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Wireless FM Transmitter Mic

The document describes a wireless FM transmitter microphone that allows speakers to transmit their voice without being tethered by cords. It utilizes FM technology to modulate voice signals into FM waves, which can be received by standard FM radios or cell phones. The system includes various hardware components such as inductors, capacitors, and transistors to facilitate the modulation and transmission process.

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obsakenasa2010
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8 views3 pages

Wireless FM Transmitter Mic

The document describes a wireless FM transmitter microphone that allows speakers to transmit their voice without being tethered by cords. It utilizes FM technology to modulate voice signals into FM waves, which can be received by standard FM radios or cell phones. The system includes various hardware components such as inductors, capacitors, and transistors to facilitate the modulation and transmission process.

Uploaded by

obsakenasa2010
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOC, PDF, TXT or read online on Scribd
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Wireless FM Transmitter Mic

A Mic is used to transmit voice in the form of electrical signal to large speakers so
that a large audience is able to hear to the speaker. But the Mic is limited by its
length of cord. So, for the speaker to be free of wires we can propose a wireless
Mic which operates with power backup of battery.
The wireless FM Mic Project depends upon the FM technology. What we have in
this system built is a FM modulator that modulates the input signal and then
transmit it in the FM band through the antenna of the system. This input signal is
the electrical pulse generated by Mic which acts as a transducer that converts the
voice into electrical pulse. The transmitted FM waves can be received by any
standard FM Radio receiver of cell phones having FM receiver integrated in them.
In this way we can have a wireless FM Mic with the help of this project.
The FM tuning circuit can modulate a low frequency signal with the help of a high
frequency signal. 88 MHz to 108 MHz is the range in which carrier frequency can
be chosen. The modulation circuit consists of a coil, a couple of transistor along
with their biasing circuit. With the help of this modulation circuit the human voice
which is range of 20 Hz to 20 KHz is converted into high frequency signal. This
frequency signal is transmitted through the antenna with the help of tuning
circuit. This signal when received in any standard FM receiver and amplified and
given to large speakers the voice of the addressee can reach to a large audience.
Block Diagram :

Hardware Specifications :
 Inductors
 Mic
 Capacitors
 Resistors
 Transistors
 Wires
 Battery

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