wraggster
November 22nd, 2013, 21:47
http://hackadaycom.files.wordpress.com/2013/11/radio1.jpg?w=620&h=292
The biggest Internet provider in Portugal needed a system to turn FM broadcast stations in Angola, Cabo Verde, and Mozambique into a web stream. Like every good project, the people in charge of the engineering turned to Hackaday staples (http://artica.cc/blog/2013/11/07/fm-stream-tech-report.html) – Raspberry Pis, Arduinos, and TP-Link routers, all stuffed into an awesome modular rackmount cabinet
Each module in this gigantic rackmount system includes an Arduino, a Raspberry Pi, aSilicon Labs Si4705 (http://www.silabs.com/products/audio/fmreceivers/Pages/si470405.aspx) FM receiver chip, and a TI USB audio capture chip that allows the Pi to turn the audio out from the radio receiver into an audio stream. All the Pis are connected to a 24 port Ethernet switch and to a separate master Raspi that converts data received from each module into an icecast stream.
The engineering behind each module is pretty impressive – they’re all hot swappable, have remote shutdown capability, and have voltage divider on the backplane to detect where in the rack it’s placed. It’s a very cool piece of engineering and a very cool example of using off-the-shelf hardware to do something that could be much, much harder.
http://hackaday.com/2013/11/20/raspis-and-arduinos-for-fm-broadcast-streaming/
The biggest Internet provider in Portugal needed a system to turn FM broadcast stations in Angola, Cabo Verde, and Mozambique into a web stream. Like every good project, the people in charge of the engineering turned to Hackaday staples (http://artica.cc/blog/2013/11/07/fm-stream-tech-report.html) – Raspberry Pis, Arduinos, and TP-Link routers, all stuffed into an awesome modular rackmount cabinet
Each module in this gigantic rackmount system includes an Arduino, a Raspberry Pi, aSilicon Labs Si4705 (http://www.silabs.com/products/audio/fmreceivers/Pages/si470405.aspx) FM receiver chip, and a TI USB audio capture chip that allows the Pi to turn the audio out from the radio receiver into an audio stream. All the Pis are connected to a 24 port Ethernet switch and to a separate master Raspi that converts data received from each module into an icecast stream.
The engineering behind each module is pretty impressive – they’re all hot swappable, have remote shutdown capability, and have voltage divider on the backplane to detect where in the rack it’s placed. It’s a very cool piece of engineering and a very cool example of using off-the-shelf hardware to do something that could be much, much harder.
http://hackaday.com/2013/11/20/raspis-and-arduinos-for-fm-broadcast-streaming/