question about hard drives and LED lights? Answered
I'm trying to do this --> http://www.scribd.com/doc/3216005/Make-an-analogue-hard-drive-meter for a little jukebox/media centre I'm building.
I have a basic VU meter all ready, and also a potentiometer.
I've just pulled apart an external hard drive and I'm hoping to tap into the 'activity light' on the front to drive a simple VU meter. It's a basic Western Digital external 1TB, but it has two little LEDs that flicker blue (alternately, but sometimes together! Not sure what drives each light?!) and I'm just wondering what my next step is. There's the basic hard drive, and a little SATA->USB controller board attached that features the two LEDs.
I've attached a pic, sorry it's not great. The Two LEDs are shining out from underneath the card, and you can see a little row of soldered connections on the topside of the board that run the LEDs, at the closest corner to us (the viewer).
My question is: there appear to be 4 soldered connections on the two LEDs poking up. What do I want to solder the VU meter to, and what are the risks to avoid? Any comments/thoughts are welcome. Thanks :-)