This example shows how to use the tone() command to generate different pitches depending on which sensor is pressed.
Connect one terminal of your speaker to digital pin 8 through a 100 ohm resistor, and its other terminal to ground.
Power your three FSRs (or any other analog sensor) with 5V in parallel. Connect each sensor to analog pins 0-2, using a 10K resistor as a reference to groud on each input line.
The sketch below reads three analog sensors. Each corresponds to a note value in an array of notes. IF any of the sensors is above a given threshold, the corresponding note is played.
Here’s the main sketch:
Plays a pitch that changes based on a changing analog input
* 3 force-sensing resistors from +5V to analog in 0 through 5
* 3 10K resistors from analog in 0 through 5 to ground
* 8-ohm speaker on digital pin 8
created 21 Jan 2010
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.