It is known by many names — triangle, target and trihedral — and a component among advanced driver assistance system (ADAS) target kits purchased by techs across the nation. Which brings us to a ...

#define TRIGGER_PIN 2 // Arduino pin tied to trigger pin on the ultrasonic sensor. #define ECHO_PIN 3 // Arduino pin tied to echo pin on the ultrasonic sensor. #define MAX_DISTANCE 400 // Maximum ...

I slowly started building enough sensors to be able to grasp every sub-component of such flying systems. I have not learned everything yet, but the list is big enough to share and will always be ...