diffrence between sd card and microsd card

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Working of laser printer/xerox and how is it works

How the laser printer works,xerox,parts of it

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download pspice student version 9.1/9.2 for win xp/7/8

download pspice student version 9.1/9.2  for win xp/7/8

pspice 9.1

 FOR DOWNLINK GOTO DOWN AND TO DOWNLOAD LIBRARIES

AUTHOR/OWNER: CADENCE

WEBSITE: www.orcad.com / www.cadencepcb.com/

copyright/license: free

FILE SIZE: 27.8MB

DESCRIPTION:

What's included with the Student Version

Limited versions of the following products are included in the Student Version of PSpice:

• PSpice A/D 9.1, Web Update 1, including PSpice Schematics 9.1
• Your choice of schematic editors (specify during installation)
  • PSpice Schematics 9.1
  • Capture 9.1, Web Update 2

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Limits, distribution, and contact information

Limits
The following limits apply to the Student Version of the products:
PSpice A/D
Circuit simulation is limited to circuits with up to:

• 64 nodes
• 10 transistors
• 65 digital primitive devices
• 10 transmission lines in total (ideal or non-ideal)
• 4 pairwise coupled transmission lines.

Additional limits:

• The sample library includes 39 analog and 134 digital parts.
• Device characterization in the PSpice Model Editor is limited to diodes.
• Stimulus generation in the PSpice Stimulus Editor is limited to sine waves (analog) and clocks (digital).
• Circuit optimization with the PSpice Optimizer is limited to one goal, one parameter, and one constraint.
• You can not create CSDF format data files.
• You can only display simulation data from simulations performed with the Student Version of the simulator.

Schematics

• You can place a maximum of 50 parts on a schematic design.
• You can only draw on size A sheets.

Capture

• The PSpice libraries are the only ones included. The standard Capture libraries are not included.
• Import facilities, netlisters, and accessories that are not relevant to PSpice are not included.
• You can not save a design that contains more than 60 parts. (You can view or create larger designs, but you can not save them.)
• You can not save a library that contains more than 15 parts.

Minimum hardware requirements

• Intel Pentium 90MHz or equivalent processor
• Windows 95, Windows 98 or Windows NT
• 16MB RAM (32MB recommended)
• 90MB of free hard disk space
• CD-ROM drive
• Mouse or similar pointing device

Distributing the Student Version of PSpiceThe Student Version of PSpice can be distributed freely -- we encourage it -- providing all copyrights are observed and the software is not redistributed under another name.
Contacting customer support
To obtain assistance with the Student Version of PSpice, you can send questions to our customer support email address: mailto:tech.support@pspice.com

download pspice :click here

download digikey library: click here

download digikey database: clickhere

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Lecture 1: XHTML and CSS Tutorial - 1 - Downloading a Text Editor

about lecture:
Prof. Bucky Roberts
Visit my website at https://buckysroom.org/ for all of my videos and tutorials!

Facebook - http://www.facebook.com/pages/TheNewB...

LECTURE CONTENTS:
Downloading a Text Editor - Creating our First Webpage - body and headers - Paragraphs and Line Breaks - Bold, Italics, and Comments - Adding Links to our Webpage - Creating a Link Within a Web Page - Email Links and Tool Tips - Adding Images to the Webpage - Resizing Images - Tables - Table Headers and Movie Stars! - colspan & Annoying People - Table width, cellpadding, and cellspacing - Lists - Intro to CSS
RGB Color and Line Spacing - font-weight & font-style - text-align and Changing Background Color - Background Images - Padding - Border - Margin - Width & Height - Styling Links - Styling Tables - Background Images - Style More Than One Elements & Span! - div - Styling Using Classes - IDs - Child Selectors - Pseudo Elements - External Style Sheets - Overriding Styles - Absolute Positioning - Relative Positioning - Fixed Positioning - Max Width & Height - Introduction to Forms - Check Boxes & Radio Buttons - Drop Down Lists - Text Areas - Passwords & Upload Buttons - Submitting Forms - How to Publish Your Website! 

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aerospace engineering full course online by nptel and IIT's.

aerospace engineering full course online by nptel and IIT's

Aerospace Engineering is the primary branch of engineering concerned with the research, design, development, construction, testing, science and technology of aircraft and spacecraft. It is divided into two major and overlapping branches: aeronautical engineering and astronautical engineering.

followings are free video lecture for aerospace engineering

1. Aerospace engineering - Introduction to Propulsion
2. Aerospace engineering - Jet Aircraft Propulsion
3. Aerospace engineering - Foundation of Scientific Computing
4. Aerospace engineering- Advanced Control System Design
5. Aerospace engineering - Introduction to Aerospace Propulsion
6. Aerospace engineering - Instability and Transition of Fluid Flows
7. Aerospace engineering-Introduction to Helicopter Aerodynamics & Dynamics
8. Aerospace engineering - Turbomachinery Aerodynamics
9. Aerospace engineering - Aero elasticity
10. Aerospace engineering - Flight Dynamics II (Stability)
11. Aerospace engineering - Acoustic Instabilities in Aerospace Propulsion
12. Aerospace engineering- Gas Dynamics
13. Aerospace engineering - Optimal Control, Guidance and Estimation
14. Aerospace engineering - High Speed Aero Dynamics
15. Aerospace engineering - Introduction to Aerodynamics
16. Aerospace engineering - Space Flight Mechanics

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Basic Principle Of Alternator

A.C. generators or alternators (as they are usually called) operate on the same fundamental principles of electromagnetic induction as d.c. generators. They also consist of an armature winding and a magnetic field. But there is one important difference between the two. Whereas in d.c. generators, the armature rotates and the field system is stationary, the arrangement in alternators is just the reverse of it. In their case, standard construction consists of armature winding mounted on a stationary element called stator and field windings on a rotating element called rotor.

The details of construction are shown in Fig.

alternator

The stator consists of a cast-iron frame, which supports the armature core, having slots on its inner periphery for housing the armature conductors. The rotor is like a flywheel having alternate N and S poles fixed to its outer rim. The magnetic poles are excited (or magnetised) from direct current supplied by a d.c. source at 125 to 600 volts. In most cases, necessary exciting (or magnetising) current is obtained from a small d.c. shunt generator which is belted or mounted on the shaft of the alternator itself. Because the field magnets are rotating, this current is supplied through two sliprings. As the exciting voltage is relatively small, the slip-rings and brush gear are of light construction. Recently, brushless excitation systems have been developed in which a 3-phase a.c. exciter and a group of rectifiers supply d.c. to the alternator. Hence, brushes, slip-rings and commutator are eliminated.

When the rotor rotates, the stator conductors (being stationary) are cut by the magnetic flux, hence they have induced e.m.f. produced in them. Because the magnetic poles are alternately N and S, they induce an e.m.f. and hence current in armature conductors, which first flows in one direction and then in the other.

Hence, an alternating e.m.f. is produced in the stator conductors
(i)whose frequency depends on the number of N and S poles moving past a conductor in one second and
(ii)whose direction is given by Fleming's Right-hand rule.

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Aerospace engineering - Space Flight Mechanics

Aerospace engineering- Space Flight Mechanics

Lecture summary:

Space Flight Mechanics by Dr. Manoranjan Sinha, Department of Aerospace Engineering, IITKharagpur.

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