Main links:

SEAMS

EMS

glui

Arduino

MaxMSP

ArduinoSMS: this is one way to get access to all Arduino pins without writing much code yourself.

Note that this solution makes using of polling, i.e. you have to send a request for data in order to receive it

Direct link to the ArduinoSMS package

The ArduinoSMS project page

Alternatives/extensions to this are:

     Messenger 

     Firmata

     http://blog.soundsorange.net/category/gear-hardware/

And here's what we did in the workshop to add Servo functionality: SMS-Servo

Servo:

http://www.arduino.cc/playground/ComponentLib/Servo

SoftwareServo.zip

Sensor data sheets:

Magnetic Hall-Effect sensor

Where to purchase sensors and interfaces:

Sparkfun - the Swedish distributor is Lawicel

Infusionsystems

Eowave

Also, the main distributors for electronic components carry lots of sensors, but it can be hard to find exactly what one needs. I have orderered from RS, Farnell, Conrad, Digikey, and Mouser

For medical supplies I have ordered electrodes from Medcat

Order code for the ones I had in the workshop: DBF3D77 but others should work too.

Drawings: 

Information Flow diagram from Thursday seminar

Drawing 1: two resistors make a voltage divider and what happens in an ADC and then how do you connect a bending sensor to the Arduino

Drawing 2: a few more details regarding ADC (Analog-Digital-Conversion)

Drawing 3: short intro to binary numbers and what range of numbers you get for a given bit resolution

Drawing 4: changing the resistor to a potentiometer so one can adjust the sensitivity

Drawing 5: formula for the voltage divider

Drawing 6: more formula stuff

Drawing 7: "timing diagram" to illustrate the use of the [thresh] object

Drawing 8: how to connect two sensors

Drawing 9: pinout for the infrared distance sensor and the magnetic (Hall Effect-) sensor

Drawing 10: filtering - a simple capacitor

Drawing 11: PWM = Pulse Width Modulation

Drawing 12: Amplifying with an OP = OpAmp = Operational Amplifier

Drawing 13: Microcontroller vs. FPGA = Field Programmable Gate Array

Drawing 14: connecting an LED to a PWM output

Drawing 15: Galavanic Skin Repsonse + Pulse 

Drawing 16: Servo pinout