LASER TORCH BASED VOICE TRANSMITTER AND RECEIVER
Using this circuit you can communicate with your neighbors wirelessly. Instead of RF signals, light from a laser torch is used as the carrier in the circuit. The laser torch can transmit light up to a distance of about 500 meters. The phototransistor of the receiver must be accurately oriented towards the laser beam from the torch. If there is any obstruction in the path of the laser beam, no sound will be heard from the receiver. The transmitter circuit (Fig. 1) comprises c ....etc

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Laser Transmitter Plus Receiver

Transmitter is a laser tube connected to high voltage supply.The message to be transmitted is supplied to Audio in side with resistance of the coil 8ohm.The other side coil has resistance 2000ohm. When audio signal is given to the coil it modulates the high voltage supply and lazer tube will emit laser light in proportional to the sound signal .

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This article is presented by: Sameer Lakhra, Davinder Pal Sharma and Dr. Jasvir Singh



ABSTRACT



Laser as a communication medium can provide a good substitute for the present day communication systems as the problem of interference faced in case of electromagnetic waves is not there and high deal of secrecy is available. Use of laser in communication systems is the future because of the advantages of the full channel speeds, no communication licenses required at present , compa ....etc

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Carpooling (also car-sharing, ride-sharing, lift-sharing and covoiturage) is the sharing of car journeys so that more than one person travels in a car.

By having more people using one vehicle, carpooling reduces each person's travel costs such as fuel costs, tolls, and the stress of driving. Carpooling is also a more environmentally friendly and sustainable way to travel as sharing journeys reduces carbon emissions, traffic congestion on the roads, and the need for parking spaces. Authorities often encourage carpooling, especially during per ....etc

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ABSTRACT

Using this circuit you can communicate with your neighbours wirelessly. Infrared signals are used as the carrier in the circuit. The infrared signals can transmit up to a distance of about 5 meters. The phototransistor of the receiver must be accurately oriented towards the IR beam. If there is any obstruction in the path of the IR beam, no sound will be heard from the receiver.
CHAPTER 1
INTRODUCTION:
IR-BASED VOICE TRANSMITTER AND RECEIVER, the aim of the project is to communicate wirelessly. In this project w ....etc

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