Infrared Motion Sensor

Infrared Sensor

Author: coration

Sensors are everywhere, some examples:

• Smaller shops or barbershops, often have a beam of light crossing the room near the door, which ends up in a photo-sensor on the other side of the room. When a customer breaks that beam, the bell rings.



• Bigger markets have automated doors, the black bulb above the door sends a burst of microwave radio energy, and waits for the reflected energy to bounce back. When a person walks into that field, the amount of energy is changed,...resulting in the door to open. Therefor you can't just run in a market, the doors wont open fast enough ;). So no kidz, it doesn't have a little leprecon in it, which presses a button to open the doors!!



• Same thing with ultrasonic sound waves used by bats for example, they bounce back off a target and create an image.
  These are what we call active sensors. They send out energy, and detect changes in them .

Motion Sensor

The motion sensing system is a passive sensor. It detects infrared energy. Human beings have a skin temperature of approximately 36° Celsius or 93° Fahrenheit, this produces an infrared energy with a wavelength between 9 and 10 micrometers. When infrared energy is detected, that infrared light bumps electrons of the sensors substrate, these are amplified and result in a signal.
People who have these little sensors, may notice that the sensing light doesn't go off when you're standing still. That's because the sensor is programmed to sense rapidly changes, you don't want every change of infrared light setting off the alarm .

If you're searching for a hack in this system, ...than this is your lucky day, because you can. The sensors are sensitive in a range of 8 - 12 micrometers. So all you need to do is calculate what body temperature you got to have to produce waves of 7 micrometers or less. I'm not responsible if you got hypothermia afterwards ;) . Or maybe you could build a glass bulb around you, glass doesn't let the infrared waves through, think of a greenhouse, the light goes in , but then it's trapped inside... so beware of people passing by in the possession of glass bulbs...

Footnote: During Operation: Desert Storm. The US military used infrared vision equipped tanks to spot and fight hostile tanks at night. Result: hostile tanks getting slaughtered like a sitting duck, technology = win

About the Author:

I'm Jan Vansteenlandt, i'm 19 years old, i still attend school.

My articles will be around the technology topic, and all it's subcategories. Normally IT-related.

I hope you enjoy them :)

Article Source: http://www.articlesbase.com/electronics-articles/infrared-sensor-544013.html

Infrared Sensor Device

The Model DXT-54 Passive ILinear DXT-54 Passive Infrared Motion Detector Transmitternfrared Motion Detector Transmitter is a battery powered passive infrared motion detector with a built-in transmitter designed for use with Linear's DX format receivers. This transmitter can be used in a variety of motion detection applications. When the passive infrared sensor detects motion in its field of view, the transmitter sends a digitally coded wireless signal to its companion receiver.

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Bye Bye Standby Energy Saving Motion Sensor
Save money and energy: switch off your home as you walk out of the room with the Bye Bye Standby Energy Saving Motion Sensor. This PIR (Passive Infrared) Motion sensor can be used in conjunction with the Bye Bye Standby® Smart Sockets to give appliance co

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Motion Sensor Lights

Motion Sensor Lights - Why You Need a Detector Light Outdoors
By Amanda Taylor

Have you seen outdoor lights that only come on when they detect movement? These special fixtures are called motion sensor lights and they offer many advantages to a homeowner.

Outdoor sensor lighting is a natural intruder deterrent. This is one of the biggest reasons that people decide to install motion sensor lights. Burglars do not like to come to a home that is well lit, or one that becomes lit when they approach it. Motion detector lights are one of the best ways to provide safety and security to your family without investing in an alarm system.

Motion sensor lights are energy efficient. If typical outdoor fixtures are left on all night every night, you will notice a difference in your electric bill. With motion sensor outdoor lighting, however, there is only a small or even unnoticeable increase in your electricity bill because the light fixture is mostly off. So, not only do you get added security, you also get cost savings!

Motion detector lights can be decorative as well as functional. Many of the first fixtures were not very decorative, but now there are many different styles, sizes, and colors available that are designed to compliment different homes. For most of the fixtures, there is no way to tell if they are “regular” or sensor.

Motion sensor lights can be customized and programmed. To learn more about different settings of motion sensor outdoor lights, visit this website: http://www.home-lighting-depot.com/outdoor_sensor_lighting.html.

For all the benefits it has to offer, motion sensor lights are a good choice for your home.

Click on the link to learn more about [http://www.home-lighting-depot.com/outdoor_sensor_lighting.html]motion sensor lights. They come in a variety of sizes and shapes. They can be made to fit in just about any outdoor area and can be purchased online. Click on the link to get all the facts and info about outdoor lighting at http://www.home-lighting-depot.com

Article Source: http://EzineArticles.com/?Motion-Sensor-Lights---Why-You-Need-a-Detector-Light-Outdoors&id=671657


PIR Motion Sensor
Description: 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.Red wire is power (5 to 12V). Brown wire is GND. Black wire is open collector Alarm.This unit works great from 5 to 12V (datasheet shows 12V). You can also install a jumper wire past the 5V regulator on board to make this unit work at 3.3V. Sensor uses 1.6mA@3.3V.The alarm pin is an open collector meaning you will need a pull up resistor on the alarm pin. The open drain setup allows multiple motion sensors to be connected on a single input pin. If any of the motion sensors go off, the input pin will be pulled low.The connector is slightly odd but has a 0.1" pitch female connector making it compatible with jumper wires and 0.1" male headers.

Datasheet