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Easy to mount on panel, idiot proof LEDs?

Discussion in 'Electronic Design' started by Ignoramus11409, Jun 6, 2006.

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  1. I will soon have a to make a panel for my welder.

    While I will have a serial display (4 lines of 20 characters), I think
    that it would be good to have separate LEDs indicating status of each
    relay. (mine are 4pdt, which means that I can always attach 12V to each
    of them)

    Relays and display are pictured here

    http://igor.chudov.com/projects/Welding/11-New-Rectifier/panel-0.jpg


    What I would like to find is a LED that is easy to mount (like most
    switches, drill a hole and tighten a nut), also it would be nice to
    have a resistor already added for 12V, but that's optional. With most
    LEDs, I do not even know how to mount them :-(

    i
     
  2. Ignoramus11409 wrote:

    Don't kid yourself, for _every_ idiot-proof design, nature produces
    better idiot!

    Have fun

    Stanislaw
    Slack user from Ulladulla.
     
  3. John - KD5YI

    John - KD5YI Guest


    A "panel mount led" search on Mouser produced the following...

    • Chicago Miniature LED Panel Mount (112)
    • Dialight LED Panel Mount (9)
    • Dialight LED Panel Mount .156in Snap In (41)
    • Dialight LED Panel Mount .25in Snap In (90)
    • Dialight LED Panel Mount 10mm Mounting Hole (10)
    • Dialight LED Panel Mount 5mm Mounting Hole (6)
    • Dialight LED Panel Mount 6mm Mounting Hole (17)
    • Dialight LED Panel Mount 7mm Mounting Hole (25)
    • Dialight LED Panel Mount 8mm Mounting Hole (22)
    • Dialight LED Panel Mount 9mm Mounting Hole (17)
    • Dialight LED Panel Mount Watertight (27)
    • Lumex LED Panel Mount Indicators (2,247)
    • Mountain Switch LED Indicators (4)
    • Xicon LED Indicators (12)

    Here is a page from the Mouser catalog for example:
    http://www.mouser.com/catalog/626/29.pdf

    I'm sure DigiKey has similar.

    There was no mention of "idiot proof", however.

    Cheers,
    John
     
  4. Sounds easy enough. I may give it a try, would they hold reasonably?

    i
     
  5. mc

    mc Guest

    What I would like to find is a LED that is easy to mount (like most
    You drill a hole exactly the right size and press the LED into it. This
    works best with plastic panels. If the hole is slightly too big, you put a
    tiny bit of airplane glue on the side of the LED.
     
  6. GregS

    GregS Guest

    If you do it right, they might not come off.
    Easy to mount but the wiring is more problematic than the mount.

    I do this all the time mostly with metal panels. If you take the time
    it will work with any material, perhaps not with TFE.

    greg
     
  7. Rich Grise

    Rich Grise Guest

    You _could_ just drill the right size holes, and glue LEDs in place
    directly. You'll still have to deal with the leads. I've also seen
    little circuit boards with LEDs mounted, that just poke through holes
    when the board is in place.

    There's also little plastic clippy-thingies that poke through and
    have a retaining ring, but glue is probably cheaper and less labor-
    intensive. :)

    Good Luck!
    Rich
     
  8. Rich Grise

    Rich Grise Guest

    They stay fine, until you whack them from the front with a hammer or
    something. ;-) (BTDT)

    Cheers!
    Rich
     
  9. I have used lenses that snap into a 1/4" hole and the LED is held in
    grooves from behind, but they sometimes break or get loose, and you should
    use some glue. You also need to connect wires to the leads and insulate
    them with shrink tubing, which is time consuming.

    If the LEDs are on a PCB, you can just drill holes a little bigger than
    their diameter, and mount the PCB from the back of the panel using spacers
    to adjust how far they protrude. The limiting resistors can be mounted on
    the same board (220 ohms SIPs are handy), and you can connect the display
    board to the main board with ribbon cable. LEDs with built-in resistors are
    more expensive. You can get larger snap-in panel mount LEDs that have
    bridge rectifiers also, so you can use AC or any polarity DC with a range
    of voltages, but they are about $2 each. Idiot-proofing has its price.
    There is also the trade-off of component cost vs assembly time/cost, and
    your preferences for size, appearance and visibility.

    Paul
     
  10. John Fields

    John Fields Guest

     

  11. Radio Shack has a chrome LED holder with a nut to hold it to the
    panel. There is a two hole rubber plug that holds the LED in the chrome
    holder. I've used the for 20 years or more on power supplies, and rough
    environments to protect the LEDs.


    --
    Service to my country? Been there, Done that, and I've got my DD214 to
    prove it.
    Member of DAV #85.

    Michael A. Terrell
    Central Florida
     
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