Yes but I only use Photo transistors as the sensors, not diodes.
What transistors? Maybe I need to just switch out to transistors.Yes but I only use Photo transistors as the sensors, not diodes.
I haven't had an issue before. I bury the sensor in the slot and it put a light bridge over it with IR emitters. I found it worked well. I always worry about the sensors that are just interrupted by the guide flag could be too short and cause missed laps.. Have you found certain flags not tripping well (it also make pit/fuel races hard I suspect)Light related sensors are more prone to error with alignment, ambient light etc.
You could look at using the U shaped photointerrupters under the track with Arduino, I built slongshotx's timer and it worked great on SSD track, worth looking at?