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Thread: Kill/'Live??' switch?

  1. #1
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    Kill/'Live??' switch?

    Right my remote on lead is gonna be coming from my Clifford alarm so that when i dis-arm the alarm it boots the PC and vice versa.
    i was planning on having a switch in my remote on lead so that if i was putting the car in for a serivce, etc i could flip it and it wouldn't boot next time that the system was dis-armed. so it would normally be closed to allow the signal through
    that is switch 2 in the diagram

    then i thought about when i get petrol and want to keep the PC on rather than go through a hibernate/resume cycle

    if i add a second switch (number 1) could i flip this when i get out of car so that when i arm the alarm (to go pay) it gives the opus a 12v signal still and keeps it running?



  2. #2
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    Quote Originally Posted by GreenBeast
    Right my remote on lead is gonna be coming from my Clifford alarm so that when i dis-arm the alarm it boots the PC and vice versa.
    i was planning on having a switch in my remote on lead so that if i was putting the car in for a serivce, etc i could flip it and it wouldn't boot next time that the system was dis-armed. so it would normally be closed to allow the signal through
    that is switch 2 in the diagram

    then i thought about when i get petrol and want to keep the PC on rather than go through a hibernate/resume cycle

    if i add a second switch (number 1) could i flip this when i get out of car so that when i arm the alarm (to go pay) it gives the opus a 12v signal still and keeps it running?



    Sorry, but we need a little more information.

    What signal is present on the wire coming from the alarm that will signal the computer to start.

    And when you say "so that when i dis-arm the alarm it boots the PC and vice versa" do you mean that when you boot the computer, it will disarm the alarm (vice versa means the reverse, so since the alarm starts the computer, the computer starts disarms the alarm) I bet not, just want to confirm, some people have interesting ideas about what the ocmputer should/can do?

    Most likely you will need some sort of diode to isolate the alarm from the "second" switch so that when used, it does not affect the alarm, but more information is needed.

    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.

  3. #3
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    right, the alarm will boot the computer and it will also shut it down, i.e. when i go to my car it boots and when i leave it shuts down

    i have spoken to my alarm installers and they reckon they should be able to do a switched 12v feed off the alarm for this. (cliffords are very flexible and competant alarms)

    so hopefully when the system is dis-armed the wire from the alarm will run 12v (as though its the ignition)


    yeah i figured about the diode (sorry its not in the diagram, thought about it later)

    basically switch one is to keep the pc running when i go to pay for petrol or quickly run in my house but want the car locked and PC on
    and switch 2 is a kill switch so that the pc doesn't boot next time i come to the car (i.e.service, etc..)

  4. #4
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    I would use a SPDT switch, with center off. You also won't need a diode if you do this, cause the 12volts positive never connects with the Alarm wire. There are other ways, but with out more information about how the alarm will be configured, and wired, this is probably the best choice, with the least amount of switches.

    This way, when the switch is in the center, nothing flows through it, and the computer will remain off. If you put it in position 1, then the Alarm will control it. If in postition 2, then constant power will control it.

    A simple diagram.

    ...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.

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    thankyou. quite liked the idea of having separate switches so that i could hide the kill switch out of the way of curious fingers...
    but leave the other handy for myself as it would get the most use but be useless to anyone else

  6. #6
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    you should use a SPDT, just to avoid using diodes in case there's any voltage difference between the alarm output and the constant 12v. however, I would suggest not using a center-off switch, and adding a second switch (SPST, "kill" switch like before) in series with the SPDT output line. that way you can still have the kill switch hidden... and not to mention, it's slightly easier to find 2-position (ON-ON) SPDT switches than the 3-position ones with center off. (ON-OFF-ON)

    you could even get fancy and get a key lock switch for the kill switch or something. I am not sure but I THINK I have seen switches that act like a lock of some sort, ie - you can switch it by hand once, but to switch it back you need the key. then you could lock it really easily without fumbling for the key, but nobody could unlock it on you without the key... just a thought
    But don't take it from me! here's a quote from a real, live newbie:
    Quote Originally Posted by Viscouse
    I am learning buttloads just by searching on this forum. I've learned 2 big things so far: 1-it's been done before, and 2-if it hasn't, there is a way to do it.
    eegeek.net

  7. #7
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    thats quite cool. cheers
    so how would i have it wired with the SPDT and SPST then?
    sorry i'm not great with this sort of thing

    thankyou

  8. #8
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    You would just throw the additional switch on the line that is going to the Opus. That way, no matter what the non hidden switch is set to, the hidden switch will still kill the PS.

    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.

  9. #9
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    well i managed to find a on-off-on switch today, black to match dash just hope its not too big

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