This speaker may not offer the highest sound quality on the market, but it has a display that the best Bluetooth speakers cannot compete against. Because it uses ferrofluid that “dances” to the rhythm of the music, thus generating an effect that is super hypnotic.
What is a ferrofluid
Before seeing this striking speaker in more detail, it is important to know roughly what all this ferrofluid is . Because that way it is better understood how to achieve the striking and hypnotic effect that you will later see in the video with the final result of this project.
Ferrofluids are compounds that do not exist in nature, so they are synthesized by man to become a reality. NASA developed it in 1960 and it was used as spacecraft fuel and sealing material.
They are normally composed of mangnetite, hematite or some other compound with Fe2 + or Fe3 + content that are nothing other than microscopic ferromagnetic particles. These alone would not attract much more attention than a lava lamp, but when they come into contact with a magnetic field that is when things change.
This is how these striking forms are generated as the one you can see in the image and that with a simple search on the internet you will find many more. Depending on the power and changes in the magnetic field, amount of ferrofluid, etc., some frankly striking reactions can be obtained.
Building a speaker with ferrofluid
Now that you know what all this ferrofluid is, albeit quickly and easily, the next thing is to talk about this Bluetooth speaker that a user decided that it would be interesting to build with this liquid as a display.
The first challenge was to find a way for the ferrofluid not to stick to the glass , a material to which it adheres very easily. To achieve this, he had to carry out a series of special treatments to the container where it was going to be placed. Once this was done, it was time to design the shape of the speaker.
By wanting said ferrofluid to function as a visualizer of the music being played, reacting with movements as frequencies vary, the design should allow it to be easily visualized and favor the inclusion of an electro image that, through a special module, was capable of separating ranges. of sound frequencies to cause these changes in the ferrofluid.
So in the end there was what you can see in the photos taken during the entire creation process: a speaker that projects the sound upwards in order to have the ferrofluid display on the front.
With the housing created from a 3D printer , the ferrofluid in its glass container placed, with LED lighting to promote vision and all the electronics, speakers and other necessary components connected, the result is what you can see in the next video.
