Results 1 to 9 of 9
  1. #1
    75+ Posting Member Infinity's Avatar
    Join Date
    Mar 2009
    Location
    Houston, TX
    Posts
    87
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Power Supply for LEDs

    Ok, so I want to power LEDs controlled through a simple on/off switch. I've googled and am tired. Someone please help.

    What is the best way to power the circuit. I thought about using a PC PSU, but wasn't sure how to safely wire everything together.

    I'm looking at about 30 LEDs all wired seperately through independant toggles. (such as fuel pumps, ice protection, etc. - meaning each switch illuminates it's own light) Perhaps there is an easier way. I don't plan to have all LEDs illuminated at once, but I also don't want to blow the circuit in case I do.

    I could power each LED seperately with a simple battery, but that seems a bit excessive in my opinion, not too mention space depriving. What would you all recommend?

    P.S. I don't have the LEDs so I can't provide the volts, but can figure that out later once I figure out what power supply to use.

  2. #2
    150+ Forum Groupie
    Join Date
    Oct 2010
    Location
    Australia
    Posts
    166
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    Hi Infinity,

    This will help you as well http://led.linear1.org/led.wiz you can design an LED Array and you can say how many LED's you are using in the array and tell it what voltage you will be using (Some information about the LED is required and it will design the array and tell you what resistors to use.

    Kind Regards

    Bernie.
    E8400 @ 3.0GHz, DDR2 Ram 800MHz 4Gb, Vista Home Premium 64Bit, MSI 9800GT @ 512Mb, Philips 22" LCD Widescreen, Cockpit Setup X 5 using Wideview and Widetraffic.

  3. #3
    25+ Posting Member weyes's Avatar
    Join Date
    Oct 2008
    Location
    Germany
    Posts
    54
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    I am using an old PC power supply and I am quite satisfied. Cabling is very easy: for powering on you have to connect a blue cable to one of the black cables. Then each red cable with the black (ground) gives +5V and each yellow cable with the ground gives +12V.

    You can find a lot of video on youtube showing how to connect the blue cable to power on.

  4. #4
    75+ Posting Member Infinity's Avatar
    Join Date
    Mar 2009
    Location
    Houston, TX
    Posts
    87
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    What is the recommend method for connecting all those LEDs to the psu? Bus tie??? Direct???

  5. #5
    Warren fsaviator's Avatar
    Join Date
    Dec 2008
    Location
    Dupont, WA
    Posts
    506
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    I like to use busses. One for the positive and one for the negative. The sky is the limit though. Any connection you want can be used.

    What are your LEDs for? If for backlighting, you may want to consider dimming. In that case, I would buy one of those $4 dollar dimmers on the net, connect it to the PSU via the bus, then connect the LEDs to it.

  6. #6
    75+ Posting Member Infinity's Avatar
    Join Date
    Mar 2009
    Location
    Houston, TX
    Posts
    87
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    Thanks guys. So group all the same color wires together (red, black, yellow) from the PSU and connect them to separate buses. Then connect the negative wire from the leds to the negative bus, the positive to the positive bus. Right so far?

    Wire in the switch and resistor for each led and that should do it I think. What gauge wire should I use for the led circuits?

    It's for annuciators, not backlighting, though I may consider a dimmer.

  7. #7
    300+ Forum Addict


    tiburon's Avatar
    Join Date
    May 2007
    Location
    Amsterdam
    Posts
    353
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    [QUOTE=weyes;128901]I am using an old PC power supply and I am quite satisfied. Cabling is very easy: for powering on you have to connect a blue cable to one of the black cables. [/QUOTE

    I think that should be the green wire and the black wire.

  8. #8
    25+ Posting Member weyes's Avatar
    Join Date
    Oct 2008
    Location
    Germany
    Posts
    54
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    Quote Originally Posted by tiburon View Post

    I think that should be the green wire and the black wire.
    You're right it is the green wire: http://www.youtube.com/watch?v=u0OKm...eature=related

  9. #9
    google2012
    Join Date
    Feb 2012
    Location
    google2012
    Posts
    1
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Power Supply for LEDs

    Good post!