spdt relay?

Discussion in 'The Projects Forum' started by gizmotech, Feb 22, 2009.

  1. gizmotech

    Thread Starter New Member

    Feb 22, 2009
    3
    0
    Hey all,

    New to this forum. Have posted in other electonics forums but still haven't
    gotten a clear cut answer to my question.
    I have a simple chaser light project being hooked up to my car. So it's 12v
    dc control module.
    I have 8 lamps that I am connecting 12v power to so when the unit is powered on, ALL the lamps will illuminate at the same time. The problem that I am running into is that after power is initially applied to all the bulbs, I want the power to cease being applied to all the lights simultaneously and "switch" over to the control unit that will start the
    chaser sequence.
    I have enough electronic knowledge to know that I could use a spdt relay
    for this but don't know how to hook it up. I have googled for information on spdt relays and I have an idea of how I might go about it but I would
    like to get some "professional" advice.
    If anyone could help, that would be greatly appreciated.

    Thanks in advance (I hope)!!!!!
     
  2. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Perhaps you can share the schematic of your circuit? Maybe the feature can be implemented in a simplier fashion.

    hgmjr
     
  3. gizmotech

    Thread Starter New Member

    Feb 22, 2009
    3
    0
    Well I don't have one ready (have to see if I can find it somewhere).
    But basically it's a pic controller (was a kit a bought about 3 years ago,
    company long since gone), with 8 transistors to control the output lights.
    Don't know if this will help any.
     
  4. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Nope, not much help.

    hgmjr
     
  5. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    PIC microcontrollers generally have a maximum Vcc/Vdd of around 5.5v; more than that and they'll get fried. If you're planning on using it in an automotive application, a voltage regulator circuit is a must.
     
  6. gizmotech

    Thread Starter New Member

    Feb 22, 2009
    3
    0
    It was designed for 12v applications. Again it was a kit I bought a few years ago. Just wanted to give it an "updated feel" to it.
    Will try to draw something up that is close to what have (might not be in
    schematic form though).
     
  7. Bernard

    AAC Fanatic!

    Aug 7, 2008
    4,172
    397
    Here is one way. Values just guesses.About 1/2 sec as shown.
     
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