Picture of How to build your own LED Color Organ || Arduino || MSGEQ7

I am showing you how to build a color organ while only using an Arduino Uno, one MSGEQ7 and five external electronic components. I am using three high power led and three MOSFET to visualize the three different frequency bands of the music. Join me for this awesome and educational build.

Step 1: Watch the video!

The video already gives you a lot of details about the build, but I will cover the most important steps again.


Better to buy a MSGEQ7 and supporting components here:

Hermse933 months ago


After three evenings of trial and error i give up.. And ask you for a solution of my problem.

checking the circuit tons (see images) of times and run the program over and over
the results didn't get better. The serial monitor of my arduino dont get
the values i expect. it's continuously around 0 22 23 25 20 21 23. It doesn't even matter of the audio input is connected or not. The only reasson for the problem that i can imagine is that my MSFEQ7 is bad. (Order these one in china via aliexpress) Does anyone had a similiar problem?

Sry for bad english ;P

arduino project 2.JPGarduino project 1.JPG
SohamB1 Hermse932 months ago

Try changing analogInput to A0.

SohamB12 months ago

There is an error in the code I think. The analogInput pin will be A0 instead of 0 most probably.


SirTrollik4 months ago

Hi, I just want to ask about conneting the audio jack. I'm not sure, where I should connect the right and left channels and the ground.

I know that it was mentioned in the video but doesn't it affect the quality of the audio or somethin like that?

harithal14 months ago

same here sir i could not find msgeq7 please can you tell me an another alternative asap

sir are you busy?

sldata harithal14 months ago

You can get it at SparkFun:


MatiasArg4 months ago

Hi sir! I want to do it but well, i dont think i could find the buzz11, do you know an equivalent to it? Thanks sir, I really appreciate this :)

I finally got it to work but the LEDs arent bright enough. When i make the volume full, the brightness of the LED goes upto 50% but they dont blink. Could you tell me how to make my LEDs brighter. I am using LUXEON REBELS which are super bright.

vibro159 months ago

I ordered the part listed here: http://amzn.to/1pMtTgy

Could anyone give me some insight as to how I would modify this project so it works with this audio analyzer?

GreatScottLab (author)  vibro158 months ago

It is the same IC which makes things pretty easy. Just connect the Pins of the Breakout Board to the Arduino pins like I described it in the schematic.


hsharma296 months ago

Any Alternatives for MSGEQ7 and BUZ11

Really Hard to Find.

i find some but don't know if they are same




Adambowker987 months ago

I want to do something like this in my car, with a few solid-color analog LED strips that adjust brightness based on the music. I will use the MSGEQ7 shield from Sparkfun on an Arduino Uno. I have two questions:

1) How would I go about powering it? The car battery outputs 12V, which is what the LED strips need, but the Arduino only needs 5v, if I understand correctly.

2) Do you have code for using the MSGEQ7 with an LED strip (like shown at the end of the video under your couch, except for a solid-color LED strip)? That's exactly what I'm going for.

Thanks in advance!

TravisH27 months ago
I was trying to build this and when I went to try it, it didn't work, this is my first project like this and I'm a little confused and I'm not sure if I set it all up right. These are pictures of what I did. Thank for any help I get!
AndyR3 TravisH27 months ago

try to connect the ground of your breadboard to the ground off your arduino, this should help ;)

And it looks like your LEDs are not connectet to +, because there is probably no connection on the breadboard between both sides.

If you have issues like this try to explain what goes wrong so we can better help you.

Sry for bad english ;D

TravisH27 months ago
Can some one tell me what I did wrong here? I'm so lost.
hangovercat made it!8 months ago

I used this project to create a colour organ christmas tree light setup. I tested with the high power LEDs as per the instructions and then swapped them out for LED strings – one each for RG and B. I also used the Spectrum Shield which obviated everything on the left half of the circuit diagram (it includes the MSGEQ7, caps and 200k resistor). The shield is also set up as strobe=4 and reset=5 so adjust the code accordingly. It seems to be running ok with a single 900ma power supply connected to the Arduino but I am not an expert and cannot guarantee this will not create issues in any specific configuration. Thanks so much for posting this. I run it off the headphone output of my entertainment system and everyone thinks I am some kind of wizard.


I've made the project, but the LEDs still glow even when the music is off. I checked my serial monitor and it shows some small values in the PWM pins when there is no input. This happens for about 1-2 minutes until the values go to zero. Could you tell me what the problem may be and how to fix it?

GreatScottLab (author)  KarunTheWarrior8 months ago

Try to add some smoothing capacitors to your power supply. Start with
470µF and 100nF between +5V and GND. If the problem still occurs then try to use a
bigger one. And if that does not help then you might want to use a bit
more expensive power supply.

RudiFebrian1311 months ago

can i use 12v for power source ?

GreatScottLab (author)  RudiFebrian1310 months ago

If you want to use 12V for your LEDs then it is okay. But the MSGEQ7 and the Arduino needs 5V. Use for example a LM7805 to get 5V from 12V.

does this tutorial apply to the led strips as well

GreatScottLab (author)  brandon_gears9 months ago

If you want to use a 12V led strip then read the comment above you. You only replace the 1W LED with resistors with your LED strip.

thanks man, still a noob

Hey man, you can use a 12V power source. Your UNO will convert that to 5V for normal use and you can use the Vin pin to get the actual 12 V out. I assume this is for an LED strip ? I had that issue and had to use the method described and a relay to get it working well. I hope this helped !

phippsy279 months ago

How would you go about this same style setup with led strips

juys110 months ago
Am I interpreting this correctly, is all the processing done on the arduino itself? Would this operate without a conection to the computer?
GreatScottLab (author)  juys110 months ago

You are correct. It does not need a connection to a PC.

GreatScottLab (author)  thapakisankisan10 months ago

That is an audio amp. That has nothing to do with this project and is not necessary.

Keule made it!1 year ago


thanks for the circuit and code. It works fine.

Maybe I will try to modify the code with a kind of colour fading. So the colour changes are hopefully a bit smoother.

Arduino Nano RGB clolour organ with MSGEQ7.jpg