Microcontroller based room control system.

There are fluorescent lamp and electric fan in a room. To show the number of people in the room and to switch on and switch off fluorescent lamp and electric fan, the work of “Microcontroller Based Room Control System” is designed and carried out. There are two microswitches namely ENTER and EXIT. When a person enters the room, ENTER switch is pressed, the number of people is increased by one. When a person leaves the room, EXIT switch is pressed, the number of people is decreased by one. If there is no one in the room, both fluorescent lamp and electric fan are switched off. If there is at least one person, the fluorescent lamp is switched on. If there are five people and above, electric fan is also switched on. The required program is written in Pic BASIC Pro programming language. It is compiled and downloaded into PIC16F84A microcontroller with the aid of GTP USB Lite programmer