kudu
(daniel c)
June 20, 2021, 4:00am
1
Hello I’m a complete novice at electronics but seeing this ferrofluid speaker video (Ferrofluid display cell bluetooth speaker - YouTube )
really sparked my interest. I’ve always liked making things but electronics seemed a little intimidating but now I’m ready to try it out.
So far I know this build uses an Electromagnet and MSGEQ7 but I have no idea how to set these up. I’ve watched a few videos on building a DIY Bluetooth speaker but I’m confused about how to integrate the electromagnet and MSGEQ7.
Any advice would be greatly appreciated
donkjr
(Don Kleinschnitz Jr.)
June 20, 2021, 2:53pm
2
An interesting subject which I have little practical experience but it looks like a fun subject:
I am not sure exactly what you want to build but here is my guess at how these work;
A Bluetooth audio source is an input to the audio spectrum analyzer (MSGEQ7)
The MSGEQ7 samples the audio and separates it into 7 discrete bands
The MSGEQ7 provides a Peak DC output representing the amplitude for each of the seven bands extracted from the input music.
A specific bands peak value is extracted by additional logic (microcontroller) that demultiplexes the output of the MSGEQ7
The MSGEQ7 is connected to some kind of electromagnet driver that translates the peak DC value to the needed electromagnet drive current.
The electromagnet could be a speaker(s) or similar electromagnetic device(s). example electromagnet:Amazon.com: AKZYTUE
The # and pattern of the electromagnets depend on the intended display.
Found these links informative.
2 Likes
kudu
(daniel c)
June 21, 2021, 2:24am
3
Thank you! I really appreciate all the helpful information.
1 Like