Close
Results 1 to 10 of 32

Thread: LED lighting

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    QUITTER Irving's Avatar
    Join Date
    Nov 2008
    Location
    Denver, CO
    Posts
    46,527
    Blog Entries
    1

    Default

    So power supply --> relay --> switch?

    Usually when I wire a switch into low voltage DC I put the switch on the negative cable, can I still do that with the relay?
    "There are no finger prints under water."

  2. #2
    Self Conscious About His "LOAD" 00tec's Avatar
    Join Date
    Sep 2011
    Location
    Aggieland, TX
    Posts
    4,275

    Default

    Quote Originally Posted by Irving View Post
    So power supply --> relay --> switch?

    Usually when I wire a switch into low voltage DC I put the switch on the negative cable, can I still do that with the relay?
    Yes, but you will need both + and - at the relay to make it function.
    Using this as a diagram (ignore their notes)


    To switch using the negative wire:
    Run your + from the power supply directly to the LED strip AND pin 86 on the relay.
    Run your - from the power supply to the reed switch AND pin 87 of the relay
    Run a wire from the reed switch (the NO or normally open contact) to pin 85 of the relay
    Run a wire from pin 30 of the relay to the - on your LED strip.

    This way, your reed switch only sees the power needed to switch the relay on and off (not much), while the relay handles the full power that the strip draws.
    Last edited by 00tec; 01-06-2018 at 10:04.

Posting Permissions

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