Technology advancements have made our lives much easier. New innovated products are launched
every day and affect our daily lives. One of the products that must be mentioned is a wireless
doorbell. In the earlier days, a simple doorknocker was enough to intimate the house owner about the
presence of an individual at the door. However, today house owners desire to install various alarm
systems in their home.An infrared sensor circuit is one of the basic and popular sensor module in an
electronic device. This sensor is analogous to human’s visionary senses, which can be used to detect
obstacles and it is one of the common applications in real time.