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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 :Friday 13th of February 2015 08:26:16 AM
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wwan..................[:=> 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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recautionary measure for the road user and that nobody should enter the gate at that moment.
iv) Sensing For Vehicles:
Laser light is used as a source and LDR as a tool for sensing purpose. When light strokes on LDR its resistance decreases and when light does not strike LDR its resistance remains at normal value. This change of resistance of LDR is used for sensing by the micro controller 89C51 by the use of compensation.
If there is no vehicle in between or beneath the gates, then the laser light from the source falls on the LDR since there is no obstacle. Since there is no vehicle or obs..................[:=> 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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program for this project is embedded in this Micro controller Integrated Chip and interfaced to all the peripherals. The timer program is inside the Micro controller IC to maintain all the functions as per the scheduled time. Stepper motors are used for the purpose of gate control interfaced with current drivers chip ULN2003 itâ„¢s a 16 pin IC.
Features:
¢ There is no time lag to operate the device
¢ Accuracy.

1
BLOCK DIAGRAM:

Fig 1. 1.1 Block Diagram of AUTOMATIC RAILWAY GATE
CONTROLLER
2
1.2 BLOCK DIAGRAM DESCRIPTION:
AT89C51 is a 40 pin dip micro controller, can..................[:=> 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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ext hardware reset.
6
Pin diagram of AT89C51 MICROCONTROLLER
Pin diagram:

Fig 2.2.1 Pin diagram of AT89C51 MICROCONTROLLER
7
Pin Description:
VCC: Supply voltage.
GND: Ground.
The AT 89c51 micro controller is a 40-pin IC. The 40th pin of the controller is Vcc pin and the 5V dc supply is given to this pin. This 20th pin is ground pin. A 12 MHZ crystal oscillator is connected to 18th and 19th pins of the AT 89c51 micro controller and two 22pf capacitors are connected to ground from 18th and 19th pins. The 9th pin is Reset pin.
Port 0: Port 0 is an 8-bit open-drain bi-directio..................[:=> Show Contents <=:]



Z-WAVE AS HOME CONTROL RF PLATFORM


Posted by: electronics seminars
Created at: Sunday 03rd of January 2010 12:35:05 AM
Last Edited Or Replied at :Sunday 03rd of January 2010 12:35:05 AM
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identification problems in the installation process where many devices are installed at the same time-€œ which light switch is which The manual process burdens the user with an input and/or validation process, which is impossible in many simple systems where the user interface is minimal. One example of a more optimal balance between network join and identification is the Z-Wave installation process .




The Z-Wave installation process is very flexible enabling both local and central installation. The local installation is ideal for small low cost systems (e.g. 5 light remot..................[:=> Show Contents <=:]



INTELLIGENT AMBULANCE FOR HOSPITAL GATES


Posted by: Electrical Fan
Created at: Monday 14th of December 2009 07:51:19 AM
Last Edited Or Replied at :Thursday 21st of January 2010 05:51:22 AM
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..................[:=> Show Contents <=:]



Selective Catalytic Reduction SCR


Posted by: computer science crazy
Created at: Tuesday 07th of April 2009 11:58:25 AM
Last Edited Or Replied at :Tuesday 07th of April 2009 11:58:25 AM
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red to make an SCR system work, the current options being a Vanadium based catalyst, or a catalyst with Zeolites in ..................[:=> Show Contents <=:]



Automatic Solar Tracker


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:16:01 PM
Last Edited Or Replied at :Tuesday 01st of January 2013 10:31:55 PM
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osed to achieve a unity power factor, balanced neutral point voltage and constant DC-bus voltage. Four power switches are used in the rectifier to generate a three-level PWM wave form on the rectifier terminal voltage.

The line current command is derived from a DC-link voltage regulator and an output power estimator. The hysteresis current Controller is used to track the line current command. To balance the neutral-point voltage, a capacitor voltage compensator is employed. The main advantages of using a three-level instead of a two-level PWM scheme are that the blocking voltage of each pow..................[:=> Show Contents <=:]



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