• A. Vidyullatha

In today’s world, there is a continuous need for automatic appliances with the increase in standard of living; there is a sense of urgency for developing circuits that would ease the complexity of life. This Paper focuses on “Visitor counter based power saving using sensor” using Microcontroller is a reliable circuit that takes over the task of controlling the room lights as well us counting number of persons/ visitors in the room very accurately. When somebody enters into the room then the counter is incremented by one. If there is no one in the room the room lights automatically Turn OFF. Moreover the total number of persons inside the room is also displayed on the LCD. The microcontroller does the above job. It receives the signals from the sensors, and this signal is operated under the control of software which is stored in ROM. Microcontroller 89S52 continuously monitor the Infrared Receivers. When any object pass through the IR Receiver's then the IR Rays falling on the receiver are obstructed, this obstruction is sensed by the Microcontroller. Infra red sensors are a type of light sensors they function in the infra red part of the frequency spectrum. IR sensors are active sensors. They consist of an emitter and a Receiver. When the beam is cut the controller then accordingly comes to know if the person is entering or exiting and then accordingly increments or decrements the count which is then displayed on the 16 x 2 Alphanumeric LCD. If there are people in the room the controller turns on the power in the room. Since the controller cannot provide the necessary power a relay is used. The controller turns ON/OFF the relay using a relay driver circuit.

Infrared Receiver, 89S52 Microcontroller, LCD .

"VISITOR NUMBER BASED ELECTRICITY SAVING USING SENSORS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 7, page no.1246-1249, July-2018, Available :http://www.jetir.org/papers/JETIRC006214.pdf

"VISITOR NUMBER BASED ELECTRICITY SAVING USING SENSORS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 7, page no. pp1246-1249, July-2018, Available at : http://www.jetir.org/papers/JETIRC006214.pdf