How can I make a filter in the audiocable between my laptop and car stereo to avoid the noise I now get.?
When I connect my laptop to my car stereo I get a lot of noise. I suspect there is some kind of loop between the laptop power supply and the amplifier. I think I can solve the problem by using a filter in the audio cable to separate the two, perhaps by means of a transformer. Does anyone have a good circuit design for this?