I have an IR LED. I want to pulse it at 38kHz so I can receive the data with my IR receiver over the serial (TSOP382). I don't want to use any more hardware than what I have and if I could do it straight on the Arduino and not use a library that would be even better!
I don't really understand how to make sure the LED flashes at 38kHz, or how to send signals.
Does anyone have any advice? Thanks!