Fm transmitter circuit
Power supply :- Using power supply stable DC voltage 2 V to 3.7 V max. You can only use battery because battery is perfect for this circuit battery output doesn't any noise.
Components :- Transistor BC 547, Resistance 100 ohm, 4.7 K ohm. Capacitor 1nF, 47pF, 22pF. Inductor 1uH. Condenser mic any.
Capacitor :- 1nF this capacitor number 102 non-polar, 22pF this capacitor number 22 non-polar, 47pF this capacitor number 47 non-polar.
Inductor :- This part important part for any transmitter circuit, 1uH 5Turn 24SWG.
Transistor :- BC 547 is an NPN Bipolar junction transistor. It is commonly used to amplify current. A small current at its base controls a larger current at collector & emitter terminals. It has a transition frequency range up to 100 MHz. When using the transistor as a switch, the max current rating poses a limit on the type of loads that it can drive.
Working :- The FM transmitter is a circuit that uses a very low power to operate and does uses (Frequency Modulation) FM Waves to transmit the sound. With the help of such FM transmitters we can easily transmit the audio signals through the carrier waves with different frequencies. First condenser microphone enter voice signal than go to amplification or filter than go to transistor base and transistor switch to activate VCC come out to inductor than generate frequency inductor noise filter 22pF capacitor vcc go through transistor collector to emitter through 100 ohms resistance and transistor collector noise clear through 47pF.
See Next part using crystal
Sir are really work ?because it not have LC circuit to make fm please reply me sir💖
ReplyDeleteYes it's working
DeleteIt's Working it's not lc circuit this is radio Transmitter circuit
Deletewhich is negative of mic
ReplyDeleteNegative side of supply
Deletehow should we give the antenna?
ReplyDeleteU can use antenna to more range
DeleteIn which fm frequency?
ReplyDeletePlease tell me
100MHz
DeleteWhich distance
ReplyDelete500 metre
Delete