It there a way to create an LED equalizer on the walls of my room?


This is what I want to be on my wall(s). I don't care what the grid looks like but I rather not have the colors be rainbow. I want black grids with cyan bars reacting with the volume of the music. I don't know what the difference between volume and frequency is but I really want to make this happen. If you have a link to something I could buy or a kit I could buy to build something like this it would be MUCH  appreciated. I have never delved this far into technology before so try to use small words or allow me to look them up on Dictionary.com


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mattross4 years ago
I have the same idea for a project like this, except I want mine to be 36" by 56". I would build a slim wooden rectangle with "cubbies" for each LED with frosted glass (because they can get really bright) and be maybe 4" by 4". I'd probably use this https://www.instructables.com/id/Arduino-vu-meter-with-amplifier/ but use wires to mount the led in each cubby. I also need to figure out how to solder a power plug to the board to provide power. I'm not interested in using batteries with this. Anyone know how I step the electricity down from 120 volts to 9? Also, I want it to have a mic (believe this is built into the amp from the link) and a microphone gain control. Any ideas?
IDK man, I actually am planning on doing the exact same thing.... I guess find maybe a 2amp 9 volt transformer on ebay.. Im not sure if 2 amps is enoguh power though
rickharris4 years ago
Ok yes you could do this.

This is a VU meter ic so it outputs just what you need.

Alternatively if you want more of a total project you local radio shack ot on line should get you this project VU meter for a little more cash.

Now these obviously done provide wall sized displays so you will have to make that.

Fortunately LEDs can be fairly bright and when shone at a reflecting surface illuminate it quite well - especially in a dim light.

You will need one project for each channel and some filtering ccts to extract the individual channels.

The illustration is just a set of narrow wooden boxes with frosted plastic on the front.

Sorry forgot the illustration
astroboy9074 years ago
Yes, this is entirely possible.

Just requires some effort

If you have a spare computer you could probably get it to send commands to an arduino/other microcontroller to control the LEDs, however, this would take some time and effort in serial communications and programming.

I have through about doing something like this before, but never got around to it (my speaker system got stolen :( )

So, first you gotta understand the difference between volume and frequency.
If you want this to be just volume, think of volume being a single line of LEDs, going up an down. Your volume would just stay constant, as that is the amount of power being put out. So you dont really need an EQ for volume- it would just stay still.

Frequency is what makes EQs possible. EQs (equalizers) take an analog or digital sound output and splice it into different frequency bands. These bands are what are displayed on an EQ. For example, take the leftmost band on your example EQ. That might show that there is sound within a range of 1hz to 2,000hz, or pretty much any range. The one to the right of that might be displaying the sound level from a 2,000-5000hz band.

Ah, hit writers block... Really don't know what to type anymore.

Actually a good example is the Arduino VU meter (search it on instructables) - its easy and cheap, but a bit small (if you have enough equipment you can scale it up pretty large). It uses an arduino (an uno costs about $30, a clone costs $20), and an LOL shield (about $25 if I can remember right)

If you want to scale it up, you can just get the arduino, some 120 LEDs of your choice color or brightness, a good power supply, and probably some transistors. Trust me, even if this sounds all jumbled to you now, it will get easier. Im sorry if this confuses you more.... Its probably partly me (I shouldnt type when exhausted... :) )

Anyways, hope this goes well,

You can look into building a VU meter or a supped up clap circuit. The clap circuit is what you use to get an LED to flash with loud sounds.

Most of the schematics you'll find will be small projects so you'll need a way to amp them up to supply more power to light up LED strip lighting.