# Magnetic field viewers

**URL:** https://community.simplefoc.com/t/magnetic-field-viewers/4283
**Category:** Uncategorized
**Created:** [January 3, 2024, 4:36pm UTC](https://community.simplefoc.com/t/magnetic-field-viewers/4283 "2024-01-03T16:36:21Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![Candas1](https://community.simplefoc.com/user_avatar/community.simplefoc.com/candas1/32/5296_2.png) [@Candas1](https://community.simplefoc.com/u/Candas1)
#### Post date: [January 3, 2024, 4:36pm UTC](https://community.simplefoc.com/t/magnetic-field-viewers/4283/1 "2024-01-03T16:36:21Z")

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I always wondered if I could visualize the magnetic field of the stator, that could be interesting for educational point of view.

I first thought I could create a ferrocell with ferrofluid or iron powder like [this](https://www.youtube.com/watch?v=x8zEWJzglN0), but building one seems very messy.

Then I came across this type of viewers:

 ![image](https://community.simplefoc.com/uploads/default/original/2X/a/a332df40dd55f068fda0d91f4b998724fc85ba3e.jpeg)

[![](https://img.youtube.com/vi/VVqAipbn91Q/maxresdefault.jpg "magnetic field viewer - basic") ](https://www.youtube.com/watch?v=VVqAipbn91Q)

You can see the magnetic field but as it stays imprinted in the viewer it’s not very impressive.

Now I received this type of color gradient magnetic field viewer:

 ![image](https://community.simplefoc.com/uploads/default/original/2X/3/326216d9fe7945412e4b01f5e6345269391b2ed7.jpeg)

[![](https://img.youtube.com/vi/7ENtr4-_YEU/maxresdefault.jpg "magnetic field viewer with a brushless motor stator") ](https://www.youtube.com/watch?v=7ENtr4-_YEU)

It looks better.  
Maybe it would look even better with an axial flux pcb stator.

This is how it looks like with a magnetic encoder magnet:

[![](https://img.youtube.com/vi/oEukCIBgG4Y/maxresdefault.jpg "magnetic encoder magnet") ](https://www.youtube.com/watch?v=oEukCIBgG4Y)

Not super interesting but I thought I would share the results.

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### Author: ![VIPQualityPost](https://community.simplefoc.com/user_avatar/community.simplefoc.com/vipqualitypost/32/4420_2.png) [@VIPQualityPost](https://community.simplefoc.com/u/VIPQualityPost)
#### Post date: [January 3, 2024, 6:21pm UTC](https://community.simplefoc.com/t/magnetic-field-viewers/4283/2 "2024-01-03T18:21:49Z")

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The video with slow rotation of the field around the stator is awesome!!

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### Author: ![runger](https://community.simplefoc.com/user_avatar/community.simplefoc.com/runger/32/395_2.png) [@runger](https://community.simplefoc.com/u/runger)
#### Post date: [January 3, 2024, 9:04pm UTC](https://community.simplefoc.com/t/magnetic-field-viewers/4283/3 "2024-01-03T21:04:39Z")

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Very nice!

I use these screens to check the magnets always when I get new ones… very handy.

But I’ve never seen the colour ones!! I must get me one 🙂

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### Author: ![Candas1](https://community.simplefoc.com/user_avatar/community.simplefoc.com/candas1/32/5296_2.png) [@Candas1](https://community.simplefoc.com/u/Candas1)
#### Post date: [January 5, 2024, 8:59am UTC](https://community.simplefoc.com/t/magnetic-field-viewers/4283/4 "2024-01-05T08:59:46Z")

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It seems like I commented this video 2 years ago lol

[![](https://img.youtube.com/vi/u6tafIJ6Z6c/maxresdefault.jpg "Trying to See Rotating Magnetic Fields") ](https://www.youtube.com/watch?v=u6tafIJ6Z6c)

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<div class="post-metadata">

### Author: ![Candas1](https://community.simplefoc.com/user_avatar/community.simplefoc.com/candas1/32/5296_2.png) [@Candas1](https://community.simplefoc.com/u/Candas1)
#### Post date: [February 27, 2024, 8:30am UTC](https://community.simplefoc.com/t/magnetic-field-viewers/4283/5 "2024-02-27T08:30:33Z")

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A better video from Elwin

[![](https://img.youtube.com/vi/9bo9ftxgP_g/maxresdefault.jpg "BLDC rotating magnetic field") ](https://www.youtube.com/watch?v=9bo9ftxgP_g)