METROLOGY
Force Sensitive Resistors
http://www.ladyada.net/learn/sensors/fsr.html
http://www.instructables.com/id/DIY-Force-Sensitive-Resistor-FSR/
Arduino LM35 Sensor
http://www.ladyada.net/learn/sensors/tmp36.html
http://pscmpf.blogspot.com/2008/12/arduino-lm35-sensor.html
http://web.cecs.pdx.edu/~gerry/class/EAS199B/howto/thermistorArduino/thermistorArduino.pdf
Relative Humidity
http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/relhum.html#c1
Humidity and Temperature Sensor
http://www.sparkfun.com/products/8257
House Online
Read the temperature and humidity data from sensor and publish it to pachube.com
http://code.google.com/p/houseonline/
Precision humidity and temperature sensor (SHT1x/7x)
http://hackaday.com/2008/12/29/parts-precision-humidity-and-temperature-sensor-sht1x7x/
Arduino Programming and Hardware Interfacing
http://web.cecs.pdx.edu/~gerry/class/EAS199B/howto/
ROBOTICS
Arduino + Neural Networks
http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1289314501/all
Control your motors with L293D and Arduino
http://www.instructables.com/id/Control-your-motors-with-L293D-and-Arduino/
Build your own Programmable Logic Controller
http://hackaday.com/2011/05/04/build-your-own-programmable-logic-controller/
Sumobots
http://www.hometownhacker.com/news/tag/robots
Sensitive Buildings: Final Projects
http://www.faludi.com/2011/12/27/sensitive-buildings-final-projects/
Building Wireless Sensor Networks
Arduino PID Library
http://arduino.cc/playground/Code/PIDLibrary
Arduino_Processing Face Follower
http://marco.guardigli.it/2010/01/arduinoprocessing-face-follower.html
$10 camera module for your next FPGA project
http://hackaday.com/2012/03/07/10-camera-module-for-your-next-fpga-project/
--
PRODUCTS
http://www.electronicaestudio.com/sparkfun_productos.htm#SP-COM10685