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MEXICOWANDERER's avatar
MEXICOWANDERER
Explorer
Jan 20, 2014

New Batch 10 watt LED's Arrive Back Spasms

Yep, they arrived. Made an adapter connector to connect a pair of plates to a 12.24 volt regulated power supply.

Eight of the twelve have one LED segment that does not light

Two of the twelve have more than one LED segment that does not light.

Two of the twelve have all 20 LED chips light up.

"Hmm, seem sorta dim. Rechecked voltage. 12.24."

"Checked watts. 2.6 watts each, whether 20 segments lit or 18"

Rechecked instrumentation. Verified OK. But substituted got same reading. Two point six WATTS for a device rated 10 watts.

Each plate is about as bright as a $2.99 Harbor Freight battery powered LED trouble light. You know, the blue ones.

So my chuckle grew into a laugh, then a belly laugh, then aw jeez, a cramp. I had to go lay down.

I came down to the store, got online, and read a "so sorry for tardy shipment" email apology from the Chinese vendor. They are sending another dozen free. I am going to be the regional baron of almost good white LED 12 volt lighting. God my side hurts! Oh yeah, the originals cost $2.99 ea free shipping.

38 Replies

  • Gdetrailer's avatar
    Gdetrailer
    Explorer III
    Jan 25, 2014
    MEXICOWANDERER wrote:
    BOOKMARK CITY !!!

    Thanks folks. It's no joke, down here bent nails are scrounged, straightened and resold.


    I can believe it!

    Search engines can be your best friend provided you figure out the correct "key words" to search with..

    Check out this search using "surplus electronic parts"

    HERE

    Another thing is the search engine.. I tend to find a lot more using...

    DOGPILE.COM which uses multiple search engines at the same time..
  • NinerBikes's avatar
    NinerBikes
    Explorer
    Jan 25, 2014
    Since acquired by CTS

    http://www.ctscorp.com/components/sfcatalog/Thermal_Mgmnt_Products.pdf
  • MEXICOWANDERER's avatar
    MEXICOWANDERER
    Explorer
    Jan 25, 2014
    BOOKMARK CITY !!!

    Thanks folks. It's no joke, down here bent nails are scrounged, straightened and resold.
  • Gdetrailer's avatar
    Gdetrailer
    Explorer III
    Jan 25, 2014
    Alltronics

    CLICK HERE

    Heat sinks starting at $.12 each! Yep, TWELVE CENTS EACH.

    Digikey

    CLICK HERE

    BIG selection of heatsinks!

    Electronic Goldmine ($10 min order)

    CLICK HERE

    Heat sinks

    GOLDMINE 10W LED

    10W LED chip (Theirs are more expensive but you could combine chip(s) and heat sink(s) from this same site to get above min order..)
  • MrWizard's avatar
    MrWizard
    Moderator
    Jan 24, 2014
    you DO REALIZE, he is deep in Mexico, and such places do NOT exist anywhere near him, you did read the complete thread ?
  • NinerBikes's avatar
    NinerBikes
    Explorer
    Jan 24, 2014
    go to a supply house and hunt down aluminum extrusions and you can cut to whatever length you want. Or find a few dead Charge controllers and canabalize the heat sinks off of them.
  • MrWizard's avatar
    MrWizard
    Moderator
    Jan 24, 2014
    MEXICOWANDERER wrote:
    You bet, and thank you, rather than glue it to a crushed Tecate can, what and where would a person find correct heat sinks for these 20 watt chips?


    would this do ?


    4-inch by 2.5-inch

    large heat sink 1.95
  • GordonThree's avatar
    GordonThree
    Explorer
    Jan 24, 2014
    surplus cpu coolers are a great bargain... I picked up 40 of them, like 10lbs of aluminum for $20 off flea-bay once, and I think shipping was flat-rat from USPS, 9 bucks or so.
  • mena661's avatar
    mena661
    Explorer
    Jan 24, 2014
    pianotuna wrote:

    I know Tesla is using led technology for head lights.
    Most all of the new cars have at least LED tailights. Others have LED daytime running lights (DRLs) too and a very few number of cars are trickling out with LED headlights. The tech is proven it's just that most folks exposure to LEDs is the cheap, chinese stuff. There are really good LEDs on the market (I use strictly Philips in my house but Cree is great too), you just have to pay for them. I don't mind experimenting with the chinese stuff in my RV as I don't live in it and they're cheap enough to throw away if it doesn't work BUT if I did there are still sources for good quality LEDs (well if I did live in my rig I'd convert it to 120V only).
  • NinerBikes's avatar
    NinerBikes
    Explorer
    Jan 24, 2014
    I used to work for IERC, we made transistor heat sinks back in the day.

    basic heat sinks aluminum fingered.specs.

    A UP3 to66 had , if I recall correctly longer fingers than a UP2 T066, more heat dissapating features.

    They are probably still out there, they were one of our best all time sellers.

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