7 th sem project slides
TRANSCRIPT
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WIRELESS DATA AND WIRELESS DATA AND VOICE COMMUNICATION VOICE COMMUNICATION
THROUGH THROUGH INFRA-RED INFRA-RED LEDLED..
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ELEMENTS:ELEMENTS:
• MIKE: Its converts sound signals into electrical signals.MIKE: Its converts sound signals into electrical signals.• AMPLIFIER (A): Signals from mike are amplified so that AMPLIFIER (A): Signals from mike are amplified so that
it can drive to infrared-LED.it can drive to infrared-LED.• INFRARED-LED: It carries signals.INFRARED-LED: It carries signals.• PHOTO TRANSISTOR: The electrical signals are regained PHOTO TRANSISTOR: The electrical signals are regained
from the optical signals.from the optical signals.• AMPLIFIER (B): Energy of signals is amplified to drive AMPLIFIER (B): Energy of signals is amplified to drive
the speaker.the speaker.• SPEAKER: Electrical signals which are amplified are SPEAKER: Electrical signals which are amplified are
reconverted into sound signals at the speaker.reconverted into sound signals at the speaker.• DTMF CODER: It is generates the DTMF signal DTMF CODER: It is generates the DTMF signal
corresponding to the number entered from the corresponding to the number entered from the keyboard.keyboard.
• DTMF DECODER : It is fed to DTMF decoder which gives DTMF DECODER : It is fed to DTMF decoder which gives the binary output corresponding to the signal received the binary output corresponding to the signal received from the transmitter.from the transmitter.
• DECODER DRIVER : To drive the 7 segment display.DECODER DRIVER : To drive the 7 segment display.
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TRANSMISSION SECTION INFRA RED LED RECIEVER SECTION
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BLOCK DIAGRAMBLOCK DIAGRAM
MICROPHONE OP-AMP(INVERTED MODE)
push-pull amplifier(transistor BC.548/558)
DTMF CODER(UM912158)
IR LEDPHOTO
TRANSISTOR DTMF DECODER
(CM8870)DECODER(74LS47)
7 SEGMENTDISPLAY
SPEAKER
KEYPAD
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CIRCUIT DIAGRAM OF CIRCUIT DIAGRAM OF TRANSMITTER TRANSMITTER (VOICE)(VOICE)
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CIRCUIT DIAGRAM OF CIRCUIT DIAGRAM OF RECEIVER (VOICE) RECEIVER (VOICE)
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CIRCUIT DIAGRAM OF
TRANSMITTER
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CIRCUIT DIAGRAM OF RECEIVER
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COMPONENTS USED:COMPONENTS USED:COMPONENTS USED:COMPONENTS USED:
RESISTANCE:RESISTANCE:R1 150WR1 150WR2,R11,R12 100kWR2,R11,R12 100kWR3, R7 10KWR3, R7 10KWR4, R8 4.7kWR4, R8 4.7kWR5,R6,R9,R10 15KWR5,R6,R9,R10 15KWR13 220K WR13 220K WR14 1KWR14 1KWR15-R22 150WR15-R22 150WVR-1,VR-2 1MW Variable ResistanceVR-1,VR-2 1MW Variable Resistance
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• CAPACITOR:CAPACITOR:C1,C2,C4,C5 0.1 mfd (104 pf)C1,C2,C4,C5 0.1 mfd (104 pf)C3 220 mfdC3 220 mfdMIKE Condenser MicrophoneMIKE Condenser Microphone
• SEMICONDUCTOR:SEMICONDUCTOR:IC1- UM91215B (DTMF CODER)IC1- UM91215B (DTMF CODER)IC2, IC-3 741 (OP AMP)IC2, IC-3 741 (OP AMP)IC-4 CM8870 (DTMF DECODER)IC-4 CM8870 (DTMF DECODER)IC-5 74LS47 (DECODER)IC-5 74LS47 (DECODER)T1,T3 NPN BC548T1,T3 NPN BC548T2,T4 PNP BC558T2,T4 PNP BC558LED Light Emitting DiodeLED Light Emitting DiodePt. Photo TransistorPt. Photo Transistor
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MISCELLANEOUS:MISCELLANEOUS:
IC Base 8 Pin (2pcs.)IC Base 8 Pin (2pcs.)ZENER DIODE 3.2Volt ZENER DIODE 3.2Volt
Speaker 8 ohmsSpeaker 8 ohmsOptical Fiber General purposeOptical Fiber General purposePCB General purposePCB General purposeSlide Switch DPDTSlide Switch DPDTBattery 6 volt DCBattery 6 volt DC
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CONDENSER MICROPHONE:CONDENSER MICROPHONE:
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AMPLIFIER AMPLIFIER OP AMP IC 741 OP AMP IC 741
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TRANSISTOR NPN BC548TRANSISTOR NPN BC548
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PNP TRANSISTOR (BC 558)PNP TRANSISTOR (BC 558)
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INFRA RED LEDINFRA RED LED
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SPEAKER (8 ohm)SPEAKER (8 ohm)
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UM91214B DTMF ENCODER
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DTMF DECODER(CM8870)DTMF DECODER(CM8870)
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74LS4774LS47 (DECODER) (DECODER)
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7 SEGMENT DISPLAY
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SLIDE SWITCH DPDTSLIDE SWITCH DPDT
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HARDWARE SNAPSHOTHARDWARE SNAPSHOT
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THANK YOUTHANK YOU