Wireless Fm Microphone Circuit Electricalequipmentcircuit - let s try to understand how to build a wireless fm microphone circuit the mic section actually consists of a mini fm transmitter which is so small that literally it can be ac modated in a space of less a square inch and if its made using smd it could well be made within an area of 1 square cm below is the circuit diagram and pcb layout of fm wireless microphone the range of frequencies for the fm broadcast band is 90mhz mhz megahertz or 90 million cycles per second because the fm microphone has a variable tuned circuit it can be tuned to a quiet spot on your local fm broadcast band for the best reception fm wireless transmitter circuit mini projects rf oscillator this the fm wireless transmitter circuit the truth is one kind microphone that developed to be used without a cable from the microphone this simple fm wireless microphone transmitter can transmit speech over a short range it can.

be used as a simple cordless microphone the circuit uses two integrated circuits from maxim wireless fm transmitter circuit microphone hi fi using a model ready transmitters this is because the buil up transmitter module has a transmission capability of a stable and very effective to emit 10 mw rf so that the target of hi fi fm wireless microphone transmitter circuit hi fi can be realized just as in the transmitter circuit the series of fm wireless microphone receiver hi fi also uses an fm audio receiver module module used in the circuit fm wireless microphone receiver hi fi has a good feture namely audio fm receiver module has a function that is able to muffle the noise squel the the loop antenna l1 for emission also serves as the oscillation coil the high frequency current flowing in antenna is synchronized resonance with the oscillation frequency so it is always in the best emission.

state accoring to practice launching distance is about 100 150m in empty mine in contrast in the case of equal working the fm wireless microphone transmitter operates on a single supply voltage in the range 4 5 v to 5 5 v from any standard battery source the transmitter must be housed in a metal case with shielding installed between the two stages af and rf try to keep



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