Difference between revisions of "Sensor-PIR"

Microduino-PIR

Microduino-PIR is a pyroelectric infrared sensor that can detect infrared rays sent from moving human body or animals. It can output switch signals and be used in various occasions that need to detect moving human body.

Features

• Adopt digital integrated pyroelectric infrared probe AM412.
• With high precision and sensitivity.
• Low power consumption, long service life and good stability.
• Large-scale operation voltage
• Digital signals
• Small size and easy to install.

Specification

• Electrical specification
  • Input voltage: 3.3-5V(6V to the maximum)
  • Working current: 15uA
  • Working temperature: -20~85℃
  • Output voltage: 5V(high level), 0V(low level)
• Tech parameters
  • Output delay time(high level): 2.3-3s
  • Sensing angle: 100°
  • Sensing distance: 7m
• Size
  • Size of the board: 20mm*10mm
  • 1.27mm-pitch 4Pin interface.
• Way of connection
  • Pin description: GND, VCC, signal and NC.

Document

• Schematic：File:Microduino Passive Infrared.Zip

Development

Equipment

• Other hardware equipment
  • One USB cable

Preparation

• Setup 1: Connect the PIR to the D6 of the Hub.

• Setup 2: Assemble the CoreUSB, Hub and the PIR together, then connect them to the computer.

Experiment: Detect If there is person moving

• Open Arduino IDE and copy the following codes into IDE.

#define  sensorPin  6

int state;

void setup()
{
  pinMode(sensorPin, INPUT);
  Serial.begin(9600);
}
void loop()
{
  state = digitalRead(sensorPin);
  if (state == 1)
    Serial.println("Somebody is in this area!");
  else
    Serial.println("No one!");
  delay(500);
}

• Select the right port in (Tools)→(Serial Port)under Arduino IDE.

• Compile and then download the program.

• After the download, you can open the serial monitor. The displayed notice reflects the status detected by the current sensor.

• Result

When the PIR is detecting the moving persons, it'll output high level in the output pin, which is 5V. And when it detected the PIR signal gone, it'll output low level(0V) after 2.3-3s delay. Therefore, we can according to that to establish a moving person detection project according to that.

Program Debugging

• "#define sensorPin 6" defines sensor interface.
• Use "" digitalRead(sensorPin); to read sensor change and to judge if there is moving human body.

Application

• Intrusion alarm
• Non-contact infrared automatic switch

Project

Purchase

History

Image

• Front

• Back