Quote Originally Posted by Kenjones1935 View Post
The SONARs each get a 10micro sec trigger. This creates an ultrasound PING. I use PULSIN plus PAUSE 10 to input the response and wait for the ringing to stop. Total time for two SONARs = at least 20msec.
hate to be picky, but is it micro or milli seconds?
Can both sonars be active at the same time?

If I could calculate closing rates accurately and if I had a finely tuned proportional control system then I might be able to implement a real PID system. Not sure. I do not know how to analyze this.
Ken
Maybe I am just lucky at times, but i have never been properly introduced to a real PID system. I don't consider myself being able to emulate a PID when I am flying R/C planes, yet I can fly them. The finely tuned proportional control system is not too hard, I am sure we can get you there.