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We love to listen to FIP, as it’s a public radio, without commercials and not so much speaking.
Unfortunately, this radio is FM brodcasted in only few city in France, and here in Grenoble, the only way to get is internet.
So we built this small kitchen radio, music playing in 14 seconds, and quite pleasantly aesthetic, in the same line as my previous nixie clock.
The large solid aluminium knob with amplifier pot ON/OFF produces a comforting click to power ON/OFF the device or adjust the volume.
The shiny stainless steel button is for future upgrade to allow changing from few radio as currently only one is available.
Here are almost all the items needed for this DIY hack:
A total of about 60€
Let’s remove the USB sound card along with the extra not needed capacitors and jack connector (desoldering station is realy a must here)
Make a slot for the micro SD card on the back: remember, the Wifi credential are stored here.
A XY table on a drill press was usefull, I didnt imagine bamboo being so hard to mill.
Piece of leather bought in Texas, this is what’s left from my buckle-less belt I made few years ago, it could be an entry someday.
With the washer nuts, it look nice.
The C8 pannel connector, wired to the wall wart.
Everything fitted in the box, held in place with double side tape (the brand Multicomp from Farnell is nice).
Adhesive rubber feet add an extra touch.
Piece of plywood for the front panel, black mate painted, with the speaker cloth.
Held in place with thin double side tape.
Let’s add a small tag to give some identity to this yet unbranded product. A nice friendly name, with our initials to personalize it even more.
Warm up kicad and start just a PCB without schematics, with a beveled edge to add a touch of design:
The result is very good, with this mirror finish!
Once glued on the product, it does raise the bar. (a pitty the manufacturing reference is on the front, next time I’ll do my artwork on the back, just to make sure it’s not on the front)
A quick video:
Download a RPI image, in this case, I choose : pipaOS A lighweight, fast, Raspbian based distro for the Raspberry PI
Once the image unziped, copy to a fresh high performance micro SD card
sudo dd bs=4M if=./pipaos-tamarillo-4.7.img of=/dev/mmcblk0
in order to boost performances, I use a Samsung EVO+ for high performance for a very fast boot
ssh sysop@192.168.1.84 (password posys)
Rpi 3 rev B and Zero W have integrated wifi
Edit WIFI credentials
The file /etc/network/interfaces should NOT be modified, as it’s overwritten at start.
Edit the file
sudo nano /boot/network.ini
To add your credential:
# # interfaces - setup your networking devices here # auto lo iface lo inet loopback allow-hotplug eth0 iface eth0 inet dhcp allow-hotplug usb0 iface usb0 inet dhcp # pipaOS Will automatically try to connect # to wireless ESSID "pipaos" passphrase "pipa123pass" allow-hotplug wlan0 iface wlan0 inet dhcp wpa-ssid YOUR_SSSID wpa-psk YOUR_WIFI_KEY
Rasberry Pi have 3.5mm stereo jack output but the quality is pure crap, wondering why they even bother populate a jack.
So lets connect a cheap UBS sound card and check what appends
dmesg
sould display something like
[ 106.865142] usb 1-1.2: new full-speed USB device number 5 using dwc_otg [ 107.006372] usb 1-1.2: New USB device found, idVendor=0d8c, idProduct=0102 [ 107.006387] usb 1-1.2: New USB device strings: Mfr=0, Product=2, SerialNumber=0 [ 107.006395] usb 1-1.2: Product: USB Sound Device [ 107.042816] input: USB Sound Device as /devices/platform/soc/3f980000.usb/usb1/1-1/1-1.2/1-1.2:1.3/0003:0D8C:0102.0002/input/input1 [ 107.105630] hid-generic 0003:0D8C:0102.0002: input,hidraw0: USB HID v1.00 Device [USB Sound Device ] on usb-3f980000.usb-1.2/input3
and
lsusb
will output:
Bus 002 Device 009: ID 0d8c:0102 C-Media Electronics, Inc. CM106 Like Sound Device Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
sudo apt-get install mplayer
mplayer `curl -w "%{url_effective}\n" -I -L -s -S http://direct.fipradio.fr/live/fip-midfi.mp3 -o /dev/null`
create non returning script:
sudo nano /home/sysop/webradio.sh
while true do mplayer http://chai5she.cdn.dvmr.fr:80/fip-midfi.mp3 sleep 1 done
#!/bin/bash #webradio daemon # chkconfig: 345 20 80 # description: mwebradioapp daemon # processname:webradio DAEMON_PATH="/" DAEMON=/home/sysop/webradio.sh DAEMONOPTS="" NAME=myapp DESC="My daemon description" PIDFILE=/var/run/$NAME.pid SCRIPTNAME=/etc/init.d/$NAME case "$1" in start) printf "%-50s" "Starting $NAME..." cd $DAEMON_PATH PID=`$DAEMON $DAEMONOPTS > /dev/null 2>&1 & echo $!` #echo "Saving PID" $PID " to " $PIDFILE if [ -z $PID ]; then printf "%s\n" "Fail" else echo $PID > $PIDFILE printf "%s\n" "Ok" fi ;; status) printf "%-50s" "Checking $NAME..." if [ -f $PIDFILE ]; then PID=`cat $PIDFILE` if [ -z "`ps axf | grep ${PID} | grep -v grep`" ]; then printf "%s\n" "Process dead but pidfile exists" else echo "Running" fi else printf "%s\n" "Service not running" fi
update-rc.d webradio defaults
sudo service webradio start
Startup time with RPI 3 B: Startup finished in 2.602s (kernel) + 4.386s (userspace) = 6.988s
Not bad at all for a full featured computer with wifi and usb audio
Source: http://www.dotmana.com/weblog/2018/03/ikea_diy_webradio/