Laser Torch

major PROJECT LASER TORCH BASED case pointter AND RECEIVER CHAPTER -1 INTRODUCTION 1.1 ABOUT PROJECT LASER TORCH-BASED vowelise sender AND RECEIVER Using this racing lot you bay window communicate with your neighbors wirelessly. Instead of RF signals, light from a visual maser torch is used as the carrier in the circuit. The opthalmic maser torch can transmit light up to a distance of about viosterol meters. The photo junction electronic transistor of the receiver must be accurately oriented towards the laser beam from the torch. If there is any(prenominal) obstruction in the cart span of the laser beam, no sound will be divulge from the receiver. The vector circuit comprises condenser microphone transistor amplifier BC548 (T1) followed by an opamp stage built around µA741 (IC1). The gain of the op-amp can be wangleled with the help of 1-mega-ohm pot meter VR1. The AF output from IC1 is coupled to the stand of transistor BD139 (T2), which, in turn, modul ates the laser beam. The transmitter uses 9V power supply. However, the 3-volt laser torch (after removal of its battery) can be immediately addicted to the circuitwith the body of the torch connected to the emitter of BD139 and the spring-loaded trait protruding from inside the torch to circuit ground.

The receiver circuit uses an npn phototransistor as the light sensor that is followed by a two-stage transistor preamplifier and LM386-based audio power amplifier. The receiver does non need any mixed alignment. Just play along the phototransistor oriented towards the remote transmitters laser point and adjust the volum e control for a clear sound. To avoid 50Hz h! um noise in the speaker, keep the phototransistor away from AC light sources such as bulbs. The reflected sunlight, however, does not cause any problem. But the sensor should not directly face the sun. DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGG, HARYANA COLLEGE OF TECHNOLOGY AND MANAGEMENT, KAITHAL-136027 1  study PROJECT LASER TORCH BASED VOICE sender AND RECEIVER 1.2 Laser information page 1....If you want to startle a full essay, order it on our website: OrderCustomPaper.com

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