Squirrels have fuzzy tails.
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This maybe a stupid question, but what's the difference between an IR emitter and IR led?
Does anyone have a good place to buy cheap IR leds from? Lets say about 100 of them. Digikey and dealextreme are two I'm thinking of using right now.
The link i posted for the emitter looked different than the IR led's though?
To be able to use an IR led effectively it needs to be modulated. That is it needs to be turned on and off at a certain frequency.Do not confuse this with the frequency of IR this is the frequency of turningthe LED on and off just like you would do with a normal light LED.The reason for this is that the receiver can then have a filter that would not accept except the frequency of the Emmitter so that it will be able to avoid normal IR that comes from lamps and sunlight etc.So with this setup the Receiver and Emmitter would have a correspondancethat would make the receiver sure that when it receives the on and offthe emmitter is giving it will respond with assurance that it is a real signal.
But strictly speeking an IR LED is also an emmitter, but I think this is differencethat some people may use to distinguis between an unmodulated IR LED and a modulated one.
IR emmiter is something that emits infrared for example - a heater is an infrared emmiter [...]