hi .iam shravan ..
iam doing m.tech (SE)
any one help me to do my project
title :

An Interaction-Based Test Sequence Generation Approach for Testing Web

this is IEE 2008 paper .if any one had this paper please ..upload ppts and documentation and code ....etc

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Dear sir..
I know d working principle of ir sensor but its range is vry low so I cannote use it in some project..
So pls give me some idea about ultrasonic sensor..
1.how to interface with AT89c51/52
2.assembly language prog to glow an led when any body infront of the sensor..
Kindly help me sir ....etc

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ULTRASONIC TESTING
NATURE OF SOUND WAVES
Sound waves are elastic waves
It can be transmitted through both fluid and solid media
Elastic waves with frequency higher than audio range is termed as ULTRASONIC WAVES
Ultrasonic waves used for non destructive inspection of materials are usually within frequency range 0.5 MHz to 20MHz
In fluids sound waves are of longitudinal compression type
Particle displacement is in the direction of wave propagation
In solids they are shear waves and elastic surface waves can also oc ....etc

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BASIC INSTRUMENTATION MEASURING DEVICES AND BASIC PID CONTROL


INTRODUCTION
Instrumentation is the art of measuring the value of some plant parameter,
pressure, flow, level or temperature to name a few and supplying a signal
that is proportional to the measured parameter. The output signals are
standard signal and can then be processed by other equipment to provide
indication, alarms or automatic control. There are a number of standard
signals; however, those most common in a ....etc

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basic avr working principle

Basically the AVR or Automatic Voltage Regulators function for generator is to ensure voltage generated from power generator running smooth to maintain the stable voltage in specified limit. It can stabilize the voltage value when suddenly change of load for power supply demand.
If the generator running in parallel condition,the AVR can controlled the voltage that it produce to ensure of equal value for reactive load sharing.
For the big system of interconnected power distribution with parallel design,it must have a ....etc

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i wnt immediately a ppt on ultrasonic spectacles and waist belt for visually impaired and blind persons ....etc

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To get full information or details of c source code for ultrasonic range finder using 8051 please have a look on the pages

http://electronicshubultrasonic-rangefinder-using-8051/

http://circuitstodayultrasonic-range-finder-using-8051

if you again feel trouble on c source code for ultrasonic range finder using 8051 please reply in that page and ask specific fields in c source code for ultrasonic range finder using 8051 ....etc

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Basic Principles of Ultrasonic Testing



basic principles of ultrasonic testing Wave propagation

Longitudinal waves propagate in all kind of materials.
Transverse waves only propagate in solid bodies.
Due to the different type of oscillation, transverse waves travel at lower speeds.
Sound velocity mainly depends on the density and E-modulus of the material.

Reflection and Transmission

As soon as a sound wave comes to a change in material characteristics ,e.g. t ....etc

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i want circuit of automatic braking system ..since i need to implement that in my project..
Thank you ....etc

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lux meter basic principle pdf

Luxmeter
a portable instrument for measuring illumination; a type of photometer. The simplest luxmeter consists of a selenium photocell that converts luminous energy into the energy of an electric current, which is measured by a pointer-type microammeter with scales calibrated in luxes (Ix). Different scales correspond to different ranges of the illumination being measured; scale changes are made by a switch that changes the resistance in the electric circuit. For example, a Iu-16 luxmeter has three measuring ran ....etc

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