PROJECT: Building an internet radio boombox

PI's: Albert Ryan and Nick

PROBLEM:
   Build an internet radio boombox with

    (i) battery power
    (ii) Wireless audio stream reciever
    (iii) (a lot) cheaper than Apple iPod HiFi
    (iv) comes in 'black'

PARTS:

    Boombox (with Aux in for wireless audio, FM radio, mp3 disk player) $80
    WiFi auidio streamer: $65
     9V recharable battery (for WiFi reciever, lasts about 25 hours) : $50

    Total:  $195

    (Apple cost: 350 for HiFi, 125 for WiFi, Total $475 with no radio)

STEP 1:

  Put together a web page with direct links to your favorite radio stations:



Step 2:

     Hook up 2.4 Ghz streaming audio (Startech Mp3 Airstream, uses FSK).

Specifications
Color	Silver
Product Height	0.91 in [2.3 cm]
Product Length	3.15 in [8 cm]
Safety Standards Europe	CE
Safety Standards North America	FCC
Shipping (Package) Weight	1.59 lb [0.72 kg]
Product Weight	5.61 oz [159 g]
Product Width	3.15 in [8 cm]
Operating Frequency	2.4 GHz
Channels Supported	8
Input/Output Connector (per unit)	1 x 3.5mm headphone (female)
Power Adapter	DC 9V, 200 mA (center positive), per unit
Power Consumption (typical)	100 mA (transmitter), 130 mA (receiver)
Operating Temperature	14~140 deg. F. (-10~60 deg. C.)
Modulation (transmitter)	FSK (Modulation Index 0.5)
Channel Spacing	9 MHz
Channel Frequency	2410~2473 MHz
Frequency Stability	+/- 100 KHz
Input Impedance (transmitter)	>10K Ohm
Input Level (transmitter)	4Vp-p (max)
Receiver Sensitivty	-85 ddBm (min.)
Adjacent Channel Rejection	>45dB @ +/- 5 MHz offset chan. frequency
Image Rejection	>25dB @ the image frequency
Output Impedance	< 1 KOhm (receiver)
Output Level (receiver)	3.4Vp-p (max.)
Response	20 KHz, -2dB (max.)
Dynamic Range	45 dB (min.)
Separation	45 dB (min.)
S to N Ratio	45 dB (min.)
THD	0.6% (min.)
Range	100 ft. (30m) open air, 30 ft. (10m) between walls

Here is the transmitter:



And here is the Internet Radio Boombox:



Left TO DO;

  Build an RF remote controller to change Internet Radio Stations back on the (PC notebook) server.

Here is the Development Team, Albert Ryan and Nick: