https://www.sparkfun.com/products/9669
Tinkerkit Arduino
A shield with a set of easy-to-connect sensors
A high voltage AC relay is available.
HackRF
Low cost wide band software defined transceiver.
By Michael Ossmann
http://ossmann.blogspot.com/2012/06/introducing-hackrf.html
HackRF One
http://greatscottgadgets.com/hackrf/
Arduino Wi-Fi Shield
This would be a good upgrade for the Ethernet shield
https://www.sparkfun.com/products/11287
Here’s the sample code which allows the wifi shield to detect wifi networks. And an example which shows how to send the SSID and Password to connect to a protected wifi network.
http://arduino.cc/en/Guide/ArduinoWiFiShield
Internet Arduino pin control
A web server on the Ethernet shield
At bildr.blog
http://bildr.org/2011/06/arduino-ethernet-pin-control/
REST server
By Jason Gullickson
https://github.com/jjg/RESTduino
A client program: http://bildr.org/2011/06/arduino-ethernet-client/
Xively Arduino client
Arduino with touchOsc
By pakspul
2 channel Relay Shield
ar-drone – node.js library to control Parrot AR Drone 2.0
An implementation of the networking protocols used by the Parrot AR Drone 2.0
https://github.com/felixge/node-ar-drone
This would be an very interesting source of telemetry data for composition.
Web interface:
https://github.com/arun057/ardrone-web
A developer guide
http://abstract.cs.washington.edu/~shwetak/classes/ee472/notes/ARDrone_SDK_1_6_Developer_Guide.pdf
User group site:
Streaming camera demo….
http://youtu.be/mz8hTXJOgwc
Infrared beam pair
A narrow beam that might be appropriate for building an electric eye.
At Arduino Info
http://arduino-info.wikispaces.com/InfraredBeamPair
