Ferrocell, Magnetic Fields Viewer

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Introduction: Ferrocell, Magnetic Fields Viewer

Explore Science Contest 2017

Runner Up in the
Explore Science Contest 2017

Difficulty of realization 7/10

Step 1: How to Work

This is the best magnetic field viewer I've ever seen. The field lines are displayed with clarity like no other device or trick you can do.

Apply light and magnetism to either surface. Polarization of the applied magnetic field will determine the "angle of incidence" light experiences as it exits the cell.
Using a permanent magnet is the easiest way to apply a polar field and see how a Ferrocell will change the path of light and appear as a holographic image to the viewer.
One component of the viewed image represents the Null Zone of the field in 3-D. This is the lowest potential or Zero Point. Each point of light will follow a path in relation to its relative position in space around the magnetic field. Another component we see is the Neel or more generally, the Bloch Wall. This appears as a perpendicular band through the center of the magnetic field.

Step 2: How It Make

To build a Ferrocell you need to:

2 glass plates or acrylic perspex sheets
Ferrofluid
Mineral oil
A LED strip
Some neodymium magnets

Dilute ferrofluid with mineral oil in a ratio 1/4 ferrofluid and 3/4 Mineral Oil

Distribute the preparation onto a glass plate and place the second plate over the first so that the oil spills over the entire surface. Eliminate any air bubbles by pressing on the glass to get the bubbles off the edge. The preparation with the ferrofluid is so dirty takes the appropriate precautions to avoid spoiling the things around you

Seal the edges of the plate. I used the simple transparent tape.

Put the plate over a strip of LED as seen in the video, approaching a powerful magnet you will see distinctly the lines of its magnetic field.


If you like this experiment visit and subscribe to my youtube channel "Magnetic Games" http://bit.ly/MagneticGames

This amazing invention was made by Timm Vanderelli

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    39 Comments

    I've made couple of these if Perspex sheets. Bought 4xA4 off of Amzon. It does work, but not very well. I get very little magnetic lines and only when close to the sheet itself. Tried neodymium magnets and regular ones. Using rgb led strip.
    Today I disassembled few photo frames (to try with glass) and although I'm still not getting the results like in your video,it was a big improvement! I'd suggest to anyone to build this with glass, unless you have spare Perspex lying around.
    Nonetheless this is one awesome and excellent instructable! Iv'e been wondering for some time how to see them lines without buying any overpriced ferrocells.
    Thank you, Sir, for sharing this!

    Could inkjet be used as ferofluid?

    I also have some quantity of Balistol oil (used for gun cleaning) could it be used instead of mineral oil?

    would like to hear from someone who has actually made this,found it almost impossible to contain the fluid with tape at the sides, nothing but leaks and a mess

    This is one of the coolest things I have ever seen on instructables for how simple it is. Nice Job!!!

    Wow!...this is very 'Attractive'. Your version is 'poles apart' from the tiny viewing sheets you can buy.

    I have 'pulled together' all the parts needed and will be putting one together soon (but I have a lot on my 'plate' at the moment).

    Then I can test it in the 'field' and hope that my results don't 'go South'.