DOOR BUZZER USING ULTRASONIC SENSOR

Covid-19 has created havoc in people also we can see it is increasing day by day all over the world. We also know a well known proverb that “prevention is better than cure” so, we need to search for prevention methods so that it can be avoided. Therefore, some of the preventive measures are as follows: social distancing, avoiding surface contact, washing hands frequently and wearing mask. Then also there are many unavoidable circumstances like people visiting to the homes, in that case the guests have to ring the doorbell which might also spread the infection. Thus, as the doorbell has also become hotspot for spread of the virus this can be avoided if we use touch less doorbell. By which, we can avoid surface contact. Touch less door Bell can be created using an ultrasonic sensor and Arduino Uno. In which, we just have to put our hand in front of the sensor then the buzzer rings to intimate the owner of the house.