Simple FM Transmitter only with single Transistor September 9, 2018 admin 0 I was looking for a project to make for fun when I found this Simple FM transmitter, I got curious because it is the best project for fun as well as y

Simple FM Transmitter only with single Transistor September 9, 2018 admin Electronics Projects, FM Transmitters 0 I was looking for a project to make for fun when I found this Simple FM transmitter, I got curious because it is the best project for fun as well as youtube, it is a simple FM transmitter but I make it the simplest. I replaced the variable capacitor with a fixed one, re-calculated its frequency to be able to tune it only by the coil instead of the variable capacitor. This circuit design is unstable because its resonant frequency drifts off if you get your hands close to the antenna or the circuit, the length of the antenna affects the resonant frequency so you should fix it on a fixed place so that its frequency remains constant. Note: It is a very simple transmitter but its range can be 2 km if u attach a long antenna with it. Circuit Diagram of Simple Fm Transmitter If you want to buy simple FM transmitter Then Please visit Circuit given below in very low price   Buy Ready Made FM Transmitter Online Components Required R1: 100ohm resistor R2: 4.7 ohms resistor C1: 1nF ceramic capacitor C2: 47pf ceramic capacitor Q3: bc2655,2n222 or 2N3094 L: 212nH (5 turns of 15 gauge copper wire) Mic: Condenser  mic Bat: 3v battery and its holder Ant: Ideally a piece of wire, 1/4 or 1/2 of the wavelength of the frequency. If you want more range then use roof antenna and adjust frequency to increase and decrease the space between the inductor coil. Note         6v battery can be used to increase the range of this transmitter  Circuit Diagram Working of FM Transmitter Circuit The following circuit diagram shows the FM transmitter circuit and the required electronic and electrical components. This circuit includes a power supply of 3v to 6V, capacitor, resistor, induct-or, mic, and antenna. Let us consider the microphone to understand the sound signals and inside the mic, there is a presence of a captive sensor. It produces according to the vibration to the change of air pressure and the AC signal. The formation of the oscillating tank circuit can be done through the transistor of sc2655 by using the inductor and capacitor. The transistor used in this circuit is a general-purpose amplification transistor. If the current is passed at the induct-or coil and capacitor then the tank circuit will oscillate at the resonant carrier frequency of the FM modulation. The negative feedback will be the capacitor to the oscillating tank circuit. FM transmitter circuit requires an oscillator  To generate the radio frequency carrier waves.   The tank circuit is derived from the LC circuit to store the energy for oscillations. The input audio signal from the mic penetrated to the base of the transistor, which modulates the LC tank circuit carrier frequency in FM format. The variable capacitor can be used to change the resonant frequency for fine modification to the FM frequency band but I did not use a variable capacitor because I have to make it very simple for students. The modulated signal from the antenna is radiated as radio waves at the FM frequency band and the antenna is nothing but copper wire of 20 cm long and 24 gauge. In this circuit, the length of the antenna should be significant and here you can use the 25-27 inches long copper wire of the antenna or you can also increase its length with inductor coil for adjustment. Application of Fm Transmitter The FM transmitters are used in the homes like sound systems in halls to fill the sound with the audio source. These are also used in cars and fitness centers. The correctional facilities have used in the FM transmitters to reduce the prison noise in common areas. You can also use this circuit as security. Advantages of the FM Transmitters The FM transmitters are easy to use and the price is very low with clear sound. The efficiency of the transmitter is very high. It has a large operating range. This transmitter will reject the noise signal from an amplitude variation so it has a very clear sound. Disadvantages of the FM Transmitter In the FM transmitter, the huge wider channel requires. The FM transmitter and receiver will tend to be more complex. Due to some interference, there is poor quality in the received signals In this article, we have discussed the FM transmitter circuit working and its applications. I hope by reading this article you have gained some basic knowledge about the working of the FM transmitter. if you have any questions about any circuit of electronics you can comment at any time. bugFMFM bugFM TransmitterSimple Fm transmittersingle transistor fm transmitterTransmitter Be the first to comment Leave a Reply Cancel replyYour email address will not be published.CommentName * Email * Website Save my name, email, and website in this browser for the next time I comment.

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