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Thread: Sproggy drains the hell outta my battery

  1. #1
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    Sproggy drains the hell outta my battery

    I have built the MK2.5 and have had no problems with it powering my 464Mhz Celeron (overclocked) with 64MB and a WD 10.2 GB HDD. However, the 92MM fan I put in it continues to run even when I put it in standby mode, so after about 3 or 4 hours of letting the car sit, the battery will no longer start the car. Anyone else here use standby or suspend-to-ram with the Sproggy supply?

  2. #2
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    The fan should be hooked to the acc,so it goes off with the key,the computer should also shut off after a specified amount of time,and not hours or your battery will go dead!!no matter what you power it with.

  3. #3
    FLAC PatO's Avatar
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    What kind of mobo do you have? I have a BH6 with that same problem. When I suspend, the cpu fan etc shuts off, but the ps fan does not. I did some further investigation and found that all of the leads from the (keypower) ps were still running - the power supply was at full power. Very good way to drain a battery!
    So I've concluded that the motherboard and/or ps are not compatible with the same spec for "standby".
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    You know...that is very interesting as I have an Abit BM6 in the carputer which is roughly the same generation as the BH6 (which I also have in a box) Maybe new motherboard is the solution here.

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    Maximum Bitrate CrazyLittle's Avatar
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    how about "Don't use STR?"

  6. #6
    jol
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    Originally posted by CrazyLittle
    how about "Don't use STR?"
    well, can you spell "boot times"

  7. #7
    Maximum Bitrate CrazyLittle's Avatar
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    Well it's up to you of course. I can live with a 25sec boot time and no dead battery for $0, more than shelling out another $50 just to shave those boot times.

    on another note, hasn't it been pretty much stated that a sproggy will still draw a considerable amount of power on STR because there's no dedicated "on" 5vcc standby circuit?

  8. #8
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    CrazyLittle is right.
    You should make a sub circuit in your PSU (in this case sproggy) that will supply this minimum current at 5V , while the rest of the PSU will be off (off - not just without load!) in order to keep STR.
    As for the fan in these home made PSUs, in my opinion the easiest way to make it turn off at these low power modes, is to supply it through one of the drive power connectors, who are supposed to turn off anyways.
    Just make sure that the Sproggy psu doesn' t get hot (=need the fan) at this low load!

  9. #9
    Maximum Bitrate CrazyLittle's Avatar
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    Originally posted by Dimitris1976
    CrazyLittle is right.
    Woo hoo!! *does happy dance*

    Actually, I'm getting the sproggy 2.6 kit from Maestro, so it might behoove me to figure out some way to hook up another 5v circuit outside of the relay's control and then I'll have that ability too.

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