I have this simple IR led transmitter project that I managed to program my a/c codes into. Its basically an UNO with an IR led Tx along with transistor and resistors which I currently power from a battery bank connected to the usb port of the arduino whenever i need it.
The issue is that I have to have the IR led about 12" from the a/c at least in order for it to work. What would need to be done for it to work from a normal distance of about 5 feet, which is what the remote control works at?
PS im not posting the diagram cause i dont have one made and I dont think its necessary for the question but will gladly make one if it is indeed required.