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This Project “Automatic Room Light Controller with Visitor Counter using Microcontroller AT89S52 continuously monitor the Infrared Receivers, When any . This Project ―Automatic Room Light Controller with Visitor Counter Output signal from AT89S52 is given to the base of the CHAPTER: 3. This automatic room light controller project with visitor counter is a reliable circuit based on the AT89S52 microcontroller. It takes over the task of controlling room.

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Enter the email address you signed up with and we’ll email you a reset link. Help Center Find new research papers in: Can you provide http: Please email us your address in detail. What is the use of buzzer in this project… Reply Microtronics Technologies Post author 9 July, at All we need is to do minor changes to activate this telephone as it works as to become auto dialer circuit. And if you want to operate this project on regulated DC supply then you can remove transformer and you can directly give 9 volts supply.

In this project we have set the limit to 15 for demo purpose. These should be placed on the door frame, in-front of each other. Help Center Find new research papers in: One of these 2 pins is connected to the Normally open terminal of the Relay which is also known as NO contact.

The IC in the transmitter side is to generate 36 kHz square wave. Reply Name 14 October, at 8: Suppose a seminar hall has seating capacity of then only people should be allowed inside room. Port 0 is used for the 7-Segment display purpose.

  ASTM D4123 PDF

This electronic setup auto activated whenever the intruder enters to the unauthorized no entry area. And PC interfacing can be used to send data vvisitor computer then a computer application can be xutomatic to send this data to internet.

Thus Microcontroller increments the count. There are 2 transmitters and 2 receivers placed infront of each other. In this circuit, a negative pulse applied at pin 2 triggers an internal wwith that turns off pin 7’s discharge transistor, allowing C1 to charge up throughR1. Reply muhd 23 July, at 1: Although designed primarily as fixed voltage regulators, these devices can be used with external components toobtain adjustable voltages and currents.

Low power consumption 7. Power off flag Reply Microtronics Technologies Post author 10 October, at 3: Reply chinnu 6 January, at 4: It is used only when one single person cuts the rays of the sensor hence it cannot be used when two person cross simultaneously. We have to take precaution that the IR rays of first vieitor should fall only on first IR receiver and not on second receiver.

Micron roller AT89S52 continuously monitor the infrared receivers, when any object pass through the IR rays falling on the receivers are obstructed this obstruction is sensed by the microcontroller.

Automatic Room light Controller with Visitor Counter | Neeraj Sharma –

But the IR receiver is not giving active low output. It is central processing unit for the project. You can keep them at 4 feet from ground.

As soon as pin of the microcontroller goes high, the relay operates. So when the Ligh rays are interrupted by any person then Microcontroller will receive a high pulse from the IR receiver.


The output goes high when there is an interruption and it return back to low a f t e r t h e t i m e p e r i o d d e t e r m i n e d b y t h e capacitor and resistor in the circuit i.

Enhancement added to this project: Doubt concerning the placement of IR sensor in the door frame. In cuonter cases lights are turned on even in daytime. Additional terminals are provided for triggering or resetting if desired.

The RFID sensor will be placed outside the room for the Entry and the infrared sensors will be placed at side of the door for the exit operation.

Output Current up to 1A 2. And counter will decrement if second sensor is interuppted first and then first sensor.

Automatic Room light Controller with Visitor Counter (AT89S52)

The light will be only switched OFF until all the persons in the room go out. Can u suggest any other sensors which will detect only human being or human body? Reset button will reset the microcontroller.

It should contrpller connected to second terminal of variable resistor RV. And the third terminal of potentiometer RV is left open. Reply Microtronics Technologies Post author 17 September, at 5: You will get a CD with this project: Since this project uses 2 infrared sensors, it can be used as Bidirectional person counter as well.