[추천][해외] How to Build a Raspberry Pi Radio Transmitter - FM 트렌스미터

안녕하세요 버섯돌이 유재성입니다.

 

워낙 간단한 내용이고 별다른 설치도 없다보니 자세한 내용은 원문 사이트를 참고 하세요~ 

참고로, 요약하면 pifm은 wav 파일을 전송 ( http://www.omattos.com/pifm.tar.gz ) 하며,

PiFMPlay는 mp3 파일도 전송 가능 ( https://github.com/Mikael-Jakhelln/PiFMPlay ) 며 다양한 제어 기능이 존재합니다.

 

"sudo pifm sound.wav 100.0"에서 100.0은 FM 주파수 입니다.

즉, 위 처럼 실행후 FM 라디오의 주파수를 100.0에 맞추시면 라즈베리 파이에서 송신하는 사운드를 라디오에서 수신할 수 있습니다.

제 경우 음질은 꽤 깔끔한데 갖고 있는 포터블 라디오가 방송이 없는 채널을 설정을 못 해서 그런지 몰라도

93.1Mhz 방송에 송신했더니 5~10초정도 지나면 라디오에서 수신을 못하고 끊기네요^^

 

출처 : http://techzei.com/how-to-build-a-raspberry-pi-radio-transmitter/

How to Build a Raspberry Pi Radio Transmitter

Kevin John April 22, 2014

Learn how to build a FM Radio Transmitter using a Raspberry Pi. This little hack doesn’t need anything much other than the Raspberry Pi and a Jumper cable. It allows you to transmit any audio content through the Raspberry Pi. Building this Raspberry Pi Radio Transmitter wouldn’t take more than 15-20 minutes to set up and start transmitting.

Hardware Required 

• Raspberry Pi.
• SD Card.
• Jumper Cable
• Mobile Phone or FM Radio

Wiring 

Connect a jumper cable to header 7 of the Raspberry Pi, the jumper cable acts as the transmitter for Radio.

Procedure

Step 1 : Connect to your Raspberry Pi through ssh or open the Terminal in your Raspberry Pi Step 2 : Type this into the terminal

wget http://www.omattos.com/pifm.tar.gz

This will download the python script that helps with the transmission Step 3 : Untar the file you downloaded. Type this into the terminal

1	tar xvzf pifm.tar.gz

Step 5 : Open your Radio App on your phone or if you still have a functioning radio tune to 100Mhz and then in your terminal type

sudo  ./pifm sound.wav 100.0

If everything went well you should now be hearing Star Wars sound track in your radio. In the next post we will learn how to make a playlist for the Raspberry Pi Radio Transmitter. Although if you’re feeling like exploring check out the PirateRadio project which enables playback without using command line.

• SourceOliver Mattos

 

Note : The Raspberry Pi radio transmitter can be built without the jumper cable, the trade-off is that the range drops to ~10 cm from 100 meters.It is not allowed to broadcast on these frequencies in some countries. Make sure you read about your local laws before trying this hack.