Quote Originally Posted by Kenjones1935 View Post
My plan is to insert counters into the interrupt service routine. Every four interrupts (20millisec) do a PULSOUT. Every 25 interrupts, TRIGGER one SONAR or the other alternatively. My TRIGGER is built of HIGH and LOW commands totaling 10 microseconds (or so). These are not blocking.
If that plan is just for testing, it sounds like a great plan. But if you plan to use it while doing 20 mph, you will be doing a "ping" every 3.66 feet, or 8 times per second. If your reflexes are quick, you might be able to blink your eyes quickly at about 8 times per second. While your R/C car is doing 20 mph around a turn, try blinking your eyes as fast as you can, while steering your R/C car. I think your results might be similar to the ones we saw in the video.