DESIGN AND CONSTRUCTION OF AN AUTOMATIC DOOR BELL WITH OBJECT DETECTION
ABSTRACT
This project is on design and construction of an Automatic Door Bell with Object Detection. Automatic Door Bell with Object Detection detects when a visitor comes to our house. When someone comes to our house and he searches for the doorbell switch and then rings it to let us know his presence. If the who came to our house cannot find the doorbell or else if the person is so short that he cannot reach the doorbell, what can be done? How will it be if we use an automatic doorbell which rings as soon as a person arrives at our place? There are no more hassles. The person who comes to our house need not search for the doorbell and press it any more. If we install this automatic doorbell using object detection circuit, the circuit will automatically sense the presence of the person and it rings the doorbell.
This circuit operates using a pair of ultrasonic transmitter and receiver modules which are used to detect the person and then if the person is detected, the door bell is automatically turned ON when the person is in-front of the door.
The ultrasonic transmitter operates at a frequency of about 40 Kilo-Hertz. That means it continuously transmits the ultrasonic waves of about 40KHz. The power supply should be moderate such that the range of the transmitter is only about one or two meters. If the transmitting power is less than one meter, then there is a chance that the person who is one meter away is not detected. Also, if the range is set to be very large, then it may lead to false triggering, meaning that, the objects far away from our door are considered as the visitors and the alarm rings. This can be a nuisance for us if the alarm rings for every object or person far away. So, to avoid both the problems, the transmitting power is kept to an optimum level.
****************************************************************
This material is a complete and well researched project material strictly for academic purposes, which have been approved by different Lecturers from different higher institutions. We make abstract and chapter one visible for everyone.
All the Project Topics on this site have complete 5(five) Chapters . Each Project Material include: Abstract + Introduction + etc + Literature Review + etc + Conclusion + Recommendation + References/Bibliography.
To download the complete material click HERE
To know how to construct this particular project click HERE