Laser communication is a new advanced communication strategy in the field of wireless communication. Several powerful communication technologies are being developed nowadays. Apart from those technologies laser communication systems have myriad of applications just like the one we did.
In this project we transmit data by means of lasers instead of radio frequency(RF) signals, the laser torch acts as a carrier for the signal transmission. We used laser torches which can transmit the light up to the distance of 500 meters. The circuit had two major parts. One of them is the transmitter circuit and the other is the receiver circuit...
The transmitter circuit consists of microphone transistor amplifier BC548, op amp μA741, and 1-mega-ohm pot meter with 9v input power supply.
The receiver section comprises of NPN phototransistor for sensing the light, pre-amplifier to amplify the low amplitude signals, bypass capacitor for the prevention of loss of amplification, loudspeaker of 0.5W.
Condenser micro phone:
The use of the condenser micro phone is to produce a good quality audio signal to the user; these are highly sensitive in terms of capturing very little sounds and amplifying them to audible frequency. LM386 power amplifier with low power applications is used in this system in order to amplify the low power signals.
Schematics & PCB
Download Project Report on Laser Based Communication System
keywords: Hardware Project , laser based image communication