This library enables you to use Interrupt from Hardware Timers on an nRF52-based board. These nRF52 Hardware Timers, using Interrupt, still work even if other functions are blocking. Moreover, they are much more precise than other software timers using millis() or micros(). Now supports `Sparkfun Pro nRF52840 Mini`

In its simplest form the speed trap measures how long it takes for an object to pass two sensors and calculates the speed it was travelling. The speed in cm/sec is shown on the LCD display and also on an indicator dial similar to an analog speedometer used on many cars where a pointer rotates to point to the speed.