Vincenzo Emanuele Castellano's blog

[HW] Getting started: Speed measurement


To measure speed we will use an Aimar ST650 connected to an Arduino.

The Aimar ST650 has a paddleweel with four asymmetrical, hydrodynamic blades and hall-effect magnetic sensor for high-level pulse output.

Connecting ST650 to an Arduino Board:

  • Bare cable to GND.
  • Red cable to +5V.
  • Green cable to pin A0.


This first  basilar sketch will count paddlewheel’s complete rotations: