How To: Design Low-Cost Contactless Position Sensors

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In this video, we’ll demonstrate an inductive sensing technique used for contactless position sensing.

Conventional contactless position sensing methods, particularly Hall effect and magnetoresistive sensors, rely on magnetic fields. While these sensors are widely used, the magnets are costly, and they often need to be shielded from stray magnetic fields, which are particularly problematic in automotive and industrial applications where high currents in the wiring harness generate magnetic fields with the potential to interfere with these sensors. Inductive sensing is contactless, so it won’t wear out, it eliminates the magnet so it’s lower cost, and it’s immune to magnetic fields so it’s more robust. To demonstrate that, we have this evaluation kit for IDT’s ZMID5200 family of ICs, which includes the ZMID5201, the ZMID5202, and the ZMID5203. For more information, as well as all the latest All About Circuits projects and articles, visit the official website at allaboutcircuits.com/

Check out more video topics and articles coming from Chris at allaboutcircuits.com/author/chris-anderson

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