[Audio meter with 1 watt Luxeons]

AG,
I notice you show a 7.8V supply.  I neglected to mention that I have a 5V supply I found on Ebay, will that work?  How does that change the resistor values?
Thanks
CK

[Audio meter with 1 watt Luxeons]

Thank you very much, I will give it a shot.

[Audio meter with 1 watt Luxeons]

Hi Everybody,
I am a newbie here.  I am looking to make a "giant" VU meter.  I took a piece of PVC pipe 3" in diameter and 5 feet tall.  I cross-drilled 2" PVC and mounted a 1 watt Luxeon star in the bottom of each tube.  Audioguru's sound level meter is exactly what I want, with the microphone input so I don't have to plug it into my stereo.  It does not have to be accurate, I just want it to "dance" to the beat.  I have attached a picture with the LEDs just hooked to a power supply.

What I need now is to adapt Audioguru's circuit to power the large LEDs.  They run on 3.84 volts at 350mA.  Since the LM3915 has regulated current output for LEDs, I assume I can hook a transistor (PNP I think?) up in place of the LEDs, which will switch the big LEDs on and off.  Can someone give me advice on this?  Be very specific, I am an electronics novice.

Thanks
CK1