Hello, I've had an annoying problem with my optical USB mouse ever since I got it years ago. When you connect the mouse to the front USB port and a pair of headsets to the front audio jack of the PC, you can hear a buzzing noise in the headsets. This noise is consistent to the behavior of the mouse's led. The noise's pitch lowers as you take the mouse away from the table, and increases as you lower it back to the pad. The noise also goes up an octave when you move the mouse. I know it's this mouse since it has happened with different computers, and it's not my computer since a similar mouse in the same configuration does not make this noise. I would really like to keep this mouse since it is very smooth and works like a dream. IIRC, this noise is coming from the mouse switching the led on and off at a high rate of speed. I've been fiddling around with the mouse's internals, and I found out when you bridge power and ground with a capacitor, the noise gets a lot quieter. but, the first time you hook up the capacitor to the mouse, it knocks out the mouse, and the mouse appears to reset. I think this is the mouse losing power to the inrush current of the capacitor. I know USB has an inrush current limit, so I came here to ask about a simple circuit I could build and place inside the mouse to get rid of the noise the mouse puts out on it's power lines. It needs to have an inrush current under the limits of the USB standard (whatever that is), and keep the noise from getting back to the PC. Any ideas.