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Topic: Weak IR LEDs (Read 983 times) previous topic - next topic

SillyNewbie

Hi,

I'm new to Arduino and electronics in general, so my question might be a little noob  :smiley-red:

I'm trying to make the usual camera remote control/intervalometer using an IR LED. The code and circuit work fine but the IR signal seems to be very weak. I can't take my Arduino a few feet away from the camera and expect it to take pictures. The signal won't reach the camera unless the IR LED is at least ~40 cms close (~15 inches)

I blame the IR LED I'm using, so my question is: What should I search for on an IR LED in order to get a powerful one that can interface with Canon cameras? (940nm wavelength)

Cheers!

BetaDelta

What LED are you using at the moment?
"C++ : Where friends have access to your private members." - Gavin Russell Baker

AWOL

Did you remember to set the pinMode to OUTPUT (I have to ask, because I can't see you code)
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SillyNewbie

Quote
What LED are you using at the moment?

To be honest, I don't know  :smiley-sad-blue: I just bought a few IR LEDs from my local electronics shop (I didn't ask them for anything specific, just IR LEDs). That's why I want to know what I should be looking for. Is there any "power" value?

Quote
Did you remember to set the pinMode to OUTPUT (I have to ask, because I can't see you code)

Yes, I did. I don't have the sketch here with me (currently at the office) but it does work, in the sense that it triggers the camera.




MarkT

IR emitters are often driven with pulses of around 100mA - we need to see the circuit.
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