I want circuit diagram for over heat detector using 8051 microcontroller

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Circuit diagram for over heat detector using 8051 microcontroller

Description:
This is a low cost microcontroller based project. Microcontroller based Overheat detector using Temperature sensor with Buzzer indication has applications in various areas including Industrial application, domestic application. Temperature sensor is used to detect overheat condition. Output of temperature sensor is given to Comparator. And output of comparator IC is given to microcontroller 89s51. Liquid crystal display – LCD display shows a message when Temperature crosses threshold level. And also a Buzzer is turned on to give overheat indication. We have provided a potentiometer which is used to vary the threshold level of comparator which decides the threshold level of overheat condition.
Description in detail:
Various important blocks of system are:
1) Microcontroller
2) Temperature sensor
3) Comparator
4) LCD Display
5) Buzzer
6) Power supply

Applications and Advantages:
Applications of Microcontroller based Overheat detector using Temperature sensor with Buzzer indication:
1) This project can be used in Industries, Companies and Home to monitor High temperature condition.

Advantages of Microcontroller based Overheat detector using Temperature sensor with Buzzer indication:
1) This project is easy to use.

Future Development:
1. We can monitor more parameters like LPG gas leakage.