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fire alarm circuit using microcontroller 8051

Posted by:
Created at: Monday 19th of November 2012 12:44:45 AM
Last Edited Or Replied at :Saturday 01st of November 2014 05:56:38 AM
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I urgently need a fire alarm circuit that detects heat using lm35 sensor(using adc to convert analog to digital) and after the temperature exceeds a said limit (say 50deg) the buzzer starts to buzz..please help ur..................[:=> Show Contents <=:]


Posted by: project report helper
Created at: Wednesday 06th of October 2010 12:54:46 AM
Last Edited Or Replied at :Wednesday 06th of October 2010 12:54:46 AM
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track railway gate controlling using 8051 microcontroller

Posted by: project report helper
Created at: Thursday 30th of September 2010 04:28:28 AM
Last Edited Or Replied at :Tuesday 23rd of April 2013 05:42:01 AM
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osite direction and gate opens and motor stops. A red indicator light glows immediately after the sensor1 gets activated & the gate remains closed till the train reaches the sensor2.Then the gate opens & a green light glows as an indication for the motor drivers to cross the gate wi..................[:=> Show Contents <=:]


Posted by: raj03linkers
Created at: Sunday 01st of August 2010 07:50:18 AM
Last Edited Or Replied at :Tuesday 12th of March 2013 04:54:49 AM
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I'm raj ramos a computer engineering student. I just want to ask the details of the project MICROCONTROLLER AVR ATMEGA-8535 BASED SMOKE DETECTOR FOR POLLUTION CHECKING. Can you please send me the circuit..................[:=> Show Contents <=:]

microcontroller based infrared object counter

Posted by: nitinmathur1989
Created at: Saturday 31st of July 2010 09:35:27 PM
Last Edited Or Replied at :Saturday 31st of July 2010 09:35:27 PM
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hi, i am a B. Tech. 4th yea..................[:=> Show Contents <=:]


Posted by: seminar topics
Created at: Monday 22nd of March 2010 10:59:59 AM
Last Edited Or Replied at :Monday 08th of April 2013 03:28:14 AM
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age regulators and filters with bridge rectifier to convert the A.C into D.C voltage .
For voltage regulation we are using LM 7805 and 7812 to produce ripple free 5 and 12 volts D.C constant supply.
DS 1820 Temperature Sensor:
The DS18S20 digital thermometer provides 9-bit Celsius temperature measurements and has an alarm function with nonvolatile user-programmable upper and lower trigger points. The DS18S20 communicates over a 1-Wire bus that by definition requires only one data line (and ground) for communication with a central microprocessor. It has an operating temperature range of â..................[:=> Show Contents <=:]

water level detector using buzzing alarm using microcontroller

Posted by: raju.vishwanath
Created at: Tuesday 16th of February 2010 02:02:03 AM
Last Edited Or Replied at :Friday 04th of February 2011 01:04:34 AM
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I am student from eee dept. I want to do a project on 'water evel detector using buzzing alarm to indicate th..................[:=> Show Contents <=:]

avoid railway accidents at unattended railway gates using 8051 microcontroller

Posted by: computer science technology
Created at: Friday 22nd of January 2010 02:43:36 PM
Last Edited Or Replied at :Wednesday 18th of January 2012 10:16:00 PM
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der to avoid trapping between the gates and stop sound after the train has crossed.
The same principle is applied for track switching. Considering a situation wherein an express train and a local train are traveling in opposite directions on the same track; the express train is allowed to travel on the same track and the local train has to switch on to the other track. Two sensors are placed at the either sides of the junction where the track switches. If thereâ„¢s a train approaching from the other side, then another sensor placed along that direction gets activated and will send an inte..................[:=> Show Contents <=:]

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