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amp turn on

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  • amp turn on

    This may not really be the right forum for this question but I don't really know where else to ask. Having been in car stereo for the last 11 years I have had the chance to collect a lot of stuff. Being the cheap b*****d that I am I built my own speaker system for my home computer. It is powered by an old two channel Alpine car amp that I run off of a 35A Astron power supply. The power supply comes on via a 12V spdt relay that is triggered from the 12v line out of the 300W power supply in my tower. That is fine and dandy except that I never turn the computer off so the power supply stays on keeping the amp on. What I would like to be able to do is turn the relay on and off via software control. I have seen this done using the parallel port before but that is where my knowledge of the subject ends. I would prefer not to use the parallel port as my computer serves as the print server for our family's home network and this would seem to complicate things. Is there a serial or possibly USB solution? Maybe I am just overlooking an easier solution using the sleep or suspend feature of the power supply. Please help. Jason

  • #2
    easiest and cheapest solution is to put a switch in the 12v sense line ;-)

    no sense ... no amp...
    Volvo V40 Phase 2 2002. T4 turbo upgrade.... currently no mp3 or carputer..... researching options


    • #3
      Check out and They make control systems, and I seem to recall that they had an RS-232 contact closure module.