Difference Between IR Receiver and IR Led

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Vrao Member Join Date: Jul 2015 Posts: 5	Difference Between IR Receiver and IR Led 07/21/2015 4:12 AM
	How can i tell the difference between an IR receiver and an IR led. I have two Diodes one, is a black one and one is white. I have a friend who says that the black one is always an IR receiver and the white one is always an LED. I wanted to get a confirmation or more information on this as I can't find any info on the net. Thank you Varun Rao
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Randall Guru Join Date: Aug 2005 Location: Hemel Hempstead, UK Posts: 5826 Good Answers: 322	#1 Re: Difference between IR Receiver and IR led 07/21/2015 5:32 AM
	Normally the transmitter will be clear; the receiver will be dark, blackish or red. Do a search on Digikey for infrared transmitter and receiver diodes: you can hover over the image at the left to get a larger picture. __________________ If you spend all your time looking for people and things to complain about: trust me, you will find plenty to complain about.
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Rixter Guru Join Date: Apr 2010 Location: About 4000 miles from the center of the earth (+/-100 mi) Posts: 9910 Good Answers: 1141	#2 Re: Difference between IR Receiver and IR led 07/21/2015 5:57 AM
	Interestingly, a LED will also act as a receiver... http://makezine.com/projects/make-36-boards/how-to-use-leds-to-detect-light/
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Usbport Guru Join Date: Apr 2010 Location: Trantor Posts: 5363 Good Answers: 647	#3 Re: Difference between IR Receiver and IR led 07/21/2015 7:39 AM
	The IR receiver usually has a dark, typically flat, lens on the front to block out sunlight and pass only the specific IR wavelength it is designed to respond to. The IR emitter typically has a clear dome lens on it to help focus the IR light into a beam. It doesn't usually need a dark lens since it is emitting, not receiving energy. Depending on the wavelength of the IR diode (like < 900 nm), it might emit a small amount of red energy you can see in a dark room. __________________ Whiskey, women -- and astrophysics. Because sometimes a problem can't be solved with just whiskey and women.
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spades Guru Join Date: Aug 2014 Location: Port Macquarie N.S.W. Australia Posts: 1071 Good Answers: 225	#4 Re: Difference Between IR Receiver and IR led 07/21/2015 7:51 AM
	Just a bit of useless information which you may or may not be aware of...If you want to see if an IR transmitter is actually transmitting...Look at it through the screen of a digital camera.
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Rixter Guru Join Date: Apr 2010 Location: About 4000 miles from the center of the earth (+/-100 mi) Posts: 9910 Good Answers: 1141	#5 In reply to #4 Re: Difference Between IR Receiver and IR led 07/21/2015 10:08 AM
	Some camera filter out the IR, come don't. Test your camera with a TV remote.
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adreasler Guru Join Date: Oct 2013 Location: Illinois, 7 county region (The 'blue dot' that drags the rest of the 'red state' around during presidential elections.) Posts: 3683 Good Answers: 89	#6 In reply to #5 Re: Difference Between IR Receiver and IR led 07/22/2015 11:00 AM
	Also, some cameras have an 'evening light' mode, where they remove the IR filter, and activate a small IR LED to help brighten the shadowed objects. Cameras may vary, so when in doubt, Read The Funny Manual. ;) __________________ ( The opinions espressed in this post may not reflect the true opinions of the poster, and may not reflect commonly accepted versions of reality. ) (If you are wondering: yes, I DO hope to live to be as old as my jokes.)
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adreasler (1); Randall (1); Rixter (2); spades (1); Usbport (1)

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