[Andy] demonstrates building an ultrasonic anemometer using a cheap after-market parking distance sensor kit and an Arduino. Demo video after the break.

Inside the light is an Arduino Nano, which reads from the ultrasonic sensor mounted underneath the enclosure and lights up the appropriate LED depending on the car’s distance.

– Arduino 16×2 LCD screen with keypad £2.50 or $3.60 – 15m of 3 core cable – £10 or $14 – 12v Mains Power Supply £5 – $7 – Arduino IDE software loaded on to a PC or Mac – Free ...

By adopting a sensor that uses ultrasonic waves, an additional module for the 'Netatmo Weather Station ' anemometer, which can measure wind speed and direction continuously and without maintenance ...