POWER FULL LONG RANGE FM TRANSMITTER

Circuit Diagram

Power supply

Using power supply stable DC voltage 5V max. You can only use battery because battery is perfect for this circuit battery output doesn't any noise.

Components

Transistor BC547, Resistance 100 ohms, 4.7K ohms, 1K ohms, 27K ohms. Capacitor 0.2uF, 0.5uF, 0.047uF, 6.8pF, 22pF. Inductor 1uH. Condenser mic any.

Resistance

Using resistance 100 ohme +-5% changing 1/3watt, 4.7K ohms +-5% changing 1/3watt, 1K ohms +-5% changing 1/3watt, 27K ohms +-5% changing 1/3watt.

Capacitor

0.5uF this capacitor number 504 non-polar, 33pF this capacitor number 33 non-polar, 6.8pF this capacitor number 6.8 non-polar, 0.2uF this capacitor number 204.

Inductor

This part important part for any transmitter circuit, 1uH 5Turn 24SWG.

Transistor

BC547 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. Frist 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.

Full Circuit digiram

Full Circuit with frequency curve

Amplifier Circuit

Oscillator

LC Circuit

Comments

Fm transmitter circuit

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 . Resistance :- Using resistance 100 ohm +-5% changing 1/3 watt, 4.7 K ohm +-5% changing 1/3 watt. 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 cur

MINI ROBOT

Make a mini robot Use resistance - 10K ohms Use variable resistance -10K ohms Use switch - puss on Arduino nano 2.0

Automatic home appliances

Automatic Home Appliances Remote control electrical appliances Setting up IR sensor connection to Atmega 328P is very simple. Beside VCC and GND pin , the sensor has only one output pin that should be connected to one of digital pins of the Atmega 328P. HC - 05 has red LED which indicates connection status, whether the Bluetooth is connected or not. Before connecting to HC - 05 module this red LED blinks continuously in a periodic manner. When it gets connected to any other Bluetooth device, its blinking slows down to two seconds. This module works on 3.3 V - 6V but you can use only 5V DC. this module use any Serial AMS1117 is a popular SMD package 3-pin voltage regulator that is available in many models for fixed and adjustable voltage requirements. The IC can deliver a maximum current of 1A and the output voltage can vary from 1.5V to 5V. It also has a low drop out voltage of 1.3V when operating at maximum current. pin number 1 GND, pin 2 OUTPUT,

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