Instructables

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

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.

 
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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.

Step 2: What do we need?

Here is a small and easier overview of the components we gonna need:

1x Arduino Uno

1x MSGEQ7

2x 100nF capacitor

1x 10nF capacitor

1x 33pF capacitor

1x 200kΩ(1/4W) resistor or 2x 100kΩ(1/4W) resistor

3x 5Ω(5W) resistor

3x 1kΩ(1/4W) resistor

3x BUZ11 N Channel MOSFET

1x Breadboard

1x Jumper Wires

1x Power supply (5V, 2A)

3x 1W High Power LED (red,green,blue)

If you already have the parts laying around than you can skip to step 4. Otherwise follow step 3 and order your parts

Step 3: Order your parts!

Here is a little part list with example sellers from Ebay and Amazon. I hope it helps you to get your components fast and easy:

Ebay:

Audio Jack: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Resistor kit: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

5Ω(5W) resistor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Power Supply (5V, 2A): http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

MSGEQ7: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Arduino Uno: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Capacitor Kit: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

BUZ11 N Channel MOSFET: http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1W High Power LED (green): http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1W High Power LED (red): http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

1W High Power LED (blue): http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Jumper Wires:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Breadboard:http://rover.ebay.com/rover/1/711-53200-19255-0/1?...

Amazon.de:

Audio Jack: http://amzn.to/1gt9QTS

Resistor Kit: http://amzn.to/1gt9XPf

Power Supply (5V, 2A): http://amzn.to/1lEBiPl

Arduino Uno: http://amzn.to/1iNrB3C

Capacitor Kit: http://amzn.to/PD2jZj

1W High Power LED (green): http://amzn.to/1iNsl91

1W High Power LED (red): http://amzn.to/1iNsZmJ

1W High Power LED (blue): http://amzn.to/1gtbiFI

Jumper Wires: http://amzn.to/NgYFSR

Breadboard: http://amzn.to/1gtbtB7

Amazon.com:

Audio Jack: http://amzn.to/1vAjQA1

Resistor Kit: http://amzn.to/1rTqrqr

Power Supply (5V, 2A): http://amzn.to/1ujS7oN

Arduino Uno: http://amzn.to/1pxcmKe

Capacitor Kit: http://amzn.to/1E9G9Tc

1W High Power LED (green): http://amzn.to/1xLtV1h

1W High Power LED (red): http://amzn.to/1ujSMGM

1W High Power LED (blue): http://amzn.to/1r9EJ0I

Jumper Wires: http://amzn.to/1rS1yen

Breadboard: http://amzn.to/1uHHjSR

MSGEQ7: http://amzn.to/1pMtTgy

BUZ11 N Channel MOSFET: http://amzn.to/1vEYsuC

Step 4: Create the circuit!

Picture of Create the circuit!

Now it's time to get serious. Wire up components on a breadboard is pretty simple and I bet you will get it right after trying a few times. Just follow the schematic

And don't forget to connect the ground wire of your 5V power supply with the ground (GND) of your arduino for potential equalisation. Otherwise the LEDs might do what they want but not what you want.

can i use 12v for power source ?

GreatScottLab (author)  RudiFebrian1310 days 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.

Keule made it!5 months ago

Hi,

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