Quote Originally Posted by Kenjones1935 View Post
If there were five cars racing near each other on this gymnasium track, would their SRF05's get confused. I don't think so, but I am not sure....
They SURE would. That is what I noted on my previous post. Your sensors are hearing echoes that keep coming long after the transmission stopped. No matter which of the SRF05's did the transmission. Keep note of that.

Maybe an IR sensor would be more appropriate here. Also faster.

Ioannis