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Thread: NBv3 wiring check please!

  1. #1

    Default NBv3 wiring check please!

    Hey guys, I'm working hard on my first saber w/ a NBv3 soundboard. Just need an experienced forum member to check my initial wiring diagram for me. I'm new to this and I feel like I've got something wrong here... splicing wires is confusing the hell out of me

    Slide1.jpg


    also can't seem to find the forward voltage of the red LED's in the RRW Luxeon Tri-rebel. TCCS product page doesn't have it

    (Edit: I'm planning on having the AV switch lit after pulling the kill key)

  2. #2

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    Found this info on the single red rebel in the store: Red 106lm @ 700mA 2.4v - Run at 700mA do not go over 700ma in your calculations for the resistor, much more than that and the rebel tend to burn out. You'll also want to run the two reds in parallel, each with their own resistor, rather than in series as you have it in the diagram. The forward voltage will be added together in a series set up, and the 3.7 volts from the battery will not be enough to light the led properly in that case. Everything else looks good, but don't try nd solder three wires to the ground pad on the board....the two ground terminals on the switch can share a sinlge lead back to either the board or to the ground on the recharge port for a cleaner wiring job.

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  3. #3

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    doesnt my diagram show the Red LED's wired in parallel? Or am I misunderstanding Madcows video?

    Also, where would I add the second resistor ?

  4. #4

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    That Tri-star is wired parallel in your diagram.

    Rather than having two wires crossing each other over the top of the star, it would be better to have a Y-splice on your (+) and (-) wires leading to the LEDs. You can put the appropriate resistors on each of the (+) wires leading to the two LED dice.
    We all have to start somewhere. The journey is all the more impressive by our humble beginnings.

    http://led.linear1.org/1led.wiz for the lazy man's resistor calculator!
    http://forums.thecustomsabershop.com...e-to-Ohm-s-Law for getting resistor values the right way!

  5. #5
    Sith Warrior darth_chasm's Avatar
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    Default

    They are in parallel; however, the issue of not having a dedicated resistor for each die remains in this type of set up. Madcow may do this, but he is aware of the risks involved.

    Basically, if the diodes vary in voltage, which they very well may, the one with the lower voltage will attempt to "steal" all the current, leading to shorter lifespan. When that one blows, the next one will. It's much better to buy two resistors for some pocket change rather than have to replace a $20+ led star.

    To wire in two resistors simply make a Y junction between the board and the leds. Add the resistors to the branches of the Y.
    Last edited by darth_chasm; 01-21-2016 at 06:09 AM. Reason: Grr took too long typing

  6. #6

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    Also, you might as well add one extra wire and resistor to get the Flash on Clash working.

  7. #7

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    Quote Originally Posted by War Machine View Post
    doesnt my diagram show the Red LED's wired in parallel? Or am I misunderstanding Madcows video?

    Also, where would I add the second resistor ?
    Yep, you did...my mistake, misread the pads on the star in your diagram.

    Got a question? Start Here. Have you tried the Thread Index yet? Most questions can be answered there.

  8. #8

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    Thanks for all the help guys, much appreciated! here's an updated wiring diagram with your suggestions and calculated resistor values:

    R = (3.7v - 2.4v) / 0.7A = 1.86 ohm

    P = (0.7A)^2 * (1.86 ohm)= 0.9 Watts

    Saber Wiring 2 (2).jpg

    Am I right in assuming the red LEDs on the tri-rebel have the same specs as the Single Red rebel stars?

    If so is this resistor the one to use? : http://www.thecustomsabershop.com/2o...stor-P946.aspx

    EDIT: Sorry, the picture uploader made my diagram tiny for some reason.
    Last edited by War Machine; 01-21-2016 at 11:16 AM.

  9. #9

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    Yes, the single Reds are the same ones used on the Tri-Rebel. Your calculations look correct to me.
    We all have to start somewhere. The journey is all the more impressive by our humble beginnings.

    http://led.linear1.org/1led.wiz for the lazy man's resistor calculator!
    http://forums.thecustomsabershop.com...e-to-Ohm-s-Law for getting resistor values the right way!

  10. #10

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    Wouldn't the FOC LED also require a resistor?

    -tnx,
    Jeff

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