PIR Motion sensor SEN51 ,R12

This is HC-SR501 IR Pyroelectric Infrared Motion Sensor Detector Module

PIR sensors are used to detect motion from pets/humanoids from about 7m away. This one has an adjustable delay before firing (approx 2-4 seconds), adjustable sensitivity.

working voltage range :DC 4.5-20V
Quiescent Current :50uA
high output level 3.3 V / Low 0V
Trigger L trigger can not be repeated / H repeated trigger
circuit board dimensions :32 * 24 mm
maximum 110 ° angle sensor 7.
7 m maximum sensing distance

Getting started with PIR Motion sensor

In this project you’re going to create a simple circuit with an Arduino and PIR motion sensor that can detect movement. An LED will light up when movement is detected.

Parts required

Arduino UNO
LED
Jumper wires
PIR Motion Sensor

Connecting the Hardware

Tx: Adjust the duration of the HIGH output. The shortest time is about 3 seconds and the longest is about 5 minutes. Turning the potentiometer clockwise increases the time and turning it counter-clockwise decreases the time.

Sx: Adjust the sensitivity, or range, of the sensor . The sensor can detect motion in a range from as close as 2 meters up to 7 meters. Turning the Sx potentiometer clockwise decreases the range and turning it counter-clockwise increases the range.

Setting the trigger jumper

With this jumper you can select the mode of the module.

Single trigger(H):

The output pulse starts immediately after a movement is detected and remains ‘H‘ until the set time has elapsed. If during this time other motion detections occur, they have no influence.

Repeatable trigger (L):

Every new movement detected starts a new time cycle.

Connect your Motion sensor to Arduino Uno as shown bellow.

GND: GND
VCC: 5V
Out: D2 (you can choose yours)
LED: D13 (you can choose yours)

Uploading the Codes

Upload the following code into your Arduino.

//In this tutorial we have set our trigger jumper to 'H'
int sensorPin = 2; //sensor on digital pin
int LED = 13; //LED on digital pin

void setup() {
pinMode(sensorPin, INPUT);
pinMode(LED, OUTPUT);
Serial.begin(9600); //boud rate
}

void loop() {
int val = digitalRead(sensorPin);
digitalWrite(LED, val);
if(val==1)Serial.println("\tMotion Detected.");
else Serial.println("\tNo motion detected.");
delay(100);
}

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