FSR402力敏電阻器
子產品簡介
FSR 402力敏電阻器，它可以便捷地檢測外界壓力。它實質上是一個可變電阻， 和光電傳感器或彎曲傳感器的原理類似，通過在其上施加壓力的變化來改變阻值。
所需材料
- Arduino Uno 開發闆 *1
- 面包闆 *1
- FSR 402力敏電阻器 *1
- LED *1
- 10k歐和220歐電阻 *1
接線
接線示意圖
FSR402正面(有條紋的)朝上時，左邊的引腳為負極，右邊為正極
-
FSR402
+ ---->5v
- ---->10kOhm ----->GND
- ---->A0
-
LED
+ ------->220Ohm ----->D3(PWM)
- ------->GND
示例代碼
/* 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
}