Your math appears to be correct. I get 33 microseconds (.033ms) which the Arduino should be able to measure. But I suspect that the cross section of a BB pellet is too small for the IR receiver to see reliably, or perhaps at all.
Pete
Your math appears to be correct. I get 33 microseconds (.033ms) which the Arduino should be able to measure. But I suspect that the cross section of a BB pellet is too small for the IR receiver to see reliably, or perhaps at all.
Pete