IR led power

Projects General Guidance
1

I am using an IR led to control my tv, and I want to use it when it's not dictated exactly at it, am using an led I took off a remote, using a similar remote I can toggle the tv from that place ,but when using the Arduino and led the led must be directly pointed at the tv receiver , also the original remote is much more forgiving at angels...

I'm using the led connect directly to a PWM pin and a pin set to low.
how can I make it better? more leds? am using 3 aaa batteries to power the arduino

also

I want to build a bigger IR project, to use from many angles and distances.. is a high power ( like 3w led ) work at this scenario? turning on and off quickly?

2

For a better angle use more LEDs. Make sure each has its own resistor and use a transistor to ensure you can get the maximum current through it.

Using a power LED will also work although you need to drive it with a constant current driver and that circuit may have speed issues.

3

Some high-power IR LEDs are designed to run at 100 mA. That is more current than an Arduino pin can supply (40 mA absolute maximum) so you need to use a transistor for switching such currents.