Equalizer Schematic

is there a schematic or a compact way (some compact sound system without all of the cd players and radio and all of that other fancy stuff, my input is just a 3.5mm jack) of creating an equalizer like below? I just thought up a cool project, but no schematics on the internet...

Picture of Equalizer Schematic
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Kiteman9 years ago
I've seen tee shirts with that kind of display, animated, on the chest - maybe one of those could be a donor?
Padlock Kiteman9 years ago
I got one of those. It stinks. It only did like 3 levels of sound and it broke after the SECOND hand-wash.
allenchuah9 years ago
i think this could help ya

Click me !
You could try making an LED VU meter. Those things are awesome.
guyfrom7up (author)  GorillazMiko9 years ago
but this is like 10x better. Just you wait for this instructable... It's gone be awesome
westfw9 years ago
That's not an equalizer; that's just a display. (The "equalizer" part is the knobs that allow you to independently boost/reduce the level of each frequency band. Try a search for "audio spectrum display" instead. Fundamentally, it's pretty simple - a set of bandpass filters for each of the frequency ranges you're interested in, and a level display for each one using something like those lm3914s... (you can also search for "color organ", which should include the bandpass filters and a sort of one-step display...)
guyfrom7up (author)  westfw9 years ago
thanks, I'll check after school, cause I have no time right now