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Author Topic: How to build infrared detector...  (Read 1740 times)
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chithanh04dt2
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« on: October 15, 2008, 05:22:06 17:22 »

Can you help me?   
I want to use infrared LED as an electrical circuit can feel the presence of man in space 40 cm. Sorry because I do not speak English very well
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Sorry for my English.
Regard !
ABBOSE
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« Reply #1 on: October 16, 2008, 04:01:16 16:01 »

You can use PIR (passive infrared) sensor for this purpose.
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ajak
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« Reply #2 on: October 16, 2008, 06:09:53 18:09 »


Sure, i can help you..

this is the answer to your question..
http://www.seattlerobotics.org/encoder/200112/richk.htm  Wink Cheesy Grin



ask question but also share your knowledge too.  Smiley Smiley Wink

sonsivri the best forum...
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chithanh04dt2
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« Reply #3 on: October 22, 2008, 07:35:53 07:35 »

I have tried do but about how income and very short. How about ways to increase revenue in the infrared LED?
« Last Edit: October 22, 2008, 07:37:39 07:37 by chithanh04dt2 » Logged

Sorry for my English.
Regard !
ajak
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« Reply #4 on: October 22, 2008, 10:26:35 22:26 »

if you like to know more about infrared proximity sensor, you could also read this:
this could help you and decide what you like to build.   Cheesy

http://www.ikalogic.com/ir_prox_sensors.php
http://www.ikalogic.com/ir_prox_sensors_40khz.php 

sonsivri the best forum.........................  Wink
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TomJackson69
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« Reply #5 on: October 23, 2008, 05:53:14 05:53 »

Can you help me?   
I want to use infrared LED as an electrical circuit can feel the presence of man in space 40 cm. Sorry because I do not speak English very well

Hi Thanh,

Why don't you use photo sensor? it could be easier than use IR; since the distance you required is very close (only 40 Cm). Put the photo sensor (or RTS) in an enclosure and drill a hole for sensing. The size of the hole and the amplifier will allow you to adjust the sensitivity of the detector.

Search on the web for it. I am sure there are plenty of the circuits.

Go here: http://www.electrokits.com/photo/sensor

Go here for "Visible Light Photo-Detector Circuits - Basic Phototransistor Detector":
http://home.cogeco.ca/~rpaisley4/PhotoDetectors.html

Good luck,

Tom
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Con Rong Chau Tien
Jehan
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« Reply #6 on: December 25, 2008, 06:44:28 06:44 »

one of my friend had made a security prip using a Laser pointer and a LDR, try if this can work for you, the laser pointer can give a very straight beam and the distance can be increased
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oscareev
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« Reply #7 on: July 14, 2009, 07:17:57 07:17 »

In this site information spanish infrared

http://www.futureworkss.com/tecnologicos/electronica/cursocad/barrerainfrarrojos.htm

regards

cali - colombia
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abcsantosh
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« Reply #8 on: July 14, 2009, 08:38:27 08:38 »

Hi, see below links for Infrared Motion Detectors. The site has good explanation and applications too.

http://www.glolab.com/

http://www.glolab.com/pirparts/pirparts.html

http://www.glolab.com/pirparts/infrared.html

Have a Good Day
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