infrared waves

rjenkins

Joined Nov 6, 2005
1,013
Infra red is produced by anything with heat.

Cool objects produce longer wavelengths, hotter produce progessively shorter wave infra red then visible red and through the visible spectrum as heat increases.

'Radiant heat' is simply infra red.

Note that for infra-red as used with remote controls etc., the sensors are narrow band and need just the right wavelength IR to work.
 

jpanhalt

Joined Jan 18, 2008
11,087
Last edited:

DickCappels

Joined Aug 21, 2008
10,152
A black colerd brick wall with a fire built behind to heat the bricks to a specific temperature is a very nice IR refernece.

It sounds like you had better stick with a diode.

if you can wire more about your specific application, you can get a more specific answer. These guys really in to help, and given half a chance will give you the shirt off their backs if the think it would help you.
 

retched

Joined Dec 5, 2009
5,207
These guys really in to help, and given half a chance will give you the shirt off their backs if the think it would help you.
I wouldn't want to see most of these guys without a shirt.. :eek:

@OP:

But, what they are all saying is true. If you are trying to create a tuned IR source for use in your fan and light remote controller, you are going to need to use something accurate. Close enough just wont work.

Why no IR LED? Cant get them? If not, tear apart some old remote controls.. from TVs and stereo systems. You can use them for your projects.
 

Externet

Joined Nov 29, 2005
2,202
A battery and a light bulb -or a plain flashlight- with an infrared-pass filter in front of the light source will emit infrared.
An infrared-pass filter is the dark red window/lens you see in remote receivers/transmitters.
 

retched

Joined Dec 5, 2009
5,207
I would like to know what doubt you are having? Do you doubt you can get them? Or do you want to find a "better" way?
 
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