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Building a sound reactive lightbus/module visualizer

Hello fellow instructables.com dwellers!!

I am wanting to do a case mod with a window of frosted plexi glass and have LED lights behind it for show. I also want to be able to make them dance to music or whatever goes through my soundcard and cannot find a good instructable for this.
What I understand is that you need a sound reactive module hooked up to your lights and have seen these things for sale on ebay, but no info on how to build my own.

here are some links to videos who us this tech in lighting:
LED visualizer
external cold cathods
ON A DS!!
sunbeam lightbus
more
last one

Sryy bout all those links : )

So if anyone can help me find a DIY guide for something like any of these, or any info that will prevent me from having to buy one and have no idea how to mod it.

Thanks to everyone who replies in advance, and wish me luck.

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NachoMahma9 years ago
. It looks to me like the "ON A DS!!" was done with a "sound reactive module" and a few LEDs. This should work great for what you are trying to do. . Be aware that audio comes in two flavors - line level (1V P-P for component interconnects) and "speaker" level. You need to match the level of the sound card and the module.
The Jesus Panda (author)  NachoMahma9 years ago
yes I saw that and then went to their site and found this link

psp mod

at the bottom it shows how to hook them into two seperate speakers in a stereo. They also appear to be powered by a 5 volt source so if this is true I can plug into my speakers and power them through a usb port!!! I may have to change the value of the resistors going into the microcontroller( if that value is dependant on the speaker or the microcontroller I don't know). anyway thanks!

PS : I know little about electronics, I have no idea what line level is . . . I'll try google.
. Oh yeah. You can get 5V (and 12V) from the power connectors that go to disk/disc drives. Unless you've loaded up your computer with drives, you should have a few spares in there.
http://www.vocopro.com/glossary.html has a pretty good explanation.
> I have no idea what line level is . It's the low-level signal used between components. Usually has RCA phono plugs/jacks on a home stereo. Usually 1V peak-to-peak. No current to speak of. . As opposed to the power outputs (to speakers).