HC-SR501 PIR (Passive InfraRed) Motion Sensor Module

HC-SR501 PinOuts and Controls

Pin or Control	Function
Time Delay Adjust	Sets how long the output remains high after detecting motion.... Anywhere from 5 seconds to 5 minutes.
Sensitivity Adjust	Sets the detection range.... from 3 meters to 7 meters
Trigger Selection Jumper	Set for single or repeatable triggers.
Ground pin	Ground input
Output Pin	Low when no motion is detected.. High when motion is detected. High is 3.3V
Power Pin	5 to 20 VDC Supply input

Device Area of Detection

Time Delay Adjustment

HC-SR501 Connection to Arduino

Arduino Sketch
int ledPin = 13;  // LED on Pin 13 of Arduino
int pirPin = 7; // Input for HC-SR501
int pirValue; // Place to store read PIR Value
void setup()
{
  pinMode(ledPin, OUTPUT);
  pinMode(pirPin, INPUT);

  digitalWrite(ledPin, LOW);
}
void loop()
{
  pirValue = digitalRead(pirPin);
  digitalWrite(ledPin, pirValue);
}

Sumber
Arduino HC-SR501 Motion Sensor Tutorial

Where to buy
HC-SR501 PIR Motion Sensor Module

HC-SR501 PIR Motion Sensor Module