A simple breadboard based circuit diagram ... sensor interrupts the Arduino to record the time for each event. After that, Arduino calculates the speed using the distance between the two IR sensors ...

THIS CODE IS OBSOLETE * It needs to be updated to be compatible with changes to the ESP32 standard libraries. Also, if fine granularity control is required, it needs to use long int arithmetic instead ...

(NEXSTAR) – The Doomsday Clock, a concept designed by the Bulletin of the Atomic Scientists to represent humanity’s proximity to a global catastrophe, moved slightly closer to “midnight ...

(NEXSTAR) – The Doomsday Clock, a concept designed by the Bulletin of the Atomic Scientists to represent humanity’s proximity to a global catastrophe, might be “reset” on Tuesday.