I am doing a Tiny Digital Thermal Sensor using PIC18F4520 as my project. The requirement of this project is to allow us to see the room temperature in the room and displaying the temperatre readings at the LCD screen . If the temperature exceeds a limits that i set , AST1109MLTRQ which is a buzzer will be activated to alert us.
The schematic of my board is on page 10 of the Pdf.