Ohm's Law

Ohm law is any important law in Electrical Engineering
Ohms law states that
voltage across a resistance is equals top product of current passing through resistance;
Resistance R
Voltage V
current I

Formula:
                               V=IR


if we know any two values like current and voltage we can find other one like resistance........

Light Dark Sensor

This is a light dark sensor, it uses BJT (bipolar junction transistor), LDR (Light dependent resistor), LED (Light emitting diode), and a resistor for biasing BJT, it uses 6V but you can use 9V too because i used a 9V battery.
care should be taken in determining base,emitter and collector for BJT.

In its working, at night resistance of LDR increases and BJT starts conducting but during day its resistance is almost negligible and BJT is in non-conducting state.

C++ a complete guide

Today i am going to upload all the stuff related to C++ including Slides, project that i made when i was in 3rd semester,small programs,a complete guide for beginners
Hope this will help you in your course, i you found any difficulty please feel free to comment, i will help you :)
here is a link 

http://www.mediafire.com/download.php?o73nnaagxunlimy


Best of Luck Engineers

Calculus harward Anton Bivens davis 8th edition

Today i am uploading Solution manual for Calculus by harward Anton Bivens davis 8th edition
If you wanna any help related to this course please feel free to comment :) i will try to help you.
here is a link for solution manual

http://www.mediafire.com/download.php?oi2tet9v1qykzsw


Best of luck engineers :D

Fundamentals of Physics by halliday Resnick 8ed solution manual

If you wanna learn Physics and its fundamentals, there is a book  named Fundamentals of Physics 8th edition by Halliday Resnick ,This book is for all engineering students, i have completed this course in two semester as physics 1 and physics 2 in 1st and 2nd semester.This is a good book that clears all your concept, you can download from google, i am uploading its solution manual because many students cannot find its solution manual thats why i am uploading its solution manual.
If you cannot find its book comment below i will upload it, so here is a solutin manual link

http://www.mediafire.com/view/?xs13dw5accx7uit


Best of Luck Engineers

Object oriented programming by Robert Lafore

If you wanna learn Object oriented programming in C++ you can download a book by Robert Lafore from a link given below

http://www.mediafire.com/view/?az91nvqu4wa166o

I learnt alot from this book thats why i prefer this book if you wanna learn Programming.This book clears all the concept of c++.

If  you found some problem or stuck some where comment your query i will guide you, but you should know about basic in C++.

Transformer

Transformer:-

it is an electrical device which step up or step down AC voltage with no change in frequency.
In its construction it contain a core made of ferromagnetic sheets which may be in F, E and I shaped.
Insulated copper wire is used as its winding.
Core has two sides primary and secondary side.
If it is step down transformer its primary side has greater number of turns of winding then Secondary.
and if it step up transformer, number of turns on primary side is less then secondary.
In both side of transformer total power remains constant that is IV (current*voltage).

We have a formula to calculate number of turns 
                            Vp/Vs  =Np/Ns
Vp is primary voltage
Vs is secondary voltage
Ns is number of secondary turns
Np is number of primary turns

Example of Step up transformer:-   Inverter which step up voltage    form 12 V to 220V Ac which is used in UPS(uninterrupted power supply)

Example of Step down transformer:-  5V DC power supply, in this power supply we have to convert 220V ac to 5V ac by step down transformer then by using bridge rectifier we can convert it in to dc