LED Spectrum Analyzer Wall - College Project

Or, for a lower cost alternative, use a 44-pin dsPIC to run an FFT algorithm and multiplex the 200 LEDs.

Bob

 

This morning I've been looking into building some sort of display such as this for my home studio. I'm interested to see where this thread goes.

I was also considering building a three-part display (left/right/sub) so I can keep an eye on all the outputs without having to fiddle around in my DAW too much I should probably start simple though...

Out of curiosity, how big are you trying to make this? When I say 'big' I mean physical size, as opposed to # of LEDs. Have you found any reference material so far that you've been looking at?

 

Hi,

If allowed for your college project the Bob way will be indeed lower cost and moreover closer to what you can find in modern product.
For the "old school way" yes 20 BP filters (maybe a LP for the first one and a HP for the last one) . Don't think that dedicated IC's are available. The LM3915 can be mapped as you want is a matter of how many db you want per led but a 30dB range looks OK

Olivier