IR command not received to remote

Hi, I've purchased a led light lamp with a remote control (using IR for trasmission). I want to control the lamp via my Arduino, so i create a simple IR circut with a 940nm IR Led (100mA forward current) and a 2N3904 for control it. Is not the first time I'm using this circuit, I'm controlling my TV with it and all works very well!

I reversed all button of remote control of led light with irRemote library ( and an IR receiver led. The library told me the remote control using NEC protocol, and it's confirmed from the reading of raw IR code.

After that I've tried to send code to led light with sendNEC() function, but nothing happened. I also tried with raw code (registered from light remote control) as AdaFruit example for Nikon remote control (, but nothing happened. Only for troubleshooting: I checked with a digital camera that the IR Led emit the pulse and also i checked that the code is real of 32 bits as irRemote library said

What's wrong? I need to try different 850nm IR LED or a IR Led with a forward current of 1A (peak)?

Are you using the correct carrier frequency?

Hi, into irRemote library i tried setting from 36 to 40KHz, but nothing changed =( But whitout a oscilloscope i can't measure the frequency with my IR sensor led.

This is the sample "ON" command from original remote control:

Decoded NEC: Value:FFF807 (32 bits) Raw samples(68): Gap:30758 Head: m9000 s4550 0:m550 s550 1:m550 s600 2:m550 s550 3:m550 s550 4:m550 s600 5:m550 s550 6:m550 s600 7:m500 s600 8:m550 s1700 9:m550 s1700 10:m500 s1750 11:m550 s1650 12:m600 s1650 13:m550 s1700 14:m550 s1700 15:m550 s1700

16:m550 s1700 17:m550 s1650 18:m600 s1650 19:m550 s1700 20:m550 s1700 21:m550 s550 22:m550 s600 23:m550 s550 24:m550 s600 25:m550 s550 26:m550 s550 27:m600 s550 28:m550 s550 29:m550 s1700 30:m550 s1700 31:m550 s1700

32:m550 Mark min:500 max:600 Space min:550 max:1750