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spectra symbol flex sensor [https://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&krypto=6pWdQhy2AZPZ2sD8W5xEl6aJV6WqDHEGqOKNa%2FdOSS9%2BxO5uYYYPAp%2FlelrGLAWKNyXGozz0WUJ%2B%0D%0APBDIeyVBNlu11KbfyDwz&ddkey=CookieLogon]
range of four meters
=== Cornucopia of Sensors ===http://www.acroname.com/robotics/parts/c_Sensors.htmlVery good for interactive artworks!What else looks interesting?
=== can we sample sound? ===
* this adjusts the frequency of the output (tone) not the magnitude.
* the light fading above (<code>analogWrite()</code>) adjusted the brightness of the light (magnitude) with PWM.
== Homework ==
[[Image:SERVO.JPG|400px]]
[[Image:SOLENOID.JPG|400px]]
== BONUS ==
