|
|
 Posted - 07/09/2007 : 5:53:11 PM
|
This project ?Fire Monitor? is used to monitor the Temperature of two Rooms and if the sensor found any fire in the Room then the alarm will be switched ON until the Fire is put off else the Reset button is pressed. The Fire was sensed by using the Thermistor.
The Thermistor is a passive device which has a Negative Temperature Co-efficient (NTC), i.e when the temperature increases then the resistance of the Thermistor will decrease. A analog comparator is used for the fire sensor circuit , at normal temperature the output of the comparator is low, and if there is any fire hazard, then the temperature increases and therefore the resistance of the Thermistor decreases and the output of the comparator goes High which Trigger the Microprocessor though the PPI 8255. Then the Microprocessor will switch ON the Alarm for fire.
The above system is monitored and controlled by the 8 bit Microprocessor. The Microprocessor continuously monitors the two sensors and if any one of the sensor sense Fire then it latches the sensor and the microprocessor switch on the Alarm according to the software stored on the RAM.
J.Binu
Click here to buy fully finished MIcrocontroller Project Kits
|
|
Country:  India ~
Posts: ~
Member Since: 01/06/2007 ~
Last Visit: 22/08/2008
|
|
|
|
|
Posted - 27/01/2008 : 8:34:46 PM
|
how to implement this downloaded file
pritesh |
|
|
|
Country: India ~
Posts: 1 ~
Member Since: 22/01/2008 ~
Last Visit: 27/01/2008
|
|
|
|
|
|
Posted - 28/01/2008 : 4:50:22 PM
|
| Make the hardware and connect it with a 8085 trainer kit and enter the program and run it. |
|
|
|
Country: India ~
Posts: 477 ~
Member Since: 01/06/2007 ~
Last Visit: 22/08/2008
|
|
|
|
|
|
Posted - 01/07/2008 : 02:44:33 AM
|
hey plz some one suggest me.....wat should be the range of the thermistor used in this experiment.....its beign difficult 4 me to clear this stage
piyush |
|
|
|
Country: India ~
Posts: 1 ~
Member Since: 07/02/2008 ~
Last Visit: 01/07/2008
|
|
|
|
|
|
Posted - 01/07/2008 : 4:32:02 PM
|
| Thermistors will get only a low range, so better you can use some other IC based temperature sensors, such us DS1620, DS1621, Ds1820 |
|
|
|
Country: India ~
Posts: 2 ~
Member Since: 01/07/2008 ~
Last Visit: 07/07/2008
|
|
|
|
|
|
Posted - 21/08/2008 : 12:03:12 PM
|
can u tel me the specifications of the THERMISTOR used in this project
hrishi |
|
|
|
Country: India ~
Posts: 2 ~
Member Since: 14/08/2008 ~
Last Visit: 21/08/2008
|
|
|
|
|
|
Posted - 22/08/2008 : 4:05:47 PM
|
Its 10k thermistor.
(it have 10k resistance value at normal temperature) |
|
|
Country: India ~
Posts: 477 ~
Member Since: 01/06/2007 ~
Last Visit: 22/08/2008
|
|
|
|
Home |
Forum |
Projects |
Blogs |
Code Library |
About Me |
FAQ |
All Forums
Fire Monitor
