模块简介

FSR 402力敏电阻器，它可以便捷地检测外界压力。它实质上是一个可变电阻， 和光电传感器或弯曲传感器的原理类似，通过在其上施加压力的变化来改变阻值。

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所需材料

• Arduino Uno 开发板 *1
• 面包板 *1
• FSR 402力敏电阻器 *1
• LED *1
• 10k欧和220欧电阻 *1

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接线

FSR402正面(有条纹的)朝上时，左边的引脚为负极，右边为正极

• FSR402
  + ---->5v
  - ---->10kOhm ----->GND
  - ---->A0
• LED
  + ------->220Ohm ----->D3(PWM)
  - ------->GND

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示例代码

/* How to use a Force sensitive resistor to fade an LED with Arduino
   More info: http://www.ardumotive.com/how-to-use-a-force-sensitive-resistor-en.html 
   Dev: Michalis Vasilakis // Date: 22/9/2015 // www.ardumotive.com  */
   

//Constants:
const int ledPin = 3;     //pin 3 has PWM funtion
const int sensorPin = A0; //pin A0 to read analog input

//Variables:
int value; //save analog value


void setup(){
    
  pinMode(ledPin, OUTPUT);  //Set pin 3 as 'output' 
  Serial.begin(9600);       //Begin serial communication

}

void loop(){
  
  value = analogRead(sensorPin);       //Read and save analog value from potentiometer
  Serial.println(value);               //Print value
  value = map(value, 0, 1023, 0, 255); //Map value 0-1023 to 0-255 (PWM)
  analogWrite(ledPin, value);          //Send PWM value to led
  delay(100);                          //Small delay
  
}

 

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参考文献

http://www.instructables.com/id/How-to-use-a-Force-Sensitive-Resistor-Arduino-Tuto/?ALLSTEPS