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I'd really like to put this in a PS2, and I've seen more variations on the internet on this circuit than I can count, but I've heard a bunch of electrical experts constantly complaining about how this is a poor design and will fry the transistors and won't last long, can overheat and damage the audio input, etc... I've heard there should be a protection diode in there somewhere and some sort of resistor on the line between the audio line and the transistor base. Have you gone back to your original design at all and tweaked it? How is this mod holding up for you after a few months of use?
Glad to hear it! And thanks for taking the time to reply. My buddy gave me a PS2 slim to work on because he had lent it to a friend for a few months and when he got it back, it wasn't reading discs any more. I opened it up to find a large family of roaches had set up a home inside it. Having a nearly unlimited supply of circuit board wash at work, I took the whole thing apart and cleaned it up well. A replacement laser is on the way, and now he's talking about paying for any parts I need to really make it look nice. A translucent shell is on the way, and the sound-reactive LEDs sound like a great idea, I just got worried when I started hearing all the criticism. Only problem is I have had to tweak the design a little since the PS2 Slim only has an 8.5V power source. How many total LEDs did you use in that 360?
There's a guy I'm talking to over on a circuit building forum who insists that the "line level" we get from audio pin-outs on the mobo shouldn't have enough voltage to turn on the transistor... line level would be 150mV to 250mv RMS / .35V peak which isn't enough (it needs to be 1/10th of the full power to turn on), but headphone jacks can get up to 1.8V which is plenty, so now I'm stuck wondering why this mod works without an amplifier chip. Any idea what kind of voltage the a/v points put out?