Yes or no, using just a digital output of the Arduino, could that send the code to the device being hacked?
My project thoughts: I have an old sound bar that has no buttons, just the IR remote. I'd like to have buttons, so could I output from the Arduino the codes from the IR remote (power, volume, etc..)? I've played with the IRremote sketch and I can print the IR remote codes, but before I start going down the road of thinking I can output these codes from the Arduino, I want to make sure it's even possible.
Also, I am new to Arduino and this site seems very active. I think I'm going to like it here...