Digital Infrared motion sensor

Introduction
This is a simple to use motion sensor. Power it up and wait 1-2 seconds for the sensor to get a snapshot of the still room. If anything moves after that period, the 'alarm' pin will go low.
Specification

• Type: Digital
• Supply Voltage:3～5V
• Current:50μA
• Working temperature:0℃～＋70℃
• Output level(HIGH):4V
• Output level(LOW):0.4V
• Detect angle:110 Degree
• Detect distance:7 meters
• Size:28mm×36mm
• Weight:25g

Sample


InterruptPort  PIR = new InterruptPort((Cpu.Pin)FEZ_Pin.Interrupt.Di13, false, Port.REsistorMode.PullDown, Port.InterruptMode.InterruptEdgeHigh);
PIR.OnInterrupt += new NativeEventHandler(doSomething);


static void doSomething(uint port, uint state, DateTime time) {
    //do something, turn on led, write file, ecc
}