Fm transmitter having 1km rang

                  Having range about (1 km )

Introduction:-

                       This type of circuit used to transmit wave of vice which carried by a carrier wave. It transmit between (88MHz to 108MHz). By a FM receiver we can hear that vice.this circuit has very perticular quality that by touching antina there will no distortion in signal because antina is not connected with capacitor this quality give it normal use for wire less transmition of vice our a long range .after make this adjust acpacitance of variable capacitor for modulation. if nat adjust then connect with me . I am a electrical engineer 

                  

                                     (Block Diagram)

Components List:-

1. REsistors

R1  = 5.6k R    

R2 = 22k R  

R3 = 1k R    

R4 = 220 R 

R5 = 47k R 

2.  Capacitors

C1 = .33uF  (electrolytic)                

C2 = 1pF  (ceramic )                      

C3 =  1pF   (ceramic )           

                  

C4 = 5-30pF   (This also called variable capacitor or trimmer)

 

C5 = 5-30pF (This also called variable capacitor or trimmer)

C6 = 5pF   (ceramic)  

      

C7 = 22pF   (ceramic)       

3.  Inductors

                                      

L1 =L2

4.   Transistors

Q1 = 2n3904 

Q2 = 2n3904  

5.   Audio jact  :-  you have use audio jact insteat of mic .

6.    Antina:= A impudence matching ANTENNA is must required in the circuit,without Antenna circuit will never works .Generally we uses a telescopic antenna . which through the waves in the atmosphere .

How it Works:-

FM ( Frequency Modulation of transmitted frequency and two for quality of vice i.e you reduce noise by tank circuit two    ) transmitter is work on  Frequency Modulation theory which describe below .Capacitor c4 and L1 is called tank circuit .also c5 and L2 is called tank circuit. Here the Frequency Modulation done. In Frequency Modulation our vice wave   Modulate  with carrier wave . which create a high frequency wave which can travel long then our vice wave and can receiver by FM   receiver at transmitted frequency which is (88MHz to 103MHz )tank circuit one is use for adjustment

Theory:-

IF YOU FACE ANY PROBLEM IS THIS EX> THEN YOU CAN

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03143231003 0r anus_latif@yahoo.com

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