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electronic voting machine project full report


Posted by: seminar topics
Created at: Monday 22nd of March 2010 09:34:23 AM
Last Edited Or Replied at :Friday 20th of January 2012 11:58:58 PM
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eded to moderate output voltage and current fluctuations, in rectifier output. They are also widely used as coupling capacitors in circuits where AC should be conducted but DC should not.
3.8 BUZZER :-


Fig 3.8.1 Buzzer
A Buzzer or Beeper is a signaling device, usually electronic, typically used in automobiles, household appliances such as microwave ovens, or game shows.
It most commonly consists of a number of switches or sensors connected to a control unit that determines if and which button was pushed or a preset time has lapsed, and usually illuminates a light on the appropriate..................[:=> Show Contents <=:]



Automatic power meter reading system using GSM network


Posted by: Electrical Fan
Created at: Monday 14th of December 2009 07:42:02 AM
Last Edited Or Replied at :Thursday 11th of April 2013 12:32:05 AM
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ications out of the industrial field, which up to now turn to be large in size and expensive. We present the design of a tiny and low cost Wireless Weather Station to measure accurate temperature (±0.1ºC), relative humidity (±3%), light intensity and atmospheric pressure (±0.8hPa). These direct climatic variables and others indirectly attainable, like the dew-point, wind chill, etc, are readable through a web page. The chosen sensors are factory calibrated and have a digital interface. The Weather Sensor Nodes are able to achieve ultra low power consumption (40..................[:=> Show Contents <=:]



biometric voting system


Posted by: ajukrishnan
Created at: Wednesday 09th of December 2009 06:32:20 AM
Last Edited Or Replied at :Saturday 10th of November 2012 12:06:31 AM
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a voter is entered as input to the system. This is then compared with the available records in the Database. If the particular pattern matches with any one in the available record, access to cast a vote is granted. But in case the pattern doesnâ„¢t match with the records of the Database or in case of repetition, access to cast a vote is denied or the vote gets rejected. All the voting machines are connected in a network, through which data transfer takes place to the main host. The result is instantaneous and counting is done finally at the main host itself. The overall cost for conducting..................[:=> Show Contents <=:]



Clap Activated Remote


Posted by: Electrical Fan
Created at: Saturday 10th of October 2009 04:59:48 AM
Last Edited Or Replied at :Saturday 10th of October 2009 04:59:48 AM
Clap Activated Remote , Remote, Activated , Clap, clap switch circuit pdf , circuit diagram of remote control fan regulator, clap operated remote control fan ,
one at a time, when the clock in put is fed with pulses. IC3 and IC4 are dual JK flip-flops. In this circuit they store (latch) the state of the four switches and control the output through transistors and triacs. At the first clap, the output of gate N3 goes low. Diode D1 is forward biased and it conducts, discharging capacitor C4. The reset input of IC2 goes low, releasing its reset state. All the J and K inputs of the four flip-flops are low and so these do not change state, even though their clock inputs receive pulses. When the reset input of IC2 is low, each clock pulse causes IC2 to adv..................[:=> Show Contents <=:]



optical space communication or Free-space optical communicationFSO


Posted by: computer science crazy
Created at: Sunday 13th of September 2009 07:43:26 PM
Last Edited Or Replied at :Wednesday 15th of February 2012 01:17:53 AM
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s, and even sharks when deployed under sea, FSO technology is subject to its own potential outside disturbances. Optical wireless networks based on FSO technology must be designed to combat changes in the atmosphere, which can affect FSO system performance capacity. And because FSO is a line-of-sight technology, the interconnecting points must be free from physical obstruction and able to see each other.

Fog: The primary challenge to FSO-based communications is dense fog. Rain and snow have little effect on FSO technology, but fog is different. Fog is vapor composed of water droplets, wh..................[:=> Show Contents <=:]



Multi Level Car Parking System a presentation


Posted by: mechanical wiki
Created at: Tuesday 08th of September 2009 12:40:59 PM
Last Edited Or Replied at :Sunday 22nd of June 2014 07:28:21 AM
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car park or a self park car park depends on the layout and number of exits.

Components Used

S. No. COMPONENT SPECIFICATION
1. STEP DOWN TRANSFORMER 220 TO 9 VOLT AC- 750 MA
2. DIODE IN 4007 ( 2)
3. CAPACITOR 1000MFD(2) 16 VOLT
4. REGULATOR 7805 ( 3 PIN REGULATOR) 1A
5. RESISTOR: FIXED 470 OHM.(3)
10 K OHM (1)
4,7 K (2)
6. REED SENSOR (10)
7. LCD 2 BY 16
8. VARIABLE RESISTOR 4. 7 K OHM
9. OPTOCOUPLER PC 817 (2)
10. NPN TRANSITOR (2) BC 548/547
11. PNP TRANSISTOR(2) BC 558/557
12. DC MOTOR GEAR SLOW SPEED 9-12 VOLT-250 MA
13. CRYSTAL OSCILLATOR 12 MHz
14. DISC CAPACI..................[:=> Show Contents <=:]



Microcontroller Based Cellular Voting Machine


Posted by: seminar projects crazy
Created at: Friday 14th of August 2009 04:59:51 AM
Last Edited Or Replied at :Thursday 17th of January 2013 12:54:13 AM
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nsmitter. The master contains a FM receiver, DTMF decoder, Micro controller and Display units. The tone from the voting unit is received by the receiver and is decoded and specific functions are carried out by micro controller and then it is displayed...................[:=> Show Contents <=:]



RF transmitter architecture-VLSI design


Posted by: Computer Science Clay
Created at: Friday 07th of August 2009 06:51:20 AM
Last Edited Or Replied at :Friday 07th of August 2009 06:51:20 AM
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ecently, a digitally -controlled oscillator (DCO), which deliberately avoids any analog tuning controls, was first presented for RF wireless applications. This allows for its loop control circuitry to be implemented in a fully digital manner as first proposed.
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http://www.zi..................[:=> Show Contents <=:]



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