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MICROCONTROLLER BASED AUTOMATIC RAILWAY GATE CONTROL ppt


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Created at: Monday 27th of February 2012 03:17:27 AM
Last Edited Or Replied at :Thursday 01st of March 2012 11:37:35 PM
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electronic ink


Posted by:
Created at: Monday 27th of February 2012 02:59:57 AM
Last Edited Or Replied at :Monday 27th of February 2012 02:59:57 AM
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need detailed information about electroni..................[:=> Show Contents <=:]



Automatic Railway Gate Control and Track Switching full report


Posted by: project topics
Created at: Friday 23rd of April 2010 12:43:59 PM
Last Edited Or Replied at :Tuesday 23rd of April 2013 07:24:07 AM
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has two stages: a transmitter unit and a receiver unit. The transmitter unit consists of an infrared LED and its associated circuitry.
IR Transitter
The transmitter circuit consists of the following components:
1. IC 555
2. Resistors
3. Capacitors
4. IR LED
The IR LED emitting infrared light is put on in the transmitting unit. To generate IR signal, 555 IC based astable multivibrator is used. Infrared LED is driven through transistor BC 548.
IC 555 is used to construct an astable multivibrator which has two quasi-stable states. It generates a square wave of frequency 38kHz and amplitu..................[:=> Show Contents <=:]



AUTOMATIC RAILWAY CROSSING GATE CONTROLLER


Posted by: sneha challa
Created at: Thursday 08th of April 2010 07:10:55 AM
Last Edited Or Replied at :Monday 06th of February 2012 10:12:53 PM
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wwant details regerding this projec..................[:=> Show Contents <=:]



Automatic Railway Gate Controller using FM Communications full report


Posted by: project topics
Created at: Saturday 03rd of April 2010 01:51:27 PM
Last Edited Or Replied at :Tuesday 29th of March 2011 01:16:15 PM
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o an F.M signal remains virtually unchanged. F.M is also better able to transmit sounds in stereo than A.M. Commercial F.M broadcasting stations transmit their signals in the frequency range of 88 megahertz (MHz) The project is designed using F.M COMMUNICATION to avoid railway accidents happening at unattended railway gates, if implemented in spirit. This project utilizes two powerful IR transmitters and two receivers; one pair of transmitter and receiver is fixed at up side (from where the train comes) at a level higher than a human being in exact alignment and similarly the other pair is fix..................[:=> Show Contents <=:]



MICROCONTROLLER BASED AUTOMATIC RAILWAY GATE CONTROL full report


Posted by: project topics
Created at: Saturday 03rd of April 2010 01:43:46 PM
Last Edited Or Replied at :Wednesday 09th of January 2013 04:22:43 AM
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in may be approaching the gate in either direction. So all four signals are made RED initially to indicate that gate is open and vehicles are passing through the gate.
The road user signals are made GREEN so that they can freely move through the gate buzzer is made 'OFF' since there is no approach of train and road users need not be warned.
ii) Train Arrival Detection:
IR
transmitter
IR
receiver
Comparator
Transistor switch
Detection of a train approaching the gate can be sensed by means of sensors R1,R2,R3 and R4 placed on either side of the gate. In a particular direction of approac..................[:=> Show Contents <=:]



Automatic Railway Gate Controller Using Stepper Motor full report


Posted by: project report tiger
Created at: Tuesday 02nd of February 2010 02:06:03 AM
Last Edited Or Replied at :Thursday 08th of March 2012 09:55:10 PM
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otor has logically two windings per phase, one for each direction of magnetic field. Since in this arrangement a magnetic pole can be reversed without switching the direction of current, the commutation circuit can be made very simple (e.g. a single transistor) for each winding. Typically, given a phase, one end of each winding is made common: giving three leads per phase and six leads for a typical two phase motor. Often, these two phase commons are internally joined, so the motor has only five leads.

Fig 3.2 Unipolar stepper motor coils
In the construction of unipolar stepper motor the..................[:=> Show Contents <=:]



unmanned railway gate


Posted by: Ahamed
Created at: Monday 01st of March 2010 08:19:57 AM
Last Edited Or Replied at :Monday 01st of March 2010 11:26:37 AM
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plz help to find ppts on the to..................[:=> Show Contents <=:]



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