Chapter 1 of the thesis

There exists different circuit simulation environments for digital, analog and mixed signal circuitry. Some of them are Ng Spice, GnuCap, Circuit Logix, LT Spice, Student version of Multisim, Top spice, Circuitsimulator1.5j, Mac Spice, 5Spice, Beige Bag, Micro-Cap 10, PECS, Proteus, QUCS, Solve Elec, Xspice, Pspice, Multisim, SiMetrix, TINA, PowerSim.

Some of them are freely available while others are licensed versions. Among these circuit simulators most popular simulators are MultiSim, Pspice.

Multisim is the circuit simulation environment from National Instruments. It is widely used by designers, researchers, students, academicians, professionals. Its rich features are tailored according to the needs of different profiles. In designers version it has features such as

(a)    Industry standard component list: which helps the design to be on par with industry standard components that are in manufactures catalogs.

(b)   Customized symbols: Designer is given the privilege to create his own symbols and make use of it in his/her design when standard symbols does not suit their needs.

(c)    Multiple designs: Designer can create complex circuits in multiple schematics and stills can work on all of them together. Compare and simulate their results.  

(d)   Interface with other simulation environment: Designer can interface with other simulation environment such as PSPICE using Spectre.

(e)    Advanced analysis of the circuit: it helps in going to minute details of circuit.  Studying the minute details will help greatly to design efficient circuits.

(f)    Easy to debug, reduces errors and ultimately an optimized circuit can be produced.

The student’s version of Multisim is made available for free but with limited access to components lists, circuit simulation tools etc., The Student version of MultiSim has a variety of features such as

(a)    Easy to draw schematics : From the given component list students can easily draw the circuit.It is easy to locate different components that are readily available

(b)   3D animations: 3D animations of prototype board, circuit components help students to easily interpret with real components. It helps students enjoy learning.

(c)    Easy to do circuit simulations: Circuit simulation is simple. And students can easily verify their manually done results with circuit simulation results.

(d)   Better understanding of theory: It helps students to visualize circuits and understand the theory behind it. Hands on experiences in building the circuits will reinforce the better understanding of the theory.

(e)    Student Design Projects: Student version of MultiSim is provided with decent component lists, components list that are manufacturer specific ,which in turn gives student privilege to build academic design projects.

(f)     Integrating Multisim with NI ELVIS: MultiSim when integrated with NI ELVIS(National Instruments Educational Laboratory Virtual Instrumentation Suite) is very helpful in analyzing analog circuits.

(g)    Interfacing MultiSIm with NI My DAQ: When NI MultiSim integrated with Ni My DAQ students can simulate all kinds of circuits from complex to simple.

questions I need to  answer....

Limitations of currently available circuit simulations:

Why and how we can do it differently.

Overview of how we do it.

Reference

http://www.circuitstoday.com/circuit-design-and-simulation-softwares

http://www.ni.com/

Please check the  essay and do corrections.

    Chapter 1

I am going to write chapter 1 of my thesis.All I know about the project is that I am going to do a microsoft visio   software for introductory electrical/electronics lab.

The targeted audience  are online engineering undergrad students who are not needed to come from a long distance to attend labs.

These are some details that I am able to find.

There are already some circuit  simulation environments available in the market.Software such as NI multi sim from National Instruments .Pspice from Cadence are few examples of circuit simulation environments.

NI multi sim has versatile features.They have  software for industrial circuit designers and researchers  and also they also have special software for academic purposes.

NI Multi sim for circuit designers and researchers includes featured areas such as

Aerospace and National Research Applications

Semiconductor Analysis ApplicationsLife Science, Medical Devices, and Bioinstrumentation ApplicationsEnergy and Power ApplicationsLow-Frequency Circuit Design for RF ApplicationsAutomotive Electronics Applications

NI Multi Sim for teaching applications includes

Analog Circuits and AnalysisDigital Logic Circuits, Microcontrollers, and FPGAsPower Electronics and SystemsStudent Design and Research Projects

We are now interested in only teaching applications of Analog circuits and  Analysis.
 NI Multi Sim is standard circuit design environment with integrated schematic capture and simulation.We can create a schematic by dragging and dropping the components and equipment from the list.Then connect them together using manual wiring or automatic wiring.And simulate the circuit for desired results.And results can be viewed in equipment or in the plots.

The circuit can be captured using the animations that are available in NI multi sim.This process includes selecting the components,wiring the schematic,simulating the circuits.And the desired results can viewed in equipment such as Digital Multi meters(DMM),Oscilloscope(CRO) or plots.

The other widely used software for simulations is PSpice .Pspice is a SPICE analog circuit and digital logic simulation program for Microsoft Windows.In pspice the circuit is described  to a  computer using  a file called circuit file.This contains circuit details such as the information about source and commands for what to do and what to display as output.The output is displayed in result file.

Different types of analysis such as DC analysis,AC analysis and transient analysis can be done using Pspice. There are other  basic components that are needed to be purchased additionally to add to the component list to work on a design .And for a beginner it is going to be hectic.

And I need to add details to multi sim and pspice features .And how they doesnot fit into our shoes.i.e how they are not  answering  our needs.And how they fail to acheive the purpose.Like in real  labs we will burn many resistors and diodes and transistors due high voltage and some components become short while others become open circuited.In mutli sim  schematic it is showing these details in schematic but not in animations.we wanted to add these details.And we need to add details that are usual in labs and that not included in multi sim.
Please help me  to prepare points that are available in multi sim and  pspice for simulations and the things that are lacking when compared to real lab situations.

we want provide a real experience to learner.

In chapter 1  I am supposed to write what is available in market .explain them.And where it fails to answering our needs. 
In chapter 2 I am supposed to write how i am answering these issues.
In chapter 3 thoery.
in chapter 4 how you make software.
In chapter 5 testing and evaluations.what can be done in future.

This is the plan .Now i need info for chapter 1.

Hi,

Please share your comments and suggestion to rectify the below code

This what is wanted to do

Dim counter , sum As Integer

For counter=1 to 100 step 10
sum+=counter
ListBox1.Items.Add (sum)
Next

* The program will calculate the sum of the numbers as follows:

sum=0+10+20+30+40+……

when I run it.it is giving something different.

Please let me know where I got wrong and why  I am getting different answer instead of 10 20 30....100