Results 1 to 5 of 5

Thread: Stay alive while cranking

  1. #1
    Newbie
    Join Date
    Jan 2004
    Posts
    15

    Stay alive while cranking

    There is a lot of discussion over "tank" circuits and other ways to keep your car-pc alive while cranking

    When testing my computer system i hooked the invertor directly to the battery, without using a relay or anything, i noticed the computer stayed alive whilst cranking

    The current setup has a relay, controlled by the ACC+ line to trigger it. As the car cuts out the ACC while cranking, the invertor shuts off, killing the computer power.

    As the invertor survived the "crank" when i tested it, the cutout isn't because of the voltage draw of the starter.

    Logically couldn't i put a smallish capacitor on the ACC+ line (used as the relay trigger) to keep voltage supplied to the relay whilst cranking? Would this work? would there be any possible harm to anything if it tested this?

  2. #2
    Constant Bitrate P4_2.66GHz's Avatar
    Join Date
    Feb 2004
    Posts
    217
    You'll need to isolate capacitor used and the relay by a diode. Otherwise, the capacitor will get discharged by the rest of the electrical system.
    Capacitor, however, will need to have big capacity to hold the relay for long. I'd say try 4,700 uf.

    You're not likely to hurt anything, if wired correctly.

  3. #3
    Maximum Bitrate sfay93's Avatar
    Join Date
    Feb 2004
    Location
    Omaha, NE
    Posts
    777
    Or, you could just hook it directly to one of the ignition wires. They maintain 12V through the crank.

  4. #4
    MySQL Error MatrixPC's Avatar
    Join Date
    Sep 2003
    Location
    Beach City, Socal
    Posts
    4,053
    2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
    89 Supra Turbo P3 600E@750/Abit BE6 II, Alpine M-BUS Car2PC.
    Y2K Accord Dell GX150
    RoadRunner is the best FE PERIOD
    EmoRebellion is a SCAMMER

  5. #5
    Newbie
    Join Date
    Jan 2004
    Posts
    15
    yeah, i've already looked at that thread, but it's alot less hassel if i can use a cap, as i won't have to run another wire to the back of the car, and wont have to unscrew half the dash to get to the wire.

Similar Threads

  1. How to keep your invertor alive while cranking.
    By MiniRX7 in forum Power Supplies
    Replies: 37
    Last Post: 07-27-2005, 10:03 AM
  2. Need to find acc wire that stays alive during crank.
    By Bobby Digital in forum Power Supplies
    Replies: 17
    Last Post: 02-05-2004, 06:42 PM
  3. Replies: 6
    Last Post: 10-16-2003, 12:50 AM
  4. Rotormasters.com stay away!
    By spyhunter in forum Classified Archive
    Replies: 1
    Last Post: 08-07-2003, 01:46 PM
  5. IRman repeat delay wont stay enabled...
    By Cadillac_LoungN in forum ME Archive
    Replies: 0
    Last Post: 04-18-2003, 03:50 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •