After receiving signal from sensor microcontroller will define whether it was enter or exit by using following algorithm.
The main function of this block is to provide the required amount of voltage to essential circuits. Infra red sensors are a type of light sensors they function in the infra red part of the frequency spectrum. Microcontroller 89s52 continuously monitor the Infrared Receivers.
By using this sensor and its related circuit diagram we can count the persons. 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.
In this circuit, two infrared IR sensor modules are used each for up and down counting, respectively. The data pins of each 7-segment display are connected to port P2 of the microcontroller AT89C A primary method for counting the visitors involves hiring human auditors to stand and manually tally the number of visitors who pass by a certain location.
After joining as member post your request in comments. This project can be used to count and display the number of visitors entering inside any conference room or seminar hall.
Advantage o Low cost o Easy to use o Implement in single door Disadvantage It is used only when one single person cuts the rays of the sensor hence it cannot be used when two person cross simultaneously………………………………….
CL is to trigger the IC which is configured as monostable multivibrator. Moreover it can also be used to check the number of people who have come to an event or a museum to watch a certain exhibit.
It receives the signals from the sensors, and this signal is operated under the control of software which is stored in ROM. Entry and Exit sensor circuit 3. IR sensors are active sensors they consist of an emitter and a Receiver.
If the sensor 1 is interrupted first then the microcontroller will look for the sensor 2. In the down mode, it can count the number of persons leaving the hall by decrementing the count at exit gate.
This circuit divided in three parts: The IR signals from the IR LEDs should continuously fall on the respective phototransistors, so proper orientation of the transmitters and phototransistors is necessary.
The sensor inputs are defined as up and down selector modes for the counter in the code. At each step, the value of the counter is sent to be displayed on the segments.
For sensing the person and light we are using the light dependent register LDR. The microcontroller controls counting and displays the number of persons present inside the hall is also displayed on the seven segment displays.
It got its name from the fact that only one of its output states is stable. The IC in the transmitter side is to generate 36 kHz square wave. Whenever an interruption is observed by the first IR sensorit increments the counter value. The same count is displayed on a set of 7-segment displays through the controller.
Receiver Circuit Sensors 1. It receives the signals from the sensors, and this signal is operated under the control of software which is stored in ROM. Two similar sections detect interruption of the IR beam and generate clock pulse for the microcontroller.
If the sensor 2 is interrupted first then the microcontroller will look for the sensor 1. Block Diagram The basic block diagram of the bidirectional visitor counter with automatic light controller is shown in the above figure. We will be showing bothe In count i. All the components required are readily available in the market and the circuit is easy to build.
Similarly, when the second sensor detects an obstacle, the count is decremented. There are two main parts of the circuits. Counting the visitors helps to maximize the efficiency and effectiveness of employees, floor area and sales potential of an organization.
This circuit, in effect, produces a pulse at pin 3 whose width t is just the product of R1 and C1, i. And if it is interrupted then the microcontroller will increment the count.
Two IR transmitter-receiver pairs are used at the passage: LCD displays this value which is placed outside the room.
The output goes high when the there is an interruption and it return back to low after the time period determined by the capacitor and resistor in the circuit.Bidirectional Visitor Counter 1.
Introduction This project titled “Microcontroller based Bidirectional Visitor counter” is designed and presented in order to count the visitors of an auditorium, hall, offices, malls, sports venue, etc/5(6).
A Bidirectional Visitor Counter using AVR ATmega16; A Bidirectional Visitor Counter using AVR ATmega Share. Share.
Tweet. It is bidirectional, that means if a person enter the room, it will increment the count and if a person leaves the room then it will decrement the counter. The count is displayed in a 3 digit seven segment display. Mar 03, · 1. Bidirectional Visitor Counter Circuit using Microcontroller 2.
Automatic bidirectional visitor counter using 3. Bidirectional Visitor Counter 4. as described above that bidirectional counter is used to inc n decreament the number of the visitors entering or leaving the room mi-centre.com what is the need or application to decreament the number of the visitors leaving the room.
SATISH CHANDER SG W BIDIRECTIONAL VISITOR COUNTER INTRODUCTION A counter that can change its state in either direction, under control of an up–down selector input, is known as an up– down counter.
Watch video · Often we see visitor counters at stadium, mall, offices, class rooms etc. Today we are here with automatic room light controller project with bidirectional visitor counter by using Arduino Uno.
News ; Articles Automatic Room Light Controller with Bidirectional Visitor Counter embedded. By Saddam OctDownload