logging in or signing up 3 stage fm transmitter smarty49 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 3389 Category: Science & Tech.. License: All Rights Reserved Like it (10) Dislike it (0) Added: August 20, 2010 This Presentation is Public Favorites: 4 Presentation Description No description available. Comments Posting comment... By: jyotsna.alapati (16 month(s) ago) plz snd me tis ppt to my mail jyotsna.alapati@gmail.com plz its very urznt Saving..... Post Reply Close Saving..... Edit Comment Close By: mr.ravi427 (27 month(s) ago) hi pls snd me tis ppt to tis mail mr.ravi427@gmail.com plzzzzzzzzz its very urznt........ Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript 3 Stage FM Transmitter : 3 Stage FM Transmitter GUIDED BY:- k.v.satyanarayana SWARNANDHRA INSTITUTE OF ENGINEERING & TECHNOLOGY DEPARTMENT OF ELECTRONICS AND COMMUNICATION TEAM MEMBERS:- P.GOPI KRISHNA PRASAD (07EM1A0463) CH.RAJ KUMAR (07EM1A0449) R.RAVI TEJA (07EM1A0439) D.V.S.S.REVANTH (07EM1A0404) A.BHAVANI SHANKAR (08EM5A0405) (HEAD OF THE DEPT.) ABSRACT : ABSRACT F.M. TRANSMITTER HAS 3 R.F STAGES .A VARIABLE FREQUENCY OF VHF OSCILLATOR,C CLASS DRIVER STAGE AND FINAL POWER AMPLIFIER FREQUENCY OF TRANSMITTTER CAN BE SET WITH IN 88-108MHZ. F.M. BROAD CAST BY ADJUSTING FIRST TRIMMEROR SPACING BETWEEN OSCILLATOR COIL TURNS. INTRODUCTION : INTRODUCTION RF OSCILLATOR OPERATES AROUND 100MHZ ELECTRET MICROPHONE FIRST AMPLIFICATION STAGE OSCILLATOR STAGE FINAL AMPLIFICATION STAGE DIPOLE ANTENNA CIRCUIT DIAGRAM OF FM TRANSMITTER : CIRCUIT DIAGRAM OF FM TRANSMITTER ASSEMBLY INSTRUCTIONS : ASSEMBLY INSTRUCTIONS COMPONENTS MAY BE ADDED TO THE PCB IN ANY ORDER . THE TWO 100n CAPACITORS ON PCB HAVE 0.2 AND 0.1 SPACING. A CONNECTION IS REQUIRED FROM THE MIDDLE OF L1 TINNED COPPER WIRE COIL TO THE PAD MARKED TAP NEXT TO THE COIL. MAKE SURE NONE OF THE LOOPS OF THE COIL ARE TOUCHING THE LOOP NEXT TO IT. PAY SPECIAL ATTENTION TO THE SOLDER JOINT IN CASE ALL THE ENAMEL HAS NOT BEEN REMOVED. TRIMMER CAPACITANCE : TRIMMER CAPACITANCE THE SLOTS INSIDE THE TRIM CAP ARE SHAPED LIKE THE HEAD OF AN ARROW . TO GET THE MAXIMUM CAPACITENCE VALUE ARROW IS POINTED TO 12 O’ CLOCK POSITION,THE 180 o’ TURN GIVES MINIMUM RATED VALUE. WE CAN CHANGE THE FREQUENCY BY ALTERING THE SPACE BETWEEN THE COILS OF L1. Slide 7: THE 10pf CERAMIC CAPACITOR IN PARALLEL WITH THE RED TRIM CAP. WE CAN TUNE Tx IN THE 98 MHZ TO 105 MHZ RANGE OF COMMERCIAL FM BAND . THE YELLOW TRIM CAP IS USED TO TUNE THE Tx TO A CLEAR PART OF BAND. WHITE CAN BE USED TO FINE TUNE THE Tx TO THE DESIRED FREQUENCY. SPREAD THE L1 COIL WIDE APART. TRIMMER CAPACITANCE Slide 8: POOR SOLDERING IS THE MOST LIKELY REASON THAT THE CIRCUIT DOES NOT WORK. CHECK ALL THE SOLDERING JOINTS CAREFULLY UNDER A GOOD LIGHT. CHECK ALL THE COMPONENTS ARE PLACED IN THE CORRECT POSITION OR NOT ON THE PCB. CHECK WEATHER YOU REALLY SPREAD OUT THE COILS OF L1? USE A MULTIMETER FOR CHECKING PURPOSE. TROUBLE SHOOTING Slide 9: A PEAKING CIRCUIT IS SIMPLY AN RF DETECTOR THAT USES DIODES TO CHARGE A CAPACITOR. THE VOLTAGE ACROSS THE CAPACITOR IS SET TO A RANGE 2 0R 20 VOLTS. THE OUTPUT SHOULD BE CONNECTED DIRECTLY TO THE VOLT METER. THE INPUT TO THE PEAKING CIRCUIT IS SOLDED TO THE ANTENNA WIRE HOLE OF LENGTH 5 cm. PEAKING CIRCUIT Slide 10: THE FM TRANSMITTER WAS DESIGNED TO OPERATE FROM 9v DC, HOWEVER YOU CAN INCREASE THE OUTPUT POWER BY USING A 12v OR 15v DC SUPPLY. IF YOU TRY THIS THEN THE VALUES OF SOME RESISTANCE WILL HAVE TO CHANGE. OPERATING VOLTAGE Slide 11: ONCE YOU HAVE ASSEMBLED YOUR TRANSMITTER YOU WILL HAVE TO TUNE IT TO A FREQUENCY ON FM BROADCAST BAND. TUNE YOUR FM RECEIVER TO A PART OF THE DIAL WHERE YOU CAN NOT HEAR ANY RADIO STATIONS. BY TAPPING THE MICROPHONE YOU WILL HEAR YOUR SIGNAL, IF YOU DON’T THEN CONTINUE TUNING UNTIL YOU CAN. USE THE WHITE TRIM CAPACITOR TO FINE TUNE THE TRANSMITTER TO THE RECEIVER. TUNING THE FM TRANSMITTER Slide 12: EDUCATIONAL PURPOSE. HOME INTERCOM. NATURE RESEARCH. COMMERCIAL. USES & ADVANTAGES LOW COST. EASY TO CARRY. HIGH MOBILITY. HIGH S/N RATIO. FUTURE SCOPE:- YOU CAN GET MORE RANGE BY REDUCE R5,R7 TO 100R,47R AND INCREASE C7 TO 470P. USING OF YAGI’S IN PLACE OF DIPOLE ANTENNA TO IMPROVE COVERAGE AREA. Slide 13: HENCE WE CONCLUDE THAT BY USING THE FM TRANSMITTER WE CAN TRANSMIT AUDIO SIGNAL S UPTO SOME EXTENT AND WE CAN INCREASE THE COVERAGE AREA BY CHANGING SOME SPECIFICATIONS IN THE CIRCUIT. CONCLUSION Slide 15: T H A N ‘ Q , You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
3 stage fm transmitter smarty49 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 3389 Category: Science & Tech.. License: All Rights Reserved Like it (10) Dislike it (0) Added: August 20, 2010 This Presentation is Public Favorites: 4 Presentation Description No description available. Comments Posting comment... By: jyotsna.alapati (16 month(s) ago) plz snd me tis ppt to my mail jyotsna.alapati@gmail.com plz its very urznt Saving..... Post Reply Close Saving..... Edit Comment Close By: mr.ravi427 (27 month(s) ago) hi pls snd me tis ppt to tis mail mr.ravi427@gmail.com plzzzzzzzzz its very urznt........ Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript 3 Stage FM Transmitter : 3 Stage FM Transmitter GUIDED BY:- k.v.satyanarayana SWARNANDHRA INSTITUTE OF ENGINEERING & TECHNOLOGY DEPARTMENT OF ELECTRONICS AND COMMUNICATION TEAM MEMBERS:- P.GOPI KRISHNA PRASAD (07EM1A0463) CH.RAJ KUMAR (07EM1A0449) R.RAVI TEJA (07EM1A0439) D.V.S.S.REVANTH (07EM1A0404) A.BHAVANI SHANKAR (08EM5A0405) (HEAD OF THE DEPT.) ABSRACT : ABSRACT F.M. TRANSMITTER HAS 3 R.F STAGES .A VARIABLE FREQUENCY OF VHF OSCILLATOR,C CLASS DRIVER STAGE AND FINAL POWER AMPLIFIER FREQUENCY OF TRANSMITTTER CAN BE SET WITH IN 88-108MHZ. F.M. BROAD CAST BY ADJUSTING FIRST TRIMMEROR SPACING BETWEEN OSCILLATOR COIL TURNS. INTRODUCTION : INTRODUCTION RF OSCILLATOR OPERATES AROUND 100MHZ ELECTRET MICROPHONE FIRST AMPLIFICATION STAGE OSCILLATOR STAGE FINAL AMPLIFICATION STAGE DIPOLE ANTENNA CIRCUIT DIAGRAM OF FM TRANSMITTER : CIRCUIT DIAGRAM OF FM TRANSMITTER ASSEMBLY INSTRUCTIONS : ASSEMBLY INSTRUCTIONS COMPONENTS MAY BE ADDED TO THE PCB IN ANY ORDER . THE TWO 100n CAPACITORS ON PCB HAVE 0.2 AND 0.1 SPACING. A CONNECTION IS REQUIRED FROM THE MIDDLE OF L1 TINNED COPPER WIRE COIL TO THE PAD MARKED TAP NEXT TO THE COIL. MAKE SURE NONE OF THE LOOPS OF THE COIL ARE TOUCHING THE LOOP NEXT TO IT. PAY SPECIAL ATTENTION TO THE SOLDER JOINT IN CASE ALL THE ENAMEL HAS NOT BEEN REMOVED. TRIMMER CAPACITANCE : TRIMMER CAPACITANCE THE SLOTS INSIDE THE TRIM CAP ARE SHAPED LIKE THE HEAD OF AN ARROW . TO GET THE MAXIMUM CAPACITENCE VALUE ARROW IS POINTED TO 12 O’ CLOCK POSITION,THE 180 o’ TURN GIVES MINIMUM RATED VALUE. WE CAN CHANGE THE FREQUENCY BY ALTERING THE SPACE BETWEEN THE COILS OF L1. Slide 7: THE 10pf CERAMIC CAPACITOR IN PARALLEL WITH THE RED TRIM CAP. WE CAN TUNE Tx IN THE 98 MHZ TO 105 MHZ RANGE OF COMMERCIAL FM BAND . THE YELLOW TRIM CAP IS USED TO TUNE THE Tx TO A CLEAR PART OF BAND. WHITE CAN BE USED TO FINE TUNE THE Tx TO THE DESIRED FREQUENCY. SPREAD THE L1 COIL WIDE APART. TRIMMER CAPACITANCE Slide 8: POOR SOLDERING IS THE MOST LIKELY REASON THAT THE CIRCUIT DOES NOT WORK. CHECK ALL THE SOLDERING JOINTS CAREFULLY UNDER A GOOD LIGHT. CHECK ALL THE COMPONENTS ARE PLACED IN THE CORRECT POSITION OR NOT ON THE PCB. CHECK WEATHER YOU REALLY SPREAD OUT THE COILS OF L1? USE A MULTIMETER FOR CHECKING PURPOSE. TROUBLE SHOOTING Slide 9: A PEAKING CIRCUIT IS SIMPLY AN RF DETECTOR THAT USES DIODES TO CHARGE A CAPACITOR. THE VOLTAGE ACROSS THE CAPACITOR IS SET TO A RANGE 2 0R 20 VOLTS. THE OUTPUT SHOULD BE CONNECTED DIRECTLY TO THE VOLT METER. THE INPUT TO THE PEAKING CIRCUIT IS SOLDED TO THE ANTENNA WIRE HOLE OF LENGTH 5 cm. PEAKING CIRCUIT Slide 10: THE FM TRANSMITTER WAS DESIGNED TO OPERATE FROM 9v DC, HOWEVER YOU CAN INCREASE THE OUTPUT POWER BY USING A 12v OR 15v DC SUPPLY. IF YOU TRY THIS THEN THE VALUES OF SOME RESISTANCE WILL HAVE TO CHANGE. OPERATING VOLTAGE Slide 11: ONCE YOU HAVE ASSEMBLED YOUR TRANSMITTER YOU WILL HAVE TO TUNE IT TO A FREQUENCY ON FM BROADCAST BAND. TUNE YOUR FM RECEIVER TO A PART OF THE DIAL WHERE YOU CAN NOT HEAR ANY RADIO STATIONS. BY TAPPING THE MICROPHONE YOU WILL HEAR YOUR SIGNAL, IF YOU DON’T THEN CONTINUE TUNING UNTIL YOU CAN. USE THE WHITE TRIM CAPACITOR TO FINE TUNE THE TRANSMITTER TO THE RECEIVER. TUNING THE FM TRANSMITTER Slide 12: EDUCATIONAL PURPOSE. HOME INTERCOM. NATURE RESEARCH. COMMERCIAL. USES & ADVANTAGES LOW COST. EASY TO CARRY. HIGH MOBILITY. HIGH S/N RATIO. FUTURE SCOPE:- YOU CAN GET MORE RANGE BY REDUCE R5,R7 TO 100R,47R AND INCREASE C7 TO 470P. USING OF YAGI’S IN PLACE OF DIPOLE ANTENNA TO IMPROVE COVERAGE AREA. Slide 13: HENCE WE CONCLUDE THAT BY USING THE FM TRANSMITTER WE CAN TRANSMIT AUDIO SIGNAL S UPTO SOME EXTENT AND WE CAN INCREASE THE COVERAGE AREA BY CHANGING SOME SPECIFICATIONS IN THE CIRCUIT. CONCLUSION Slide 15: T H A N ‘ Q ,