HomeDIYMusic Reactive LED Strip VU Meter

Music Reactive LED Strip VU Meter




Today in this article we are going to discuss how to make music reactive LED Strip spectrum or LED VU meter. Here I will use WS2812B  addressable RGB LED you can also use WS2811 and it is also. The difference is between the IC. this type of LED needs only one data input signal for running all the  LEDs. So, let’s make it. 

Watch Video:

Here is the video from the Creative Creator. Watch the full video and you will understand Everything. He has explained everything in the video. 

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Steps for making the LED VU meter:

Step 1:

Here I have used  5 meters of 60 LEDs per meter. In the market, you will get many LED strips but I will suggest you go with branded LED strips because it will produce many Rich Colors. Here I have used WS2812B addressable RGB LEDs. These are 5 volts LED strips. Take special care about the voltage because if you use it with the wrong voltage (Mainly runs with 5V) then the LED may be damaged. 

ws2812B LED strip

Step 2:

Now you have to cut the LED strips.  My LED strip has 300 LEDs. So I want to make a square with the LED so I just divided the LEDs into two parts 20/15.  There will be 15 LEDs in a row and the columns will be 20. In total, there will be 300  LEDs used.  Now you can connect in dimensions you want to suppose you can use 10/10 or 20/20 as your wish.

Cut LED Strips in a sequence


Step 3:

Now you will need cardboard for holding all the LED strips the dimension of the cardboard is 16.5 in length and 14 in width.  one more time it goes with a personal preference what will be the cardboard dimension. At next, you will need a  jigsaw to cut the cardboard. 

Now take the LED strips and attach them with the cardboard with the given glue at the backside of the LED Strip. Try to connect all the LEDs in a sequence such that all LEDs maintain the same distance. 

Cut LED Strips in a Sequence and place it on the Cardboard


Step 4:

Here is a simple picture of how we should connect all the LEDs. Just make sure there previous LED’s Data-Out pin will go to the next LED’s Data In pin. If you connect the LEDs in a different way then the LEDs will not work. 

led connection


After connecting all the LEDs on the cardboard it will look like this. This panel has 300 LEDs in total. 



For the controller, I have gone with the SP107E Music Reactive LED Strip VU Meter Controller. This is the only controller that gives most of the great things at a very low price. It has a wide voltage range with a large LED selection. 


Working Voltage: 5V-24V
Working Current: 18mA-45mA
Working Temperature:  -20℃ to 60℃
Wireless Connectivity: Bluetooth, 20 Meters
Wireless Application: LED Chord. Available for Android & IOS
Maximum LED Support: 2048 Pixels
Different Effects: 180 Patterns and 8 kinds of color Adjustments.
Category: DIY
Dimensions/ Size:  85mm*45mm*22mm



The Circuit is feature-packed. These are some of the highlighted features. 

  • This LED controller supports up to 2048 pixels which are a lot for most of the users. 
  • The LED controlling app is available for both IOS and Android. 
  • The App connects over Bluetooth to change any type of LED patterns. There are 180+ patterns for lighting.
  • The circuit also has LED Dimming Functionality. 
  • This controller has a wide voltage range of 5V to 24V for operating the LEDs. And also it needs only 18mA to 45mA for running its circuit. I.e. barely countable. 


Controller Setup:

The controller comes with a 3.5 mm headphone jack.  This is for connecting directly with the Android device on any type of audio source.  or you can just directly use the onboard microphone for different types of audio effects. In my case, I have also used the onboard microphone for the audio effects. 

SP107E Package contents


This also comes with a barrel Jack for the 5-volt input of the circuit.  Here I have used a  male USB port for powering the circuit.  Although you can directly be connected with any type of power supply I would rather go with USB port for being portable. 

Related Categories:

Here I am using WS2812B LEDs It has 3 Pins Vcc,  Data In, GND. Vcc will be connected with the +ve Power supply and the GND will be connected with the common GND. and the Data Pin of the LED will be connected with the data Pin. (Make sure you are not connecting it with the clock pin.)

SP107E Pinout and connection


Step 5:

After connecting all the things you have to install the app ”LED Chord” from the App Store for iOS or Play Store for Android. Or you can click on the link and download the App. Ok after downloading the process is really simple.  First, you have to open the app and then allowed the Bluetooth permission. then select the Bluetooth device from the shown me devices. 

LED Chord:

App configuration


Now you were connected with the SP107E  Bluetooth LED controller.  now I have to set the LEDs for my case I am using WS2812B  LED strips.  and the combination is GRB so I have selected that.  now in the window, you can see there is no WS2812B option.  so we would select they WS2811 Which is nearest in the app. 

Now the third option is for the LED segment how much calories are present in rows and columns so for this case here you can see there are 15 segments so I write 15 in the segments and for the pixels, I have written 20 because per channel has 20 pixels. So, all in all, the total will be 300 when you select OK then it will show the 300.



Sometimes it may give you an error 1, -1 where do you select the LEDs in segments.  this is because of the lower amount of power.  so the voltage or providing to the circuit is not sufficient for running the LEDs.  In this case, you have to use a higher rated power supply for running the VU meter. 



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Step 6:

Now every setting is done.  now you can see different effects now you can choose the effects according to your needs and you can see the lighting. you can definitely try this in the Quarantine.  Very easy to make a circuit with LED strips.

ws2812B LED strip working


The Bottom Line:

All in all, this is a great DIY project for making in quarantine. If you have all the components then you should definitely this project. The best thing is that you don’t need to mess with the coding stuff. It is just like plug and play. The SP107E LED controller supports a massive number of LEDs of 2048 LEDs. which is great for making Big LED Matrix. Nowadays these LEDs are very cheap. I hope you guys like my take on Music Reactive LED Strip VU Meter Spectrum. Even you can also make a Disco Room with it. 




  1. Sirs,
    I have built a 30 segment x 30 LED matrix of WS2818B LEDs with the SP107E controller.
    All the juumps have been made with 3 cables soldered from one LED strip to the next.
    I set the app to WS2811, 30 segments by 30 LEDs.
    The problem I have is that from the first LED far left to the 900th LED, the LEDs lose their brightness. The left hand side of the display is great but gradually across the display, the LEDs get more and more dull.
    What’s wrong?
    Is the power supply unable to drive the 900 LEDs?
    Is one of the settings wrong?
    Any ideas?

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