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Thread: Trouble finding a barrel connector for laptop

  1. #11
    Low Bitrate hypnotiq's Avatar
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    What if i use a the connector from my orginial power source that has a third pin, would it trick the laptop into thinking that i'm using the original charger?

  2. #12
    FLAC strohj's Avatar
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    why not just buy a used power supply for cheap on ebay??
    Pentium 4m 1.5GHz|MB896|Roadie Extreme|XM-Direct|Rikaline 6010|T-View 7"|Streetdeck|160gb Western Digital|1Gb DDR2-533 Ram

  3. #13
    Raw Wave shotgunefx's Avatar
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    Quote Originally Posted by hypnotiq View Post
    What if i use a the connector from my orginial power source that has a third pin, would it trick the laptop into thinking that i'm using the original charger?
    It's not a simple voltage divider like some, it actually has a chip in it the supply that talks to the laptop. What they say to each other, no one knows (or at least not google when I first researched it)

    First of all, you sure you have one of those supplies? I think you do, but not 100%.

  4. #14
    Variable Bitrate billmee's Avatar
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    Quote Originally Posted by shotgunefx View Post
    It's not a simple voltage divider like some, it actually has a chip in it the supply that talks to the laptop. What they say to each other, no one knows (or at least not google when I first researched it)
    well now I feel like checking this thing out.

    I wonder if the pc can be powered by a simple 19v psu with the battery removed ? maybe some of the necessary communtication is to the battery.

  5. #15
    Low Bitrate hypnotiq's Avatar
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    I was reading this post by bugbyte:

    P1900 + Dell Laptop and docking station

    and it describes my charger exactly. So i also believe that i do have one of those connectors.

    My originial question has never been answered though, if i cut off the end of my OEM dell charger would that work without a doubt with my p1900 since it will have the chip in it?

    Thanks for all the help guys, i'm sure theres a bunch of other people with teh same problem

  6. #16
    Raw Wave shotgunefx's Avatar
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    Quote Originally Posted by hypnotiq View Post
    What if i use a the connector from my orginial power source that has a third pin, would it trick the laptop into thinking that i'm using the original charger?
    Quote Originally Posted by hypnotiq View Post
    I was reading this post by bugbyte:

    P1900 + Dell Laptop and docking station

    and it describes my charger exactly. So i also believe that i do have one of those connectors.

    My originial question has never been answered though, if i cut off the end of my OEM dell charger would that work without a doubt with my p1900 since it will have the chip in it?

    Thanks for all the help guys, i'm sure theres a bunch of other people with teh same problem
    The cheap isn't in the tip, it's in the power brick, no power brick, no chip. No work.

    Maybe if you could extract the chip out somehow and get it to work being powered by the p1900, maybe something could happen, maybe not. I don't know if the chip just reports info or something or it may actually be part of the charging circuit, no idea as it's all proprietary so no datasheets, etc.

    Probably the most likely solution would be for someone with an oscilloscope try and figure out what's being communicated, and then making a dummy out of a PIC that says what it wants to hear.

  7. #17
    Raw Wave shotgunefx's Avatar
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    Another possibility might be to hack the BIOS to skip the check I suppose.

  8. #18
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    first of all, the Lind is the only adapter that WILL let the battery charge.... I had a dell 700m with the large barrel connector... the Lind works 100%...

    since I swapped out the dell for a gateway that also needed 19v, but had a different plug, I cut the plug off of the lind.... it uses 3 wires of course, but it's weird.. it has like 2 different voltage feeds, & I think one has a ground level that is 5v above the other... I didn't spend a lot of time analyzing it, cause when the 2 outputs are summed, the end result is 19v, which suited my purpouse....

    I don't think there is any communication, just a weird voltage configuration.... either way, if charging the battery isn't important, then the p1900 will definitely do the job... otherwise get a lind adapter for your model & it'll charge 100%....

  9. #19
    Raw Wave shotgunefx's Avatar
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    Quote Originally Posted by turbocad6 View Post
    first of all, the Lind is the only adapter that WILL let the battery charge.... I had a dell 700m with the large barrel connector... the Lind works 100%...

    since I swapped out the dell for a gateway that also needed 19v, but had a different plug, I cut the plug off of the lind.... it uses 3 wires of course, but it's weird.. it has like 2 different voltage feeds, & I think one has a ground level that is 5v above the other... I didn't spend a lot of time analyzing it, cause when the 2 outputs are summed, the end result is 19v, which suited my purpouse....

    I don't think there is any communication, just a weird voltage configuration.... either way, if charging the battery isn't important, then the p1900 will definitely do the job... otherwise get a lind adapter for your model & it'll charge 100%....
    Maybe it was just that they (Lind) didn't work at first??? Could have sworn I read it at some point.

    Anyway, any reason to get a Lind instead of just use the PSU and a regular inverter? Certainly seems cheaper to get a regular inverter.

    Anyway, if you go the Lind route, make sure it's big enough (watts) for whatever you are going to do. A dock requires a bigger one (at least the Inspirion) and it dies at the BIOS with a power message. Funny, it won't boot with a dock if you are on battery, though if you remove the power after the BIOS post, it all runs fine on the battery.

    God I hate Dell.

  10. #20
    Low Bitrate hypnotiq's Avatar
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    Quote Originally Posted by turbocad6 View Post
    first of all, the Lind is the only adapter that WILL let the battery charge.... I had a dell 700m with the large barrel connector... the Lind works 100%...

    since I swapped out the dell for a gateway that also needed 19v, but had a different plug, I cut the plug off of the lind.... it uses 3 wires of course, but it's weird.. it has like 2 different voltage feeds, & I think one has a ground level that is 5v above the other... I didn't spend a lot of time analyzing it, cause when the 2 outputs are summed, the end result is 19v, which suited my purpouse....

    I don't think there is any communication, just a weird voltage configuration.... either way, if charging the battery isn't important, then the p1900 will definitely do the job... otherwise get a lind adapter for your model & it'll charge 100%....
    So how does the lind work? Do you plug into your cigerrete lighter? If so, how do you get the shutdown controller to work?

    Thanks

    Edit: I just googled it, damn its expensive

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