Digital Visitor Counter Feb./26/2011

C.G.Patel Inst. of Tech.

Digital Visitor Counter

Electronics & Comm. (4th Sem.)

Kunjan Pathak - 090530111001

Jigar Patel - 090530111020

Dharmesh Patel - 090530111010

Jaypalsinh Mahida - 090530111031

Nilay Patel - 090530111030

Digital Visitor Counter Feb./26/2011

Digital Visitor Counter

Introduction: Digital visitor counter is a reliable circuit that

takes over the task of counting Number of Persons/ Visitors in the

Room very accurately.

Principle: When anybody enters into the Room then the Counter

is Incremented by one and when any one leaves the room then the

Counter is Decremented by One. The total number of Persons inside

the Room is displayed on the seven segment displays.

Working Overview: The microprocessor do the above job it

receives the signals from the sensors, and this signals operated under

the control of software which is stored in the Memory. The sensors are

made with help of LDRs which are Light Dependent Resistors, whose

Resistance is inversely proportional to the Light falling on it. The Laser

Torch is used as the Light source and it is focused on the LDRs, the

Microprocessor continuously watches the LDRs.

Fundamental Flow of Working:

1

Digital Visitor Counter Feb./26/2011

Flow Chart:

2

Digital Visitor Counter Feb./26/2011

Circuit Diagram:

3

Digital Visitor Counter Feb./26/2011

Remark:

4