Page 4 of 4 FirstFirst 1234
Results 31 to 35 of 35

Thread: Convert a flashing signal to a constant signal?

  1. #31
    Constant Bitrate P4_2.66GHz's Avatar
    Join Date
    Feb 2004
    Posts
    217
    What I am getting at is to make your system work with a controller, just like the rest of the ACC based ones.
    Something tells me that your car, just like mine, has an illumination around the ignition key. This is where you need to tap in. I am hoping it is positive wire based and not the negative one, otherwise a relay would be needed. A voltmeter can be used to determine it.
    If it is positive based, all you need to do is to wire 1 diode from the positive wire to the ACC input of the controller board. Another diode, placed the same way, needs to be wired from the ACC wire to the ACC input of the controller board.
    If you unlock your car and get to it before the dome light turns off, controller board will keep thinking the ACC signal is present. Then, when you turn your key, it will provide ACC and override dome light input.

    When you turn off your ignition key, normal shut-down sequence would initiate.

  2. #32
    Raw Wave god_of_cpu's Avatar
    Join Date
    Jan 2004
    Location
    SilverSpring Maryland
    Posts
    2,960
    I like it!

    I'll have to investigate my illumination when I go home.

    Quote Originally Posted by P4_2.66GHz
    What I am getting at is to make your system work with a controller, just like the rest of the ACC based ones.
    Something tells me that your car, just like mine, has an illumination around the ignition key. This is where you need to tap in. I am hoping it is positive wire based and not the negative one, otherwise a relay would be needed. A voltmeter can be used to determine it.
    If it is positive based, all you need to do is to wire 1 diode from the positive wire to the ACC input of the controller board. Another diode, placed the same way, needs to be wired from the ACC wire to the ACC input of the controller board.
    If you unlock your car and get to it before the dome light turns off, controller board will keep thinking the ACC signal is present. Then, when you turn your key, it will provide ACC and override dome light input.

    When you turn off your ignition key, normal shut-down sequence would initiate.
    StreetDeck.com Developer (I am Chuck)
    Get StreetDeck at http://www.streetdeck.com
    The Official StreetDeck Forums have moved, please visit us at http://www.streetdeck.com/forum for official support for Streetdeck.

  3. #33
    Raw Wave
    Join Date
    Jun 2003
    Posts
    1,823
    Any chance you could e-mail me pics of your circuit diagram?

    Heres the diagram :

    The first diode is a 1N4148 (1N4001 etc will do), this just ensure that low voltage from the pulse cannot discharge the capacitor. The diode across the relay coil is a 1N4001 or similiar.

    The transistor is a BC547B or similiar...something with a very high gain is better.

    You just have to play around with the resistor and capacitor, it effect the time the relay is on for...the time before the next pulse is needed before the relay cuts off.

    The relay need to have a coil resistance of 400 Ohms or more else the transistor may have problem driving it.

    With a 47uF and a 10K resistor, a triggering voltage of 12V should work well with it.

    Well I dont know if you want to use a relay but it may be useful for someone as it is.

    Hope that helps
    Attached Images Attached Images  

  4. #34
    Variable Bitrate stimps's Avatar
    Join Date
    Nov 2001
    Location
    brisbane
    Posts
    326
    U need an off delay timer circiut. Make a 555 timer circiut, that keeps looking at an input signal, and as long as the signal stays off for more than a second or two, THEN it will go low. If the input goes high again, the timer goes high agian, and stays high for at least 2 seconds.

    that way when the LED comes on and flashes on and off, the output will stay on!

    Theres plenty of 555 timer circiuts around on the net and in books. Should be no problem.

  5. #35
    Raw Wave god_of_cpu's Avatar
    Join Date
    Jan 2004
    Location
    SilverSpring Maryland
    Posts
    2,960
    I tried the capacitor thing, but I havent gotten it to work. It appears that the on off time is more like 2.5s off .1s just not enough time to charge the capacitor enough. I also checked out my illumination around the key, but it goes off and on whenever the door opens too, so thats not going to work.

    The timer idea seems like the best to use now. I found this page that I'm gonna use:
    http://www.uoguelph.ca/~antoon/gadgets/555/555.html



    Quote Originally Posted by stimps
    U need an off delay timer circiut. Make a 555 timer circiut, that keeps looking at an input signal, and as long as the signal stays off for more than a second or two, THEN it will go low. If the input goes high again, the timer goes high agian, and stays high for at least 2 seconds.

    that way when the LED comes on and flashes on and off, the output will stay on!

    Theres plenty of 555 timer circiuts around on the net and in books. Should be no problem.
    StreetDeck.com Developer (I am Chuck)
    Get StreetDeck at http://www.streetdeck.com
    The Official StreetDeck Forums have moved, please visit us at http://www.streetdeck.com/forum for official support for Streetdeck.

Page 4 of 4 FirstFirst 1234

Similar Threads

  1. FS: LCD Controllers - $90.00+shipping
    By infrared in forum Classified Archive
    Replies: 98
    Last Post: 07-20-2003, 09:30 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
  •