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Thread: Win 7 Hybrid Sleep and the 5 volt rail

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    Win 7 Hybrid Sleep and the 5 volt rail

    Hey eveyone...

    Upgrading the puter to an Atom and considering Win 7... Mainly for Hybrid Sleep. However, I have read this http://www.mp3car.com/vbulletin/m4-a...rid+sleep+5vsb

    It seems to indicate that Hybrid Sleep uses the 5 volt rail. I need to confirm because I built a ignition switch to disable the 5VSB when the car is off, from this http://www.mp3car.com/vbulletin/powe...r-cpu-off.html

    So anyway... would someone confirm that Hybrid Sleep requires the 5 volt rail?

    Jack

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    Nevermind.. I figured this out. I was googling for "Hybrid sleep 5 volt rail" and wasn't finding anything much.... Once I googled "S3 Standby 5 volt rail", I found it all.

    OK... So I need to remove or alter my 5 volt rail hack. What is the popular solution to allow S3 sleep and still keep the 5V rail from tanking battery?

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    Quote Originally Posted by TheJack View Post
    Nevermind.. I figured this out. I was googling for "Hybrid sleep 5 volt rail" and wasn't finding anything much.... Once I googled "S3 Standby 5 volt rail", I found it all.

    OK... So I need to remove or alter my 5 volt rail hack. What is the popular solution to allow S3 sleep and still keep the 5V rail from tanking battery?
    It depends on the PSU. All the PSUs now have battery protection. If the 5V rail lowers the battery to much, then the PSU will put the PC into hibernate and turn off.
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    I have an Opus 150. It has a protection at 11v, but all it does it start a shutdown sequence. The 5V rail is still powered regardless. I could buy a newer powersuppy with a deadman timer, but would rather not.

    Is it possible to change my 5V ignition relay into a deadman timer of sorts? Similar to my current relay, it has the circuit and input and in absense of input starts a timer to open cicruit... Is there such thing as like a micro timer relay for 5 volts?

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    Not to sound sarcastic but in order to sleep instead of hibernate the computer needs to remain powered. Typically running on 5vsb, you can run a carpc for 12 hours without any battery issues whatsoever (some users will even run 24-36 hours). The only exception would be if you had driver issues preventing s3 sleep and instead remained in s2 sleep.

    What makes you so concerned with the current draw of the 5v rail? There are quite a few power supplies that allow user selectable values (so you can set a hard off including the 5vsb at a certain voltage). I wouldn't recommend draining a battery to 11v if you want it lasting very long.

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    Understood, car/battery would be fine for a day (maybe two) with 5VSB powered. But how about the business trip or getaway? I don't know about you, but there have been weekends where I realize I never left the house... What then? Dead battery because I forgot.

    I'm looking for Standby, but with a failsafe for the 5 volt rail. I understand that some of the newer PS like Carnetix have a deadmans timer, which would solve my need. However, I don't want to spend $150 dollars needlessly. As I said, I could buy a newer powersuppy with a deadman timer, but would rather not.

    My question to the group is... Is there anyway to implement a deadman timer outside of a new PSU? I know there are some electrically creative people here and I would assume there is another way. Like a timer relay that I could put in place of my current ignition relay.

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    In that case are you willing to build something or do you want something pre-assembled? Hard to recommend the best option without knowing the vehicle and your technical abilities.

    Theres a few different ways you can go depending on how much work you want to put into it vs. how much you want to spend. They do sell timed relays but they aren't cheap. Your best option would be to build a small shutdown controller (cheapest) or to buy a small shutdown controller which will be significantly cheaper then a shutdown controller/power supply combo.

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    UMMMMM are you sure about it always keeping the 5V rail active. I have a OPUS 320 and mine does not do that. Now as far as sleep, yea, I think it stays powered, but if your battery reaches a critical low, the PSU will start your PC, put it into hibernate, then shut off completely. There will be no more power being provided to the 5V rail, otherwise the battery will still die.
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    Quote Originally Posted by HiJackZX1 View Post
    UMMMMM are you sure about it always keeping the 5V rail active. I have a OPUS 320 and mine does not do that. Now as far as sleep, yea, I think it stays powered, but if your battery reaches a critical low, the PSU will start your PC, put it into hibernate, then shut off completely. There will be no more power being provided to the 5V rail, otherwise the battery will still die.
    like said earlier in this thread the low battery cutoff is far to low for a standard car battery... in the case of the opus 150 the OP is using its 10.6V which is actually a fully discharged lead acid battery (really shortens battery life not to mention will leave you stranded).

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