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Picture of Music LED Light Box

My original LED light cube got allot of reactions. Some of them where about making the LED's react to music. This did sound very interesting and I found some instructables on here.
Unfortunately I found it very hard to understand those instructables. In my opinion they weren't explained well enough and even some circuits weren't correct.

That's why I though I build one and make an instructable of it. I tried to make this instructable so easy, that everyone with or without any experience can make one!

If you make one, don't forget to share your end result photos and movies with us.

Below you'll see the end result of my Music LED Light Box.

The movie is shot with my Canon Digital Camera, in the dark. My camera can't handle the fast switching between light and dark very well. In reality the effect is even nicer then on the video.



Before people go asking who's music or what songs these are in this video, these beats are made by my brother.  :)
You can visit his website www.motabeatz.com or  YouTube channel for more information and songs.

 
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Step 1: Materials & Tools

Picture of Materials & Tools
To make this Music LED Light Box you can use many different things and build it different ways.
In this instructable I'll explain how I made it, a very simple way.

Materials
- 12v Adapter (a battery can be used as well)
- 3.5 jack headphone cable.
- tip31 transistor (this is the key to the whole project) - $0.50
- 5mm LED's (the color or amount is totally up to you, 1 LED per 3v. I used 12v, so 4 LEDs) - $0.28
- A4 acrylic sheet - 3mm thick (also known as 'plexiglass') - $2.00
- Fine sandpaper (I used 400) - $1.00
- Electrical Wire

If you see a price above, that means I bought it. The rest I just ripped of some old junk. The 12v Adapter was from an old wireless headphone and the 3.5 jack plug is from another old headphone.

Tools
- Jigsaw (also a Jeweler Saw can be used. But that's really hard to get straight lines)
- Glue Gun (hot glue, other glue to glue acrylic is possible)
- Drilling tool
- Solder tool (optional)
- Pen

Ones you've got this stuff you're ready to begin!


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age138 days ago

2 VERY IMPORTANT details left out in the directions that will make or break this project. I signed up just to post this and let others no.

1. "Any wires" will not do. The thinner the better. This will be absolutely impossible to do with thick wire because of detail # 2.

2. The wires CANNOT TOUCH EACH OTHER on the tip31, NOR CAN THEY TOUCH ANY OTHER LEG on the tip31, NOT EVEN A LITTLE BIT.

For example, the negative leg on the last LED light is to connect to the middle leg of the tip31. That wire CANNOT touch the left or right legs or any other wires, not even a tiny hair's-width strand of copper can touch anything else.

If they touch another wire/leg, you'll notice it will complete the circuit and turn all the lights on and stay solid. When everything is connected correctly, the lights will stay off until the music plays. It took me days to figure this out.

I made it, I use 2 channels, four LEDs each Channels.

Here is the video

Hi man this visualizer is amazing, but regarding the headset cable which is 3.5 jack I already cut it off but i have 4 wires one of them is red, is this red wire needed?

And is there any other components required like resistors for example? (like the diagram below)

headset wire connections.jpegschematic curcuit in led visualizer.jpg

Very cool! Are you splitting left and right channels from the audio and then using two tip31 transitstors? Are you using a 24V power supply or is there a better way to fire up that many lights?

Yes I am splitting them L&R with 12V powersupply, you can try two parallel the additional LED that you want as long as your power source can support it.

asimobot13 days ago
it doesnt work with samsung phones what can i do
JesusG33k14 days ago

One improvement would be to add a speaker amplifier alongside this and have the device put out some audio as well.

<img src="http://www.deeptronic.com/wp-content/uploads/2014/02/small-amplifier-3-transistor-design.gif">

This is a simple transistor circuit that works decently. If you want quality sound order an OP-AMP and use that (make sure it's 12V compatible).

Thanks for sharing!

JesusG33k

they spark together, no frequencies at all..but great job man... i think this one is better..

Souce : youtube

https://www.youtube.com/watch?v=Yd3hzYAJzOo

JohnW3023 days ago

We made our first one of these, but are planning to make some changes. We used the super bright blue LEDs our local electronics shop carried, but they only have a 20 degree viewing angle. We sanded one of them to try to create the diffusion effect, but it just made the LED very dim. I just ordered some new LEDs from here:

http://lighthouseleds.com/5mm-diffused-flat-top-le...

and very interested to see the difference. Also, the info is here in the article, but I still didn't focus on it. We put 6 LEDs in our box like the video above, but it didn't work at all. After some confusing diddling, we finally figured out that we needed a bigger power supply. I found a 24V power supply on Amazon for about $8.

vbhatia3 made it!2 months ago
Please tell me the exact number of the transistor the shopkeeper gave me tip31co.
temp_2107560192.jpg

as long as it is TIP31. some had C and A but they work fine.

SamR81 month ago

I'm testing my circuit on a breadboard (just like your linked video). I can't get the LED to respond to the music, it lights up as soon as I plug it into anything, music or not. It stays solid and won't respond to the audio signal. Know what I'm doing wrong?

Check your connection or repeat what you did. It happened to me. I even burned 10 LEDs.

I'm so doing this, but I was wondering. Is there a way to sequence other lights to the individual parts of the tune? Like you have lights for the beats, but what if I want to add lights for the bass, and other?

I am doing something similar! Filters! Look up low, band, and high pass filter designs and split the audio signal to run through each one respectively. Now you have signal for bass notes, mid ranges, and high frequencies. I have a tentative schematic as well.

Very cool. Thank you. ^.^
stefaniboy1 month ago
Hey! Just ordered the components, so exited. I wondered of you could wire the leds up in a pararell connection and not a serial? So that you could use much more lights

I didn't design it, but yes parallel would work and you could also use a lower voltage as well

DanM161 month ago

Do you know if you can use speaker outputs from a receiver instead of the headphone jack? My receiver has A and B outputs, B for extra speakers. Would it be too much power? It is a Technics SA-DX1050. That way I wouldn't have to split the audio and I don't think I can play the speakers and headphones at the same time.

vbhatia3 made it!1 month ago
My led are not reacting to audio cable . led are blinking countinously.
temp_1137232206.jpg
lauren1522 years ago
i have done everything you did except i cut the adapter cord and attached it to the led and tip35, everything works perfectly except when i plug it in i cannot hear music coming from my computer or phone or anything. what am i doing wrong?

Please tell me the exact number of the Transistor use

Haha, it's amazing, thank you!

alex.laius.33 months ago

How do you get the cloudy look on the plexiglass? With sanding?

You can buy it already like that, or use glass frosting that you can buy at Home Depot to spray-on.

BritR2 months ago
Looks cool... Thanks :)

where can I purchase the small electrical wiring you are using in the instructions and the battery?

18V out of a 12V adapter?! Man that's not normal!

roofy995 years ago
 When I stripped my headphone cable it didn't look anything like the ones in your photo. I used an old pair of apple ipod headphones. They had 3-4 seperate strands but they weren't like wires like yours are. Am I using the wrong type of headphones, or what should i do to fix it?

Thank You
AiurI roofy994 months ago

Almost all headphones have other contacts etc. For example my headphones i stripped wire from have many little golden wires, then isolated 3 other ones, black, green and red (They are also gold after stripping)
So, i figured it out, that green is left headphone, red is right, black then has to be ground. Check inside of your separate headphones to see what cabeles come from / to them and You will probably know then, unless R and L are the same colors, but really You don't need to care about which channel is used.

same thing! have u figured it out?
melt the enamel with a small flame 'till they are gold colored then solder as normal
gabrielguy3 years ago
so 20 leds would be 60 volts!?D:
AiurI gabrielguy4 months ago

It's quite f...d up, it actually could be less than 60 volts. It depends on the type of LED diodes. I for example i could power 1 bigger LED 3v diode, so it could be bright enought with 2 3v batteries, because with only one it was dark. Also, i powered up 5 smaller 3v LED diodes using 1 3v battery and they were very bright. I am really confused about that.

in one line yes in bridge no :D
Reganne984 months ago
We built everything together just as it told us to do, but once we hook it up to the radio, or iPod, nothing happens. No music plays either. What are we doing wrong????
tamlani1 year ago

hey plz help me out. i am using 5m led flex roll with 12v adapter. plz guide me how many transmitter would i need as i am using one TIP31C but it doesn't work...

dinox4 tamlani4 months ago

i also could only find Tip31C it seems it needs higher input to work, mabye 5 watts speaker amplifier to work properly in my case...

it's transistor not transmitter. And one tip31C is all you need. However if you're 5m LED flex roll requires more than 12V to light up then you're going to see no light. Also keep in mind that the volume on your stereo must be high enough for the transistor to read a voltage coming in.

bswt11 months ago

i have a setup where i have 400leds wired in set of 4 so, 100 a group, could the tip31 switch them? or the better question would be, whats the max switching current (amps) tip31? if is more than 4-5amps than I'm fine. well i do have 3 here with me, so if it works than ill report it here.

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