FSR
A Force Sensing Resistor (FSR) displays a decrease in resistance with an increase in the force applied to its active surface. In this project, FSR values are read in through an 'Analog In' pin. The values are then used to control the blinking rate of an LED.
Connect one pin to power (5V) and the other pin to analog pin 2 and to a 10kΩ pull-down resistor.