power in Watts) = I (Current in Amperes) times E (Electrostatic energy in Volts [AC and DC]).

P=I*E - when P (Watts) goes up so does I (Amps).

Counter is a digital circuit which is able to count from a specific number to another specific number (according to the requirement). Depending upon the counting style the counters can be divided into two.

i) UP counter- which increment one by one (eg. 0,1,,2,3,4,5............15) for a 4 bit counter

ii) Down counter- which decrements one by one (eg. 15,14,13,12,11,10,9,8................0) for a 4 bit counter.

A simple apllication of a counter is a diigital clock, having 3 counters. One for counting the seconds, another for counting the minute and the last one for counting the hour.

A silicon chip is a structure created by people using machines. The structure consists of a base, made of silicon with a small amount of other elements added, so this part is a mixture. The chip also has wiring and transistors printed on it, thus making the entire chip a structure rather than a mixture or pure substance.

You can reduce the voltage fluctuations by first determining what is causing them, then counteracting this cause. In small circuit designs with multiple switching amplifier and ICs, the power or ground lines may become noisy due to this switching. Placing capacitors at the ICs power and ground can reduce this to manageable levels in most cases. Sometimes it can become necessary to isolate specific circuit's power and ground from the system using small inductors as well. If you are designing a power supply, zener diodes, and isolated power outputs (at the same or different voltages) can be used.

R=V/i

That is 1000 ohm.

The higher voltage source forces current backwards into the lower voltage source, which can damage it or even cause it to explode.

You use a half-wave rectifier where the system design does not require a full-wave approach.

Half wave rectifier output is used for running ac motors.

to produce sustained oscillations without any ac input.it is nothing but an amplifier with positive feedback and without input.it just converts the noise in the circuit and amplifies it to produce oscillations.

Of or pertaining to an electron or electrons.

CRT is a mature technology, less expensive, higher contrast, and still produces brighter pictures than a flat-panel display of the same display area. These advantages are slowly being eroded with better flat-panel technology. The cons are more than offsetting its pros. Since CRT uses accelerated electrons and a phosphor screen, it has a little more harmful radiation (if not properly shielded), it uses more energy and generates more heat, and at the end of its life, produces more hazardous materials, not to mention that it occupies a larger footprint and weighs more than a flat-panel display.

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Gunn diodes are used in GUNN oscillator over high frequency application. its work on the transfer electron effect TET and the scientist J.B Gunn observe it so the phenomenon is named by gunn effect. the diode are made from GaAs material.because silicon is not suitable low forbidden energy gap 1.21eV only.