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→Force Sensing Resistor
==== Force Sensing Resistor ====
FSR:
[[Image:FSR.JPG|300px]]
http://www.tekscan.com/flexiforce/flexiforce.html
good for physical interfaces http://www.tekscanroberttwomey.com/flexiforcehitme/flexiforce.html
==== ultrasonic and IR rangefinders ====