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Thread: Windows Service that raises DTR on powerup

  1. 03-23-2004, 12:21 PM #31
    chut
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    I tested it on my machine at my desk and ended up getting -12.28 volts out of three of the wires coming out of the DB9 port. if the computer was on, without windows loaded it still had power. Not working yet....any ideas?
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  2. 03-24-2004, 02:29 AM #32
    burnout.no
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    That's weird.. I'm also using the Nehimiah board.. It puts out like 12.2v.. :/
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  3. 03-24-2004, 06:51 AM #33
    chut
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    I haven't tried it on the machine in the car yet....We'll see about that this weekend, but it's a fence building weekend, so probably not.
    Stop Buying New Music CD's.
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    Indash Motorized 7", Epia Nehimiah, 512 MB, 80 GB, DVD, Wireless G, XP Pro, XM PCR, Kenwwod 5 Channel 1200 Watt Amp.
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  4. 03-24-2004, 03:40 PM #34
    ryguy
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    So how did you build this cable? Can i take a serial cable that i might have kicking around and cut one end off...then which wire goes to the amp? Can this work for 2 amps off the same serial port? tnx
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  5. 03-24-2004, 03:50 PM #35
    Rob Withey
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    Quote Originally Posted by ryguy
    So how did you build this cable? Can i take a serial cable that i might have kicking around and cut one end off...then which wire goes to the amp?
    DTR

    Quote Originally Posted by ryguy
    Can this work for 2 amps off the same serial port? tnx
    Yes, provided you want them both to switch on at the same time. Tie the remote switch on lines together and to DTR (preferably through an NPN transistor as above - emitter-follower should work just fine).
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  6. 03-24-2004, 04:00 PM #36
    ryguy
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    Ok...i'm trying to follow you here...so i need a "DTR" cable? is that correct? tnx
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  7. 03-24-2004, 04:04 PM #37
    Rob Withey
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    Quote Originally Posted by ryguy
    Ok...i'm trying to follow you here...so i need a "DTR" cable? is that correct? tnx
    Err, nope. DTR is one of the pins on the serial port. Stands for Data Terminal Ready. Search for stuff on serial ports. It will tell you all about it, and what pin it is.
    Old Systems retired due to new car
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  8. 03-24-2004, 04:22 PM #38
    ryguy
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    perfect thanks bud

    Also I'm using my only serial port for my ir remote...would this work off a usb to serial adaptor or something like that?

    tnx
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  9. 03-24-2004, 04:53 PM #39
    unsavory
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    Quote Originally Posted by burnout.no
    That's weird.. I'm also using the Nehimiah board.. It puts out like 12.2v.. :/
    You guys ever solve this one? So are you saying the Visa M10K puts a constant 12V out through the DTR as soon as power is supplied?
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  10. 03-24-2004, 05:12 PM #40
    chut
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    nope, i tried this on my desktop at work and got the above mentioned results...I haven't tried this on my carpc yet.

    Quote Originally Posted by unsavory
    You guys ever solve this one? So are you saying the Visa M10K puts a constant 12V out through the DTR as soon as power is supplied?
    Stop Buying New Music CD's.
    Hit The RIAA where it lives.

    Indash Motorized 7", Epia Nehimiah, 512 MB, 80 GB, DVD, Wireless G, XP Pro, XM PCR, Kenwwod 5 Channel 1200 Watt Amp.
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