Automatic Doorbell

The title of this project is Automatic Doorbell. Doorbell has evolved through the century. The old people used pipe to call people inside a house. Nowadays, community used electrical doorbell which need to push button to ringing the bell. Even though, electrical doorbell is good, it still can be improvise to a better system. Guests that come to the house, does not know whether the owner is available or not. Even the owner may not hear the bell ringing. This project used PIR sensor to detect guest so the guest does not need to push button. Once the PIR sensor detect guest, it will signalled the microcontroller, PIC 18F4550 to triggering the outputs (buzzer, LED, LCD) to start functioning. If the bell is not enough to alert the owner, the LED will be place suitably inside each rooms. The LCD will display first set of message “Owner Available” if the condition is run and another set of message “Sorry, Owner Unavailable” if the second condition is run. The outputs component (LED, buzzer, LCD) manage to give result as desired.