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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Output signal from AT89S52 is given to the base of the transistor, which we are further energizing the particular relay. LTS Common Anode is used for 7-Segment display and that time Relay will get voltage and triggered, so light will get voltage and it will turn on and when counter will be 00 and at that time Relay will be turned off.

You will get a CD with this project: Light sensor — LDR will detect the sunlight in the room or we can say LDR is used to detect daytime If there is enough sunlight in the room which means it is a daytime then the relay will not be turned on even if the person count is greater than zero. However it will be a really complicated task since it involves lots of wiring connections.

When number of persons inside the room is zero, lights inside the room are turned off using a relay interface.

Use a potentiometer to adjust the frequency of transmitter circuit.

It auto activate the landline number and redial the last dialed number from the conventional telephone. We have used to 2 pairs rlom Transmitter and receiver. And if any person leaves the room then second receiver will cut and then first receiver will cut. In this project we have set the limit to 15 for demo purpose.


Automatic Room light Controller with Visitor Counter (AT89S52)

Reply Deepthi 2 July, at 7: I got Output of project is as mentioned on website. And output of Darlington pair is given to IR led, thus it increases current through Infrared LEDs which helps in increasing the range of infra-red rays emitted llight IR leds. And the third terminal of potentiometer RV is left open. Below is the diagrammatic aautomatic on how the two sensors should be placed on the door frame http: One relay driver circuit we are using to control the light.

Automatic Room light Controller with Visitor Counter | Neeraj Sharma –

I have prepared the circuit of timer which is giving output of 38khz. Reply Microtronics Technologies Post author 17 September, at 5: List of Components 5. We have implemented the Person counter module using 2 transmitters and 2 receivers.

Reply Dilawer 11 February, at 9: The total number of persons inside the room is also displayed on the seven segment displays. Suppose two people walk into the room in matching steps interval will it sense one intrusion? Disc capacitor — ,33pF 7. Also if at all one wants to know the number of people present in room soaps not to have congestion, this circuit proves to be helpful.

You have to remove transformer wires and at the same point you can give 9 volt DC supply. We have used 12 volt relay. When the last person leaves the room then counter goes to 0 and that time the relay will turn off, and light will be turned off. I purchase project and got it within promised time. But then all these devices will be turned on or off at the same time.

If yes then at what point we can connect the DC supply coz then we gave to skip the dc converter circuit? Microcontroller Program in assembly language 5.


One of these 2 pins is connected to the Normally open terminal of the Relay which is also known as NO contact. Automatic Room light Controller with Visitor Counter. By using this sensor and its related circuit diagram we can count the persons.

Reply Felix 2 October, at 1: You will get all documents after purchasing the project. Although there are different functions for LCD and person wtih modules, but eoom are combined in a single program. Initially second sensor will be activated visitkr later first sensor will be activated. But the IR receiver is not giving active low output.

Automatic Room light Controller with Visitor Counter (AT89S52)

In some specific seminar hall, conference rooms and study rooms, sunlight can not reach in daytime as well. The various functions of Microcontroller are like: And is the microcontroller need to be programmed? Input is given to wit Port 1of the microcontroller. Because when there is nobody inside the room then lights are automatically turned off.

So it can detect the person but it gets difficult to understand if the person is entering in the room or leaving the room. We have used 2 infrared sensors and these are installed on door. In these cases lights are turned on even in daytime. There is auto,atic waiting period of 5 seconds.

Counter will increment if first sensor is interrupted first and then second sensor. Operates in both as table and monostable modes 4. Reply Microtronics Technologies Post author 4 October, at 5: