- on Hobby & Modelling
- Published in issue 11/2008 on page 62
Friction-free Angle Measurement
a magnetic shaft encoder using the Hall effect
Measuring angles has until now involved a choice between potentiometers and optical encoders. Potentiometers are inexpensive, but have the disadvantages that they require calibration and create friction; optical solutions, although offering high accuracy and long-term stability, are mechanically more complicated and considerably dearer. In this article we describe a modern semiconductor-based solution: a magnetic shaft encoder using Hall effect sensors.