Results 1 to 9 of 9

Thread: 12v vs 5v LEDs

  1. #1
    Join Date
    Dec 2012
    Location
    Lake Forest, CA
    Posts
    9
    Post Thanks / Like

    Default 12v vs 5v LEDs

    Just trying to get an understanding of why one would pick 12v over 5v or vice-versa.

    Thanks in advance!

    -Jerry

  2. #2
    Join Date
    Dec 2011
    Posts
    6,219
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    It depends on the element in question as to wether 12v or 5v is the solution .

    Most , if not all RGB strip is 12v . Now if you get into pixel strip or strings there are many variants of 12v and 5v , for pixel strip the actual fcb is designed differently for 12v than 5v .

    I have a fair bit of both 12v and 5v elements and for my needs I prefer 5v over 12v .

    unfortunatly I like rgb strip and it is 12v . rgb and pixel strings are abundant in 5v and 12v .

    Also it is possible that 12v can power an longer strip or string of pixels than 5v without color degradation .

  3. #3
    Join Date
    Jul 2008
    Location
    Pearland, Tx (sometimes) and anywhere on the globe the rest of the time
    Posts
    3,275
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    There is a lot of confusion about this. It is all about compromise.

    When you have 12V and your LEDs have a forward voltage of say 3V...you have to drop the supply by 9V.
    NEGATIVE: This is WASTED POWER given off as heat to the resistors.
    POSITIVE: It is easier to transmit current over longer distances (this is the color degradation angus mentions above).

    When you have 5V and your LEDs have a foward voltage of 3v...you have to drop the supply by only 2V.
    POSITIVE: Less power waste
    NEGATIVE: Large amounts of current at 5V are very susceptible to voltage drop. This typically requires multiple power injection points along a string.
    WLC Ventures is now [URL="http://radiant-holidays.com"]Radiant Holidays![/URL]

  4. #4
    Join Date
    Jan 2008
    Location
    Fountain Valley, CA (Orange County, So. Cal)
    Posts
    2,147
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    Quote Originally Posted by g2ktcf View Post
    When you have 12V and your LEDs have a forward voltage of say 3V...you have to drop the supply by 9V.
    NEGATIVE: This is WASTED POWER given off as heat to the resistors.
    Doesn't this depend on how the LEDs are connected? For example, in the LED strip that has LEDs in groups of 3 in series, it only needs to drop ~ 3V. You end up using the same 60 mA for 3 LEDs instead of 1, so there is less current needed at 12V in this case.

    don
    Click for display details >>
    web site: http://www.eShepherdsOfLight.com or http://www.facebook.com/eShepherdsOfLight
    technical articles: http://downloads.eshepherdsoflight.com

  5. #5
    Join Date
    Jul 2008
    Location
    Pearland, Tx (sometimes) and anywhere on the globe the rest of the time
    Posts
    3,275
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    Quote Originally Posted by djulien View Post
    Doesn't this depend on how the LEDs are connected? For example, in the LED strip that has LEDs in groups of 3 in series, it only needs to drop ~ 3V. You end up using the same 60 mA for 3 LEDs instead of 1, so there is less current needed at 12V in this case.

    don

    That is always a possibility...it is a compromise so knowing the schematic of what you are buying is important.
    WLC Ventures is now [URL="http://radiant-holidays.com"]Radiant Holidays![/URL]

  6. #6
    Join Date
    Nov 2011
    Location
    Las Vegas, Nevada, U.S.
    Posts
    2,156
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    I have been seeing more and more 24v led strips as well. I think I will be sticking with 12v. I have already heard what happens if you make a mistake and run 5volt stuff on 12v by accedent.
    "Jack of all trades, master of none,

    Certainly better than a master of one"
    Projects:
    [URL]http://hackaday.io/project/1092-Raptor12-AC-light-controller[/URL]

    Videos
    [URL]http://www.youtube.com/user/KingOfKYA/videos?flow=grid&view=0[/URL]

  7. #7
    Join Date
    Oct 2011
    Location
    Albuquerque, NM, US of A.
    Posts
    633
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    Let me guess, the magic smoke gets out?

  8. #8
    Join Date
    Jun 2009
    Location
    Ottawa, Ontario, Canada
    Posts
    2,846
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    Standard Disclaimers apply:
    "Product may not appear as shown, your mileage may vary, I'm not a doctor nor do I play one on television, these are not the droids you seek"

  9. #9
    Join Date
    Nov 2011
    Location
    Las Vegas, Nevada, U.S.
    Posts
    2,156
    Post Thanks / Like

    Default Re: 12v vs 5v LEDs

    Yep refering to that post
    "Jack of all trades, master of none,

    Certainly better than a master of one"
    Projects:
    [URL]http://hackaday.io/project/1092-Raptor12-AC-light-controller[/URL]

    Videos
    [URL]http://www.youtube.com/user/KingOfKYA/videos?flow=grid&view=0[/URL]

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •