38Khz IR carrier - best way to turn it on and off

[andywpg]

did you actually check the resulting freq, it can be done manually of course

Well, the scope has measurement functions. Again, this is NOT an expensive scope ($75), but it was reporting 38.46KHz and 26uS period......both right in the ballpark of what I was looking for.

would a pull down resistor (say 1k) make the trace look better

And that was the answer! See my last post for images.

Thank you!!