Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   

<< Back to INDEX

Infrared Sensor (IR) [Tutorial]
posted January 27 2014 3:24.34 by spic0m

Lee Zhi Xian wrote this nice tutorial about infrared sensors.

"What is infra-red (IR)? Infra-red is an electromagnetic wave who wavelength is between 0.75 microns to 1000 microns (1 micron = 1┬Ám). Since infra-red is out of visible light range, we can't really see IR with naked eye. However, there is a method to 1Csee 1D IR which will be shown later on. Some of the infra-red applications includes night vision, hyperspectral imaging, and communications. We also use IR daily in our TV remote or any device remote.
IR transmitter and receiver can be obtained at low price. Their shape is looks exactly the same as LED. To distinguish between transmitter and receiver, the transmitter always come in clear LED while receiver is black in colour. Other than that, there is also receiver that is used to pick up specific frequency IR, 38kHz. For your information, 38kHz frequency IR is commonly used in remote control.
IR transmitter will emit infra-red when powered. You can connect the IR transmitter like a LED together with a current limiting resistor. The current limiting resistor is used to prevent too much of current passing through the transmitter and burnt it. I am using 330 ohms resistor for the IR transmitter.

As mentioned before, there are ways to "see" the infra-red from the transmitter. All you need is a camera, be it from the phone camera or digital camera. Camera has sensor which can pick up infra-red, so you can use this technique to check whether your IR transmitter is working or not."

Read the whole article here.

[Link: Zx Lee]

You might also like...

The scale of the universe [Interactive Infographic]

Organic mega flow battery promises breakthrough for renewable energy [Innovation]

Motion Detector Circuit [Project]

How to Make a Corona or Electrostatic motor [Project]

The video of the day #11 - Ultra fast hands

Ever Wondered How an LCD Works? [How it works]

The Global Conveyer Belt & Climate Change [Science]

How to use PIC Microcontroller for Voice In and Out [Project]

<< Back to INDEX



  Email (shall not be published)


Notify me of new posts via email

Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


No comment yet...

Be the first to comment on this page!

 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy