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Thread: Laptop Auto Power-On / Turn-On Module

  1. #281
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    It's an Acer Travelmate 8104. I'm afraid to take the switch apart since the parts are so tiny I may not be able to piece it back together.

  2. #282
    Constant Bitrate Gibson99's Avatar
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    Aug 2004
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    on my dell's docking station, there is a separate power button. maybe your laptop's dock or port replicator has one too. If you can find a schematic (or even a dock to take apart) maybe you can find out which pins on the big docking station plug get shorted for power. In many cases, it's just one pin that gets shorted to ground.

    Heck, you might even be able to use a meter to test for continuity between the existing power button and pins on the dock port. just make sure all batteries/etc are removed from the laptop when probing the connector. the first thing i would test is to see if either of the power button's pins are already a ground by checking one side of the switch against the metal shields inside the laptop, then start probing the dock connector against the other side of the switch.
    Previous: CamryAmp 1.0 - 95 Camry SE V6 Coupe (sold)
    Current: CamryAmp 2.0 - 98 Camry CE V6 5spd (still bench-testing)

  3. #283
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    The laptop is a few years old and the dock isn't made for it anymore. The ones that I found online go for about $400. The reason that I used my old laptop for this project in the first place was so I wouldn't have to fork out lots of money to complete the install.

  4. #284
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    Jul 2006
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    seattle
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    W3bMa5t3r, thanks for the schematic.
    I just built one for myself, work greats!

  5. #285
    Variable Bitrate rizaydog's Avatar
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    Can the usb loop be pluged into a hub?

  6. #286
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    Jun 2008
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    3
    Can the remote wire running from the module be hooked up to the PAC AAI-NIS2's remote wire? Click here for more info on the AII-NIS2. It has a negative remote wire and I don't really know if thats different from the remote wire on this module. Or could I just tie into the remote running to my amplifier or deck? Please help!

  7. #287
    Variable Bitrate
    Join Date
    Nov 2007
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    303
    It should work just as well using a hub, yes.

    BTW, W3bm4st3r you can count me as one more satisfied customer. It works great, and the price is right.

    I have one question: does anyone know how much current or power the USB connection draws? I'm trying to figure out if I am in any danger of overtaxing my laptop's USB ports from all of the stuff I have hanging off of them.

  8. #288
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    Dec 2006
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    85

    Possible issue?

    Webmaster - I have one of your devices, probably 15-18 months old if I recall.

    I've got an issue that is either by design and I've never noticed, or something went wrong. I'm not an EE to be able to look at the circuit and see if it is by design.

    If I manually shutdown/hibernate my laptop and then turn the power off, your module is sending the momentary pulse to the switch turning the laptop back on.

    In other words, the momentary pulse is sent on any transition of ignition voltage (except when the USB has power)

    So is that working as designed or did something go bad or I do something?

    Kevin

  9. #289
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    Aug 2008
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    18
    Quote Originally Posted by klundy View Post
    In other words, the momentary pulse is sent on any transition of ignition voltage (except when the USB has power)
    I'm not w3bm4st3r, but I did just build a working version of the module, so I suppose that qualifies me.

    First off, it's definitely not by design. When the 12v powers off, it should open the 12v relay, which would leave no way to complete the circuit except by the remote switch.

    If it's sending the pulse when you kill the power, it sounds like either the relay is doing some weird "flapping" and not opening properly, or the second terminal is shorted into the circuit somehow.

    One other thing I'd consider is just the wiring of your vehicle. Maybe there's some brief 12v surge in transitioning to off from ACC? Weirder things have happened.

  10. #290
    Variable Bitrate rizaydog's Avatar
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    I purchased this module from w3bm4st3r and it works perfectly. Although I have never soldered before, and it took me several attempts and two burns, I got it done. It works great. I tried using the shutdown software that he recomends but it doesn't work on my pc. I run a cut down version of xp called tinyxp. It's small, boots quickly, and shuts down in about two seconds. But I think it must be missing a lot of ms stuff because some software I cant get working.

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