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Technical Timed relay

Discussion in 'The Hokey Ass Message Board' started by cerial, Dec 12, 2014.

  1. cerial
    Joined: Mar 3, 2012
    Posts: 120

    cerial
    Member
    from Michigan

    I am going through and updating my electrical section by section. I currently have a steering colum with the turn, brights, wiper, horn, and key all wired together in a non tilt.
    From a maintace standpoint I will be moving everything out of this colum for better access.
    I like paddleshifters and will have 4 switches behind the wheel.
    The low/high beams will be controlled by a on/off/on switch located lower right.
    The horn is located lower left.
    The turn signals are the upper right and left switches. The horn and turn signals will be momentary switches pulled to activate then pulled off with springs.

    To turn off the flasher I want to use a timed relay between the switch and flasher. I would like 8 to 15 seconds of run time which should give 3 or 4 flashes.
    The wiring is simple, main on which feeds all, to turn switch, to timed relay, to flasher relay, to light. I want to use a secondary relay for the flashers so I can add led or more lights without adding another timer.
    I am thinking of using 2 relays one for dash turn side which will allow me to run more flasher relays.
    The timer is what I am stuck on. I looked at the page in the link below discussing timed relays with no indication of voltage or time on.

    http://www.macromatic.com/blog/understanding-time-delay-relay-functions/

    If someone can point me towards the right Timed relay that would be helpful.
     
    bobj49f2 likes this.
  2. GirchyGirchy
    Joined: Mar 17, 2011
    Posts: 283

    GirchyGirchy
    Member
    from Central IN

    You want an Off Delay timer with a Control Switch Trigger. Part number TR-51666-07 should work fine. Pins 2 & 7 are battery voltage and ground, 5 & 6 would go to the turn signal switch, and pin 3 would be the +12VDC out to the flasher.

    BTW, you would need two of these, one for right, one for left, unless I'm not understanding what you're trying to do.

    http://www.macromatic.com/literature/catalog/time-delay-relays/#?page=22
     
  3. Girchy is right, you'll need two relays, one for each side. You'll probably choke on the price; although I didn't see a price on these specific relays, typical industrial delay relay prices are $60 and up each. These are rather large and also require a socket. There's a real thicket of options on these, you need a clear understanding of how you want the circuit to work to select the right relay.

    I'll throw out an alternative; most motorcycle turn signals work pretty much the way you want yours to. There's a lot of options out there for bikes, from ready-made to DIY units, some for conventional lamps, some for LEDs. Here's one option... http://www.wolstentech.com/products/timedelayrelay/app6.php , there's others out there. The downside is most of these are designed for specific loads, so if you want to change/add lamps later, you may need to start over. If you have an output from your speedometer, these can also be had for auto-off based on a time/distance calculation.
     
  4. cerial
    Joined: Mar 3, 2012
    Posts: 120

    cerial
    Member
    from Michigan

    Anything adjustable is going to be big and expensive. The size is more of a issue then cost.
    I will have 2 switches, 2 timed relays, four or more flashers. I am running 5 flashing lights per side right now off one relay. I want to divide it up with 4 relays to keep everything even voltage wise. I have bedrail lights that don't flash that have 4 lights per side. It would be nice to have the option of having these light up.
     
  5. GirchyGirchy
    Joined: Mar 17, 2011
    Posts: 283

    GirchyGirchy
    Member
    from Central IN

    Do a search for Fuji Timer Off Relay and you'll come up with several...those should work and appear to be much cheaper and smaller. IIRC the Macromatics are made in the US however.
     
  6. Jimmy2car
    Joined: Nov 26, 2003
    Posts: 1,707

    Jimmy2car
    Member
    from No. Cal

    You may also want to post your question on 12volt.com.
    If it has anything to do with auto electrical, those guys will know
     
  7. cerial
    Joined: Mar 3, 2012
    Posts: 120

    cerial
    Member
    from Michigan

  8. GirchyGirchy
    Joined: Mar 17, 2011
    Posts: 283

    GirchyGirchy
    Member
    from Central IN

    I don't think that will work...didn't listen to the video with sound, but that appears to be a Timer On relay, not a Timer Off. It delays the output from being enabled - you need one which instantly enables the output and delays it from turning back off.
     
  9. Last edited: Dec 15, 2014

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