![]() The non-inverting pin is connected to the positive side of 10k resistor of IR receiver and the inverting pin is connected to the potentiometer. 1- OPERATIONAL AMPLIFIER LM358: In our circuit we had used the op-amp 358 as comparator i.e. ![]() The resistance of the IR receiver decreases and the voltage drop across the 10k resistor increases.įrom the positive end of the 10k resistor we had in turn taken a connection for pin-2 (non-inverting pin) of IC 358. When IR rays from transmitter falls on receiver. The IR receiver is reverse biased with 5v source and a 10k current limiting resistor. In the circuit we had used two IR led to extend the range of rays. The IR transmitter is forward biased with 5 volt source and 120 ohm resistor. INFRARED TRANSMITTER AND RECIVER: The infrared transmitters and receiver are used to sense the object that passes through it. The pin configuration of the IC7805 is shown in fig-1. So to provide 5v we had used the regulator IC7805 and connected it to the 9v battery.īy doing so, we had connected the output and ground from IC7805 to our circuit. SOURCE: As we are designing a digital circuit and we have idea that all digital circuits requires 5v maximum. There are many different ways to design a circuit for counting device but before discussing that we need to understand the components used for its circuit. The method of originating the gadget, and problems faced are also highlighted in the report. ![]() The report on project “Visitors’ Counter” covers the gadget objectives, its uses, the diagram, lay out, design, component, power supplies, etc. The gadget can be used in almost all spheres of life. A shepherd with larger number of cattle in a herd to drive may use it to keep his cattle counting true and systematic which bring them out for grazing and back from the yard to the barn ()باڑہ. The counter is, though, a small gadget yet it helps to count the public entered to any of the service delivery center or to a ware house where from supplies are made either in bulk to keep the “enter” and “exit” record. ![]() Bidirectional Visitor Counter CONSTRUCTION. ![]() The total number of object is displayed on the seven. This project we will create counter system for apply. “Bidirectional Visitor Counter with Automatic Room Light Controller and Arduino as the master controller” is designed and presented in order to count the visitors of an auditorium, hall. The data collection for assessment of needs, requirements, deliverables lead to better planning and development. INTRODUCTION The electronic gadgets made the human life comfortable, systematic, more predictable for the future. ![]()
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