However, I didn't really care for the Ario based control interface, which required a computer up and running to start, stop, or change the channel. I wanted to build a stand-alone controller, and found MightyOhm's Wifi Radio (http://mightyohm.com/wifiradio ), on which the Tinkernut project is based. MightyOhm's control panel looks very nice, but it seemed more involved than I was ready for. I don't have a non-Arduino AVR programmer, and I wanted to use things I had on hand and avoid opening up my router if possible. Please note that this is an intermediate project, which will require basic multimeter experimentation to determine how the rotary encoder functions, and intermediate breadboarding, since there are a lot of connections involved.
So, using an Arduino-compatible controller board (Adafruit's Boardiuno , actually), a standard Arduino Ethernet Shield , a 16x2 character LCD, and a rotary encoder knob, I was able to quickly put together a controller that could select and play from a number of preset channels, turn off the radio, and display station, artist, and title information for the currently playing station and song.
Step 1: Parts
First, you need some kind of MPD-based WiFi radio. I recommend the following projects, an OpenWRT-based WiFi radio, such as Tinkernut's ( http://tinkernut.com/archives/2387 ) or MightyOhm's (http://mightyohm.com/wifiradio , on which Tinkernut's is based), or a laptop running Music Player Daemon (mpd: http://mpd.wikia.com/wiki/Music_Player_Daemon_Wiki )
For the Controller:
* Arduino-compatible microcontroller platform (such as Arduino UNO , I used my Boarduino )
* Arduino Ethernet library compatible network controller (such as the Arduino Ethernet Shield )
* LCD Character Display (16x2 characters, or larger, such as this one from Adafruit , I got one from Ebay )
* Absolute Rotary Encoder (mine has 10 positions) (for choosing the station)
* Header pins
* Hookup wire
* 0.1" female wire connectors of varying degree (optional), which can help when putting everything in the enclosure
* ~7.5-9V wall wart power adaptor
* one cardboard box that has a lid and is big enough for the breadboard, or some other enclosure you can modify to hold the selector knob and LCD, and cut ports for the Ethernet and power.