Wednesday, February 9, 2011

force sensitive resistor connected to LED's

video
This was a test using a force sensitive resistor to control the resistance of light into a series of LED's. this type of resistor causes the led's to light up depending on the amount of pressure applied. good application for touch, and floor mat sensors (although a larger FSR is advised for floor pressure)


i have posted the source code below. the flex sensor used 10k resistor grounded, an output to an I/O pin on the arduino, and a connection to positive. it will specify in the code below. enjoy!


source code:


int fsrPin = 0;     // the FSR and 10K pulldown are connected to a0
int fsrReading;     // the analog reading from the FSR resistor divider

void setup(void) {
  // We'll send debugging information via the Serial monitor
  Serial.begin(9600);  
}

void loop(void) {
  fsrReading = analogRead(0);

  Serial.print("Analog reading = ");
  Serial.print(fsrReading);     // the raw analog reading

  // We'll have a few threshholds, qualitatively determined
  if (fsrReading < 10) {
    Serial.println(" - No pressure");
  } else if (fsrReading < 200) {
    Serial.println(" - Light touch");
  } else if (fsrReading < 500) {
    Serial.println(" - Light squeeze");
  } else if (fsrReading < 800) {
    Serial.println(" - Medium squeeze");
  } else {
    Serial.println(" - Big squeeze");
  }
  delay(1000);
}

No comments:

Post a Comment