Need help for a basic function

Discussion in 'The Projects Forum' started by tubachris85x, Oct 25, 2013.

  1. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    While I am fairly alright at simpler stuff, I'm still learning as I go with this side of the house..

    I'm working on a replica prop star wars blaster which requires the following:


    -Power: 9v---->Need both LEDs using one power source

    -1 Blue LED---->wired to STSP; Must operate independently

    -1 White LED--->wired to momentary/"trigger" switch; Must operate independently


    The idea would be for me to be able to flip the STSP to turn on the Blue LED to keep it on, while being able to operate the white LED on it's own when pressing the momentary switch to simulate "firing" the blaster prop. I'd like to be able to have it all run off the 9v as it will save me considerable space.

    I drew out a rough schematic, where it would be wired in parallel, however, it needs critiquing (attached)

    Thank you in advance for any help...

    -TC
     
    Last edited: Oct 28, 2013
  2. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    It looks fine; you will be running your LEDs at just over 16mA (until the battery voltage starts dropping.)
     
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  3. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    So you think it looks correct?

    I did begin wiring/testing last night, though I think perhaps I did something wrong, as I could not get the LEDs to operate individually.
     
  4. wayneh

    Expert

    Sep 9, 2010
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    Other than spelling ohms wrong, the drawing makes sense. It should work. Post a photo of your wiring if you haven't got it working yet. LEDs backwards, maybe?
     
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  5. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    Sorry, didn't get but maybe 2-3 hours of sleep a night this week...my attention to detail is slacking at the moment.

    As for the drawing, I *think* it's alright, though this has been my first wiring project where I've actually started creating a schematic to figure it out, so I apologize for the lack of formal knowledge.

    I'll probably take everything apart tonight and start "fresh." As for the LEDs being backwards, I don't think they were, I tested each to determine +/- leads.
     
  6. tshuck

    Well-Known Member

    Oct 18, 2012
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    How does shorting a battery look fine?:p

    If you want to keep the GND label, remove the connection to +9V...
     
    Last edited: Oct 25, 2013
  7. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    Trying to refine the drawing...was doing some research on the site..not sure which one (or if both) will work
     
  8. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    Yea a buddy just point that out to me.
     
  9. tshuck

    Well-Known Member

    Oct 18, 2012
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    Both are valid, however, the logic of the left diagram shows that the the blue LED will come on when the switch is closed and the white will come on only when the switch and the button close the loop.

    The one on the right describes the independent functionality you want...
     
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  10. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    Roger. Looking at it, the leftside diagram (to me) now logically seems the best route, at least for this application, since the STSP will control the overall circuit, in of unwanted handling/use, or even storage of the prop, pressing the button switch won't do anything.
     
  11. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Maybe doing Yoga at the time? :rolleyes:
    Max.
     
  12. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    I'm way too large to justify doing yoga.
     
  13. wayneh

    Expert

    Sep 9, 2010
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    Oops. Funny, I was drawn more to a misspelled word than to a shorted power supply.
     
  14. tracecom

    AAC Fanatic!

    Apr 16, 2010
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    :eek: I have an excuse, but it's too lame to use.
     
  15. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    Project finished early saturday night. Thanks for your help! Here are some pics of the finished prop

    http://imgur.com/a/tu1EU
     
  16. tshuck

    Well-Known Member

    Oct 18, 2012
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    Wow, that looks fantastic! Great job!
     
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  17. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    Thank you! :)
     
  18. tracecom

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    Apr 16, 2010
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    It looks very believable. Is the "well worn" finish intentional, or did it just not matter?
     
  19. tubachris85x

    Thread Starter Member

    Oct 25, 2013
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    Intentional. This is one of the side arms for a Republic Commando costume for his son. I initially didn't intend to do this much weathering, but I felt it necessary to give it a real-world look. I was going for an "original trilogy" look. He essentially gave me creative freedom though as long as it didn't stray too far off from accuracy.

    The center tube was from an acrylic tube which was sanded to give it the frosted appearance, then I placed a section of white light-diffusing plastic, which for the most part, eliminates the overall profile of the blue LED. I just wish I could have put a sound board and amp to give it that extra characteristic
     
  20. tracecom

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    Apr 16, 2010
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    I don't know what it's supposed to sound like, but adding sound is very doable.
     
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