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Thread: DSATX killed my battery yet again :(

  1. #1
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    DSATX killed my battery yet again :(

    I posted this on Mpegbox.com about a month ago and never recieved an answer. So maybe someone here can help me. I went out to my car to start today and it had a dead battery again, I want to keep my carputer in standby mode when the car is off(yes know about hibernate but thats not what I want for many reasons). I want the computer to keep the 5vsb alive for as long as possible. however I also want to be able to start my car too. So I wanted the DSATX to monitor my battery voltage then shutdown the 5vsb ONLY if my car's battery is about to die for example if battery drops below 11 volts. Is this mode possible I do have the brainstem, or would it require a firmware update.

  2. #2
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    It's nearly an impossible mission to protect the battery only based on monitoring the voltage under this situation.

    The discharge current could be less than 1A while the computer is in hibernate mode, and the battery was already dead when the voltage enen drops below 12V at this low discharge current.

  3. #3
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    Quote Originally Posted by pmp99t View Post
    I posted this on Mpegbox.com about a month ago and never recieved an answer. So maybe someone here can help me. I went out to my car to start today and it had a dead battery again, I want to keep my carputer in standby mode when the car is off(yes know about hibernate but thats not what I want for many reasons). I want the computer to keep the 5vsb alive for as long as possible. however I also want to be able to start my car too. So I wanted the DSATX to monitor my battery voltage then shutdown the 5vsb ONLY if my car's battery is about to die for example if battery drops below 11 volts. Is this mode possible I do have the brainstem, or would it require a firmware update.


    http://mpegbox.com/pdf/DSATX_Manual.pdf

    Page 4,

    "P2* Low Voltage Adj: In Basic Mode, clockwise rotation raises the low voltage threshold (10V-12V)"
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

  4. #4
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    what you want to do is impossible...sorry to say that.. standby will kill you battery eventually..very early and in a few hours.. no 100% protection against thet..if you insist on doing that..then get your self a second battery and a battery isolator..then leave your pc in standby.

  5. #5
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    My battery has a 120-minute Reserve Capacity. That's a 120-minutes of a 25A draw before the voltage drops under 10.5V. Call it 2 hours at at 11V, that's 550W-Hr. Even if my computer consumes 10W on standby (it shouldn't, I think), that should mean the battery can sustain it for 55 hours. Overnight should be easy. No? What am I not realizing here?

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    it is not a matter of overnight..not starting your car is risky..it is something you don't want to have on your mind all the time...hell life has many other problems..no need to add even more.. forget about capacity and stuff, you will never be able to calculate your time allawance..(this also changes when your battery gets older..) do your self a favour and use hibernate/get another battery

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    Quote Originally Posted by Nomader View Post
    it is not a matter of overnight..not starting your car is risky..it is something you don't want to have on your mind all the time...hell life has many other problems..no need to add even more.. forget about capacity and stuff, you will never be able to calculate your time allawance..(this also changes when your battery gets older..) do your self a favour and use hibernate/get another battery
    I use an M2 ATX and Standby. My battery is fairly new. I have left the car idle for as much as 80 hours, and the car started fine.

    No 2nd batttery is needed. As for doing it with YOUR system (with an unknown power draw) and the DSATX it should be possible.

    Michael
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

  8. #8
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    The way I have the DSATX setup it should do voltage monitoring, I have read and re-read the manual several times. However the DSATX is just not working properly. My computer has been left on overnight a few times due to windows not really going into standby. The way the manual reads the DSATX should cut power to computer after a predefined voltage threshold is reached, however in practice it does not. I have tested the battery voltage with a multimeter right after one of these incidents and it is around 6-7 volts while the DSATX is set to shutoff after 11.4 volts. Is this yet another DSATX firmware issue? or is the feature on the DSATX just broken???

  9. #9
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    Quote Originally Posted by pmp99t View Post
    The way I have the DSATX setup it should do voltage monitoring, I have read and re-read the manual several times. However the DSATX is just not working properly. My computer has been left on overnight a few times due to windows not really going into standby. The way the manual reads the DSATX should cut power to computer after a predefined voltage threshold is reached, however in practice it does not. I have tested the battery voltage with a multimeter right after one of these incidents and it is around 6-7 volts while the DSATX is set to shutoff after 11.4 volts. Is this yet another DSATX firmware issue? or is the feature on the DSATX just broken???
    It is hard to say. When the voltage is 6 or 7 volts, how do you know that the DSATX hasn't shut down already. Maybe it shut down at 11volts, but your battery dropped much lower for other reasons.

    This might mean that you need to leave the computer in standby, and then every hour or half hour, check the voltage of the car battery, and when it drops below 11, check the DSATX to see if it shutdown (I would probably just turn the key to the run position, with out starting, and see if the computer comes back from standby, or if it reboots). How do you know that you have set it correctly?

    Michael
    ...I love the French language...especially to curse with...Nom de Dieu de putain de bordel de merde de saloperies de connards d'enculés de ta mère. You see, it's like wiping your *** with silk, I love it.

  10. #10
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    1. When did you buy your DSATX?
    2. What does the sticker on the back say?
    3. Have you used the brainstem serial adapter to load any custom settings in?
    4. Have you tried putting the p2 pot in the center at 11 volts and seeing if it doesn't kill the battery?
    5. Did you try loading factory defaults with the brainstem?
    MPEGBOX - Plexiglass Computer
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