Calling all DIY LED builders for some tips

Discussion in 'Anything DIY Related' started by VicZA, 10 Jul 2015.

  1. VicZA

    VicZA

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    Hey all DIYers,

    Can you please share ideas and tips on how you secure your Chip LED onto the alluminium heatsinks ? I am obviously talking about the "star-shaped" unit with the chip already mounted. Screws, putty, glue, etc .... please tips and tricks (with pics would be awesome)

    Thanks

    Victor
     
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  3. BarryRoux

    BarryRoux

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    I used heatsink paste on the Alluminium with a spot of silicone on the side to mount the heatsink to my frame and heatsink paste under the led and solder to hold it to the heatsink
     
  4. VicZA

    VicZA Thread Starter

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    Hi @BarryRoux what silicone did you use - and does it handle the heat well ?
     
    Last edited by a moderator: 26 Nov 2015
  5. dallasg

    dallasg Moderator MASA Contributor

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    use Artic silver paste, sticks well and works great

    can use normal tank silicone
     
  6. VicZA

    VicZA Thread Starter

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    is Artic silver paste to replace the "thermal cement" ?
     
  7. dallasg

    dallasg Moderator MASA Contributor

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    its the same thing, used to mount heatsinks on CPU's
     
  8. JackSplat

    JackSplat

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    Artic silver paste is great yes. They also make a two-compound thermal adhesive. I used the adhesive on my build, works like a charm. You will never get the leds of again though...
     
  9. Toolboysa

    Toolboysa Moderator

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    Also used the 2 part thermal adhesive from arctic
     
  10. CameL

    CameL

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    Drill a small pilot hole, and use some PC screws for HDD's. It's so small that the screw will make it's own thread.
    Obviously be realistic, don't drill a 1mm hole for a 6mm screw.
     
    Last edited: 10 Jul 2015
  11. VicZA

    VicZA Thread Starter

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    Though this idea is more labour intensive, I like it. Also saw some guys in other forums mention that they use acrylic washers to make sure there is no possibility of short-circuit but I wouldn't know where to get that from
     
  12. Ricky W

    Ricky W

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    I did the screw thing and it does take longer to do but when the leds pop it makes replacing really easy. On my next build I'll use silicone and see how it goes. Another thing is make sure u make a splash screen. Salt spray is a beech for leds
     
    Last edited: 11 Jul 2015
  13. VicZA

    VicZA Thread Starter

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    Ricky did you use nylon washers ? What screws did you use and where did you get them ? Will definitely make a splash screen (perspex)
     
    Last edited: 11 Jul 2015
  14. JackSplat

    JackSplat

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    Polycarb (2mm) is the best easy to find splash screen IMO. If you use screws, be careful not to put too much strain on the LED PCB, it might cause them to fail in the long run.
     
  15. BarryRoux

    BarryRoux

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    Hi VicZA I used normal marine silicone it seems to be doing very well .
     
  16. Ricky W

    Ricky W

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    I got small stainless screws but u need to make pilot holes first. Silicon will be easier and doesnt not get affected by heat at all.
     
  17. VicZA

    VicZA Thread Starter

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    Where did you get the screws from ? Hardware ?
     
  18. Ricky W

    Ricky W

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    Got them from a hardware store in PE.
     
    Last edited: 13 Jul 2015
  19. Omnitank

    Omnitank

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    Hey buddy, I might be old school, but this is what I did: bore two pilot holes for every led and then I bought stainless screws from Mr Screw in PE. After putting on some heat paste, I used a normal paper punch and made a lot of holes in the plastic of a 2 litre milk bottle. Pinch a small hole right in the middle of every plastic disc to create a plastic washer (it prevents short)
    Only after this time consuming job will I solder the wires on.
    If you're in PE, pop in and have a look at my unit. It's been running for almost 2 years without any trouble.
     
  20. Omnitank

    Omnitank

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    I see that you're in Nelspruit, so I'll try and find a pic for you
     
  21. Franske

    Franske

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    What I did, read on a pc junky forum guys use it for pc components getting way hotter than leds is to put a small dot of thermal paste, normal not the expensive stuff, in the middle of the led and a metal super glue (most stick to metal) around that, glued it on and getting good thermal conductivity since my heat sink gets quite hot.
     
    Last edited: 14 Jul 2015
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