LED Strip Synced MUSIC


Introduction: LED Strip Synced MUSIC

About: i like to watch ghost movie alone at night. Cause its just a movie..... :p

Its very interesting and awesome to see lights dancing on music beats....

So lets first check this out...

such that not only LED's dance on music but we too... ;)

Step 1: What You Will Need

1) 5m LED strip (one or two as you wish)

2) Adapter < 240V input and 12V output> (one piece)

3) Breadboard(one piece) with some wires for connection

4) 3.5mm Y splitter jack i.e with one male and two female points (one piece)

5) One 3.5mm jack (with one wire to ground and one wire to left or right)

6) Diodes IN4007S (2 pieces)

7) 100K ohm resistor (2 pieces) , 1K ohm resistor (1 piece) , 5.1K ohm resisor(1 piece)

8) LM324N Quad opamp (1 piece)

9) TIP31C transistors or TIP41C (1 piece)

Note1: If you have taken 2 or more led strips then you need to connect parallel to the first led strip.

Note2: Take either TIP31C or TIP41C (here TIP 31C is used)

Step 2: Use of Adapter

The Adapter must be correctly rated as discussed before.

Higher output value can burn the circuit.

-ve part of 12V output will go to the ground of the circuit.

+ve part will go to the 4th pin of the LM324N and to the +ve of the 5m LED strip.

Step 3: 3.5mm Y Splitter Jack and 3.5mm Jack

The Y splitter will have one input from the circuit

and one input fromm the speaker. The 3.5mm jack of Y splitter will be placed in the mobile or laptop.

The 3.5mm jack will have open end with one wire for ground and other for left or right connected to the circuit.

It is clearly shown in the following circuit diagram.

Step 4: Circuit Diagram

This free hand circuit diagram shows everything clearly.

Keeping in mind the previous points,

follow the circuit on your breadboard and its done..... (Y)

Step 5: On Completion It Will Look and WORK Like This

Step 6: PCB View

Once completed, you can draw the same circuit on a small PCB so as to fix it permanently.

This pic is one of its view.

It will require some sort of soldering. But this is the last part.

It would be better to focus on a breadboard as a beginner.




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24 Discussions

Hi, could you please send a picture of the bottom side of the breadboard (or PCB)? Because im kinda a noob in that kind of stuff and have no idea how to connect it...

Best regards,


Can you please share the code for this project

I followed all steps correctly, but the leds do not light up at all and the quad op-amp gets very hot very quickly. And suggestions on what I have done wrong? Thanks heaps in advance!

3 replies

sorry , I have a question : This project needs code ???? I ask because I don't have pro account in this page . thanks you . If you have pro account that can " download " please send me.

same here... the ic gets hot very quikly and it does not light up... i used tip41c though

If you wanted to connect two LED stripes in series instead what would you have to change about the circuit? Since you're using an OP Amp wouldnt the resistance of the load not effect the rest of the circuit?.

Is there any way to test this with just one led instead of an entire strip? Mine hasn't come in yet but I want to make sure the circuit is working

3 replies

you can test it with multimeter, if volts are changing, your'e good

What should the voltage be? I'm getting like 150 mV and I don't think thats enough to light the LEDs

it is barely nothing, i don't remember :D


Thank you for this awesome project. I made one and worked very well.

But I only have one problem: The SYNCED MUSIC BOARD can't share the 12 V DC power supply with the Audio Board. I wonder why...? Any suggestion on what I have done wrong?

Thanks you in advance!

How much is output power of this circuit

could you please send me the correct circuit diagram.

to my mail id 11130260@ammini.edu.in

No, the 3rd pin of the IC marked with star is the audio entry.... Its written in the diagram. If its not clear then it says that, left or righ wire of the jack goes to that pin of the opamp marked with star and the ground part of the jack goes to the ground of the circuit.

Hi anuragyadavkool . please add friend me on facebook :https://www.facebook.com/duong.daonguyen.96 . I have many many questions to ask you about this project . I must complete it as soon as possible . Thanks you

can i use this with 5v led`s if i use 5v power ?