Incredibly simple and effective as long as our machine or process is not time sensitive – perfect for a weather station temperature sensor, although wind direction is slightly more complicated.

An curved arrow pointing right. Wind belts around the equator flip about every two years, but NASA has found that a flip occurred much earlier than expected in 2015. Why is up for debate.

The bigger the difference in air pressure,the faster the wind. Winds are named by the compass direction they are coming from - north, south, east or west. Northerlies can be bitterly cold in ...