FM Transmitter is a device which generates frequency modulated signal. It is one element of a radio system which, with the aid of an antenna, propagates an electromagnetic signal. Standard FM broadcasts are based in the 88 MHz range. These types of networks have applications in dynamic spectrum access, co-existence of different wireless networks, interference management, etc. The main objective of this project is to transmit the information from one person to another person in remote location. Normally bugger is used for finding out the status of the person like where is he is going, what he is talking etc.
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The project circuit design is a FM Bugger circuit. It works like a the same frequency to be able to transmit and receive information in the same channel. Though it is designed that way, it is pretty much useful as a transmitter or transmitter that transmits and projects information signals into the air wherein a FM radio will act as a receiver which would receive the transmitted signal. The circuit and the FM radio must be tuned-in with as a walkie-talkie to relay messages in a distance.
The FM bugger circuit is designed to be used as a spy gadget that would monitor a person through his conversations. Though it is illegal to be used in that way, there are actually spy agencies that would use bugger devices in spying someone. It is originally a spying device but it could also be used as a transmitter to transmit messages in a distance and receive the messages through a normal FM radio. The operation of the FM bugger circuit is the same as of a transmitter.
The audio or the information signal is the analog input of the circuit which will be picked-up by the mic. The input will be filtered by C1 which is used to remove the noise and distortions in the signal. The C6 and L1 serves as the tank circuit that will produce the carrier frequency for the input signal in which it will be modulated with a transistor. The modulated signal is then transmitted into the air through an antenna in sending it to a receiver with the same tuned-in frequency.
Both the transmitter and the receiver must be tuned-in with the same frequency to be able to transmit and receive information signals at the same channel. It can be done by adjusting the trimmer capacitor of the circuit to tune-in with the frequency channel of the FM radio or by adjusting the FM radio to tune-in with the frequency of the FM bugger circuit.
When both are tuned-in with the same frequency channel, the FM bugger circuit is set to transmit messages and conversations from the line to another line which is the receiver. Testing and Design Procedure. The simulation of the FM bugger circuit in PartSim shows that the circuit is working.
The microphone was assumed to have an input of a 20 kHz sinusoidal wave. Then, the output signal at the load, R4 assumed to be the antenna for the circuit, turns out to produce a FM signal. Therefore, the FM bugger circuit itself has a great possibility to succeed and operate in real life when it will be put into test. Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson.
Introduction: FM Bugger Circuit. More by the author:. About: Hello All. Whether it may be any branch but it studies and gets off a solution for the world. We all being scientist made many instructables , Let us go forward and Author : Charlene Tessa Descallar and S. Sai Jayanth. Editor : S. Operation The operation of the FM bugger circuit is the same as of a transmitter.
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FM Bugger Circuit
We know that bugger is a device which gives the information of one person to other person in the remote location. Normally bugger is used for finding out the status of the person like where he is going, what he is talking etc. This is illegal but most of spy agencies use this bugger. Here is small circuit with which you can listen to another people conversation from long distance using the normal FM radio set. This FM bugger circuit is kept in room where you want listen the conversation. You can listen to this conversation using the normal FM radio set. From the block diagram we can easily understand that the message signal or conversation signal is modulated with the carrier frequency which is generated by the tank circuit.
FM bugger circuit
FM Bugger Circuit With Latest Technology