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50x HC-SR501 Human Motion Sensor Infrared PIR Detection Module Arduino Adj, US $105.89 – Picture 0
50x HC-SR501 Human Motion Sensor Infrared PIR Detection Module Arduino Adj, US $105.89 – Picture 0

50x Hc-sr501 Human Motion Sensor Infrared Pir Detection Module Arduino Adj

US $105.89

  • Thomson, Georgia, United States
  • Jan 30th
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Fifty HC-SR501 Adjustable IR Pyroelectric Infrared PIR Human Motion Sensor Detection Modules TTL output goes high when it detects people, output is low when it is not detecting. When a person enters the protected area the sensor output is high. When a person leaves the protected area, after the adjustable delay, the sensor output goes low. Static power consumption: 65 microamps Detection range: 100° cone angle (within 23') Operating voltage DC: 4.5-20V Adjustable Delay: 5 - 300 Seconds Quiescent Current: <50uA Output High: 3.3V Output Low: 0V Detection Distance: (Maximum) 23' Inductive Lens Diameter: 0.9" Depth: 0.98" Height: 1.30" Width: 0.94" Product Weight: 0.23 oz The following Arduino Sketch is used to check the PIR modules: /* * PIR sensor tester */ int ledPin = 13; // choose the pin for the LED int inputPin = 2; // choose the input pin (for PIR sensor) int pirState = LOW; // we start, assuming no motion detected int val = 0; // variable for reading the pin status void setup() { pinMode(ledPin, OUTPUT); // declare LED as output pinMode(inputPin, INPUT); // declare sensor as input Serial.begin(9600); } void loop(){ val = digitalRead(inputPin); // read input value if (val == HIGH) { // check if the input is HIGH digitalWrite(ledPin, HIGH); // turn LED ON if (pirState == LOW) { // we have just turned on Serial.println("Motion detected!"); // We only want to print on the output change, not state pirState = HIGH; } } else { digitalWrite(ledPin, LOW); // turn LED OFF if (pirState == HIGH){ // we have just turned of Serial.println("Motion ended!"); // We only want to print on the output change, not state pirState = LOW; } } }

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