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Thread: The power-off delay circuit

  1. #1
    FLAC ppgt94's Avatar
    Join Date
    May 2001

    Post The power-off delay circuit

    I was planning one building this circuit ( ) to kill the power if I forget to shutdown or cut power one day. The only problem is, I noticed that when my key is in acc my computer runs fine. Then when I go to start my car, the voltage drops and causes the pc to reboot. So I might run into a problem here, what do ya think? Anyone else have this occur to them?

    [ 08-09-2001: Message edited by: Carlos C ]

  2. #2
    Constant Bitrate
    Join Date
    May 2001


    carlos, I don't think you can do much about this unless you got an aux battery. i have had varied results with this. Usually when the comp has been running off the battery for over 15 minutes and i start the car, the voltage will drop too much to keep my psu going, but if its been on for only a short amount of time and i start the car it seems to work fine. maybe you could do some more tests and see what results you have?
    Athlon 500, 128 MB, ATI Xpert 4MB AGP TV-Out, Sound Blaster Live! Value, 8.4 GB, 2x20 Backlit LCD, Keypower 250 Watt ATX DC-DC, DSchmitd Startup/Shutdown Controller, IRMan + Backlit IR Remote, Custom Keypad, 5.6" NTSC LCD, In-Dash Slot Loading DVD, all installed in an '87 Honda Accord LX-i

  3. #3
    Retired Admin Aaron Cake's Avatar
    Join Date
    Jan 2000
    London, Ontario, Canada


    A second battery will help. A DC-DC will probably solve the problem, for about the same price as a second battery.
    Player: Pentium 166MMX, Amptron 598LMR MB w/onboard Sound, Video, LAN, 10.2 Gig Fujitsu Laptop HD, Arise 865 DC-DC Converter, Lexan Case, Custom Software w/Voice Interface, MS Access Based Playlists
    Car: 1986 Mazda RX-7 Turbo (highly modded), 1978 RX-7 Beater (Dead, parting out), 2001 Honda Insight
    "If one more body-kitted, cut-spring-lowered, farty-exhausted Civic revs on me at an intersection, I swear I'm going to get out of my car and cram their ridiculous double-decker aluminium wing firmly up their rump."

  4. #4
    Join Date
    Jan 2001


    Considering it's $30 for a battery isolator and $30-40ish for a battery Aaron is correct


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