ماژول فرستنده رادیویی باند FM دارای میکروفون ( فرستنده صدا )

ماژول فرستنده رادیویی باند FM دارای میکروفون ( فرستنده صدا )

این ماژول صدا در اطراف میکروفون پردازنده را به یک سیگنال رادیویی پخش شده FM تبدیل و آن را انتقال می دهد تا به دستگاه صدا و انتقال بی سیم انتقال FM برسد. فرکانس انتقال آن قابل تنظیم است. تغییر خازن قابل تنظیم می تواند فرکانس انتقال را تغییر دهد و دامنه قابل تنظیم 88-108MHZ باند فرکانس استاندارد ملی را پوشش دهد. شما می توانید از رادیو و تلفن های همراه استفاده کنید (تلفن های همراه از کابل هدست برای ساخت آنتن هایی با حساسیت ضعیف استفاده می کنند و به عنوان گیرنده توصیه نمی شوند) این مورد به طور گسترده در تجهیزات صدا و انتقال ، میکروفون صوتی ، نظارت بر خواب برای سالمندان و کودکان و غیره استفاده می شود.
با استفاده از این ماژول میتوان صدا را به مسافت دور ارسال کرد. ولتاژ کاری این ماژول 9 ولت و دارای آنتن با طول 70 سانتی متر می باشد.
اندازه این ماژول کوچک و به راحتی قابل حمل می باشد.
پایه های + و - و ANT به ترتیب ب معنی کاتد ، آند و ترمینال آنتن هستند.

Description:
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The term and technology are used in both telecommunications and signal processing. In analog frequency modulation, such as FM radio broadcasting of an audio signal representing voice or music, the instantaneous frequency deviation, the difference between the frequency of the carrier and its center frequency, is proportional to the modulating signal. Digital data can be encoded and transmitted via FM by shifting the carrier's frequency among a predefined set of frequencies representing digits – for example, one frequency can represent a binary 1 and a second can represent binary 0.
Frequency modulation is widely used for FM radio broadcasting. It is also used in telemetry, radar, seismic prospecting, and monitoring newborns for seizures via EEG,[3] two-way radio systems, sound synthesis, magnetic tape-recording systems, and some video-transmission systems. In radio transmission, an advantage of frequency modulation is that it has a larger signal-to-noise ratio and therefore rejects radio frequency interference better than an equal power amplitude modulation (AM) signal. For this reason, most music is broadcast over FM radio.
This module converts the sound around the onboard microphone into an FM broadcast radio signal and transmits it to achieve sound pickup and wireless transmission FM transmission. Its transmission frequency is adjustable. The green components on the core board are adjustable capacitors. Changing the adjustable capacitor can change Transmit frequency, the adjustable range covers 88-108MHZ national standard frequency band. You can use radios and mobile phones (mobile phones use a headset cable to make antennas with poor sensitivity and are not recommended as receivers) as receivers! This widely used in voice pickup and transmission, audio MIC, sleep monitoring for the elderly and children, etc. where voice pickup is required.
This transmitter is small and compact, only one dollar coin size, easy to carry, and conceal.

Note:
This module is very sensitive to picking up sounds. It is not suitable for working at particularly high volume, and it is not suitable to talk directly to the microphone near the mouth. If you really need to speak to the mouth, please keep your mouth and the microphone at a distance of about one meter! Therefore, the microphone cannot be directly pointed at the mobile phone speaker or the TV or the stereo.

Features:
Operating Voltage: 0.7V to 9V
wideFrequency adjustment range: wider than 88~108MHZ
Transmission Distance: 9V work when using the 70 cm antenna conductors do, open the local launch distance 50-100 meters, the actual look at the environment.

Relationship Operating Voltage (V) and supply current (mA) and transmit power (dBm) is as follows:
9 v, 24 mA , 10.2 dBm (i.e., 11 milliwatts)
8 v, 21 mA , 9.5 dBm
7 v, 19 mA , 8.5 dBm
6 v, 17 mA , 7.1 dBm
5 v, 14 mA , 6.1 dBm (about 5 milliwatts)
4 v, 12 mA , 4.5 dBm
3 v, 9 mA , 2.2 dBm
2 v, 6 mA , -1 DBM (about one milliwatt)
1.5 V, 4.2 mA , -4 DBM (about 0.5 milliwatts, launch with enough general family environment, green environmental radiation small!)
1 v, 2.4 mA , -9 DBM
0.7 V, 0.9 mA , and -20 DBM (i.e., 0.01 milliwatts)

Wiring Method:
The back of the core board is marked with +,-, and ANT, respectively representing the positive, negative, and antenna ends of the power supply. The antenna is generally welded with a 0.7-meter long-short wire, which is very easy!