Laser Transmitter Plus Receiver

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Laser Transmitter Plus Receiver Powered By Docstoc
					LASER TRANSMITTER PLUS RECEIVER

TRANSMITTER




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



RECEIVER




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The receiver consists of 741 Op Amp , LM386 Audio Amp , NPN Phototransistor.
When modulated lazer beam strikes phototransistor it gets biased and corresponding electric
signal will generate.This will gets amplified by Opamp and gives the output to audio amplifier
and then to the speaker.

Parts are


C1, C2          2                0.1uf Ceramic Disc Capacitor

C3              1               100uf 25V Electrolytic Capacitor

U1174              1            Op Amp

U2                 1             LM386 Audio Amp

SPKR               1            18 Ohm Speaker

T1              1                8Ohm: 2K Audio Transformer

R1              1                 100K Ohm 1/4W Resistor

R2              1                1M Ohm 1/4W Resistor

R3             1                  10K Potentiometer

Q1              1                 NPN Phototransistor

MISC           1                  Wire, Board, Knob For R3, LASER Tube and Power Supply




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posted:8/7/2012
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