Page 35 of 38 FirstFirst ... 2526272829303132333435363738 LastLast
Results 341 to 350 of 378

Thread: Laptop Auto Power-On / Turn-On Module

  1. #341
    Newbie
    Join Date
    Apr 2006
    Posts
    25
    hey did he come back and/or start building these again?

  2. #342
    Newbie
    Join Date
    Apr 2006
    Posts
    25
    hm let me try this one again... does anyone have any part numbers I could use to order the parts? its actually been a pain trying to track down the exact specifications... they dont have the exact same parts at radioshack!

  3. #343
    Constant Bitrate Gibson99's Avatar
    Join Date
    Aug 2004
    Location
    Houston, TX, USA
    Posts
    171
    Quote Originally Posted by ideal2545 View Post
    hm let me try this one again... does anyone have any part numbers I could use to order the parts? its actually been a pain trying to track down the exact specifications... they dont have the exact same parts at radioshack!
    thats where i got my parts - radio shack. the only one i had to compromise on was the capacitor - it was a 50v not 35, so the delay was longer (which is fine by me). works fine.
    Previous: CamryAmp 1.0 - 95 Camry SE V6 Coupe (sold)
    Current: CamryAmp 2.0 - 98 Camry CE V6 5spd (still bench-testing)

  4. #344
    AhX
    AhX is offline
    Newbie
    Join Date
    Apr 2010
    Posts
    4
    Are these being made again?

  5. #345
    Mod - all of it.
    Join Date
    Jul 2007
    Location
    Buena Park, So Cali
    Posts
    524
    W3bm4sters last visit to MP3car was almost a year ago. So no I don't think they are being made again.
    CAR: 2007 G35 Sport Coupe 5AT
    HARDWARE: Dell D630 w/ dock, internal 80G HD, internal 320G HD, Verizon Wireless Card, iBlue GM-2 GPS w/iGuidance, OBDPros w/DashCommand, Visteon HD Radio w/ Home Made Cable, Current Version of RR w/ DFX Skin. My Install.

  6. #346
    AhX
    AhX is offline
    Newbie
    Join Date
    Apr 2010
    Posts
    4
    in that case anyone have a full parts list?

  7. #347
    Constant Bitrate Gibson99's Avatar
    Join Date
    Aug 2004
    Location
    Houston, TX, USA
    Posts
    171
    Quote Originally Posted by AhX View Post
    in that case anyone have a full parts list?
    i built mine using a parts list from the very beginning of the thread, and modified to suit my particular application.
    Previous: CamryAmp 1.0 - 95 Camry SE V6 Coupe (sold)
    Current: CamryAmp 2.0 - 98 Camry CE V6 5spd (still bench-testing)

  8. #348
    Newbie bakin113's Avatar
    Join Date
    Sep 2008
    Location
    Murrieta, California, United States
    Posts
    32
    Quote Originally Posted by mikepgp View Post
    figured it out - working great..i used info from this site
    http://www.simprojects.nl/toggle_to_momentary.htm
    ignore the "keyboard part" but i'm using an SPDT relay that goes on and off with my ignition key and once it returns "un-powered state" the the output goes negative and give me another "pulse" to initiate shutdown as if pressing the power button again.



    should integrate this into your boards for those of us wanting a shutdown w/ keyoff


    actually, i'm not using this for a computer or a car for that matter; but rather using a programmable thermostat in my home to turn on and off my "window air conditioner unit" which has a momentary push-button on and off, so i can use the temperature sensing and timer unit of my programmable thermostat to control my air conditioner..
    Did you change the original schematic by moving the capacitor to the other side of the +12 relay coil?

    Im trying to modify this to shut down when the car is off as well..
    Hardware: Two Diamond Audio D3 10" subs, 7" Lilliput eby701, 2.7Ghz AMD 45w Sempron, Gigabyte mobo, 512MB nVidia 9800, 1GB RAM, 500 GB, M4ATX

    Software: OpenMobile

    My First Build

  9. #349
    Newbie
    Join Date
    May 2010
    Posts
    2
    In case anyone is struggling to translate the original diagram to their circuit board, as I was, here's a more detailed diagram. This follows the original circuit that W3bma5t3r posted in his initial post:



    Components:

    Circuit Board (Radioshack: 276-159)
    12V 1A relay (Radioshack: 275-0241)
    5V 1A relay (Radioshack: 275-0240)
    1000uF 35W Electrolytic Capacitor (Radioshack: 272-1019)
    10K-Ohm .25W Resistor (Radioshack: 271-1335)
    Momentary Powerswitch (Radioshack: 275-1547)


    More pics to follow after its built. Also, does anyone know why there's a diode in W3bma5t3r's one diagram, and not the other? What's its purpose?

  10. #350
    Newbie
    Join Date
    Nov 2007
    Posts
    13
    The diode is there to protect the voltage supply. When the relay closes it generates something known as back EMF which is essentially a very large voltage spike that can often blow semi conductors. It's less important on the unregulated 12V line as most cars will have voltage spike protection but I'd add it all the same as it's very good practice (and ECUs cost thousands!). You almost certainly want one on the USB relay as well.

    I've made up my own module that connects to the interior light circuit so it starts the computer when you walk up to the vehicle (meaning you can do a cold startup and still not suffer any delays when in the vehicle). I can post it but it does use a PIC which would have to be programmed. More than happy to make up some units or even just the pics if there is interest....but I am UK based.

Similar Threads

  1. Laptop Power On I've Searched Help Please
    By TimStark in forum Laptops, Netbooks, Tablets, UMPCs, etc.
    Replies: 17
    Last Post: 02-28-2007, 06:59 PM
  2. laptop power on off
    By onlineamiga in forum Laptops, Netbooks, Tablets, UMPCs, etc.
    Replies: 4
    Last Post: 12-20-2005, 10:33 PM
  3. Any downsides to a laptop car adapter as a power source?
    By BlackAWD in forum Laptops, Netbooks, Tablets, UMPCs, etc.
    Replies: 9
    Last Post: 11-20-2005, 05:59 PM
  4. Power laptop from headunit?
    By LordSnow in forum Newbie
    Replies: 12
    Last Post: 04-07-2005, 09:25 PM
  5. Power button extention on a laptop
    By oafdawg in forum General Hardware Discussion
    Replies: 7
    Last Post: 05-18-2004, 08:26 PM

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
  •