LEDs with Computer Audio

[GuyGalaxy]

Hey, I wanted to see if there was a way to make LEDs flash or fade with my computers audio (mainly music). Is this a possibility, and if so what is the best way to go about it? Thanks for the help!!!!!

[iamdarkyoshi]

It is. I have a simple transistor based circuit that does exactly this. Care for a schematic?

[GuyGalaxy]

I would love one, thank you sir

[vebbdj]

Connect a power regulator for the LEDs to the analog speaker signal

[vebbdj]

Connect a power regulator for the LEDs to the analog speaker signal

You can probably use a dimmer, so they don't go off and ob

[iamdarkyoshi]

https://www.circuitlab.com/circuit/8ajbzh/screenshot/540x405/

Mine was a similar circuit to this one, but I used a 3v battery. It really is this simple but I would use a battery as the power source because it doesnt take much and it kinda needs to be isolated from the amp.

[iamdarkyoshi]

Oh, and if you go incandescent you can just connect the light right across the speaker. I generally use a couple christmas lights in series.

[GuyGalaxy]

So it doesnt need an amp or anything? Kk, awesome

[iamdarkyoshi]

It just needs to be connected to the output from the esisting speaker amp.if you cannot do this, you could use an lm386 to drive the leds. The lm386 is a small audio amp and you would just need to make it so the amp clips but doesnt go above the leds voltage rating.