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Step down regulator boards

Discussion in 'Power Supplies' started by David_AVD, Oct 16, 2011.

  1. David_AVD

    David_AVD Bite my shiny metal ass!

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    I found some little DC-DC stepdown regulator boards on AliExpress a few months ago. They use an LM2596 switching regulator and provide up to 3 Amps depending on the model. The ones I got were about USD $20 for 5 pieces delivered.

    [​IMG]

    Another ACL member found a similar item on eBay. There are a heap of variants, but if you search for LM2596, you should find them easily enough.

    Others have bought larger (higher current) versions that appear to be potted (epoxied) into a metal case / heatsink.

    These boards could be used in display elements, dropping some common supply voltage (24V DC for example) down to whatever the item needs.

    I encourage other members to post about the ones they've found and used in their displays.
     
  2. smartalec

    smartalec Im a SmartAlec what can i say! Community Project Designer

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    Ouch there Expensive david, i guess you never searched first for a cheaper supply first.
    here is a supplyer an for $20 he'll send you 7 of them. :D
    http://www.aliexpress.com/product-gs/464343022-LM2596-DC-DC-Step-Down-Adjustable-Power-Supply-Module-OT140-wholesalers.html
    Even your ebay link is cheaper, get 7 for under $20
    i have 1 for each of my ren64's, an will soon have 1 for each of my floods
    they work great an enables you to keep a constant voltage to your display (eg 24v)
    just watch with the amps tho, personally i wouldn't go higher than 2amp for the rated 3amp ones, afterall they are made in china :D
     
  3. OP
    OP
    David_AVD

    David_AVD Bite my shiny metal ass!

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    Anything under $5 a board is cheap I reckon. Remember I bought these some time ago. I see there are many suppliers of the same / similar board now. Competition must be fierce, so that's good for us. :)

    As for the current ratings, it's not a matter of "made in China". It's purely to do with the circuit and board design.

    Someone else on ACL bought some chunkier (5A ?) ones, but not sure if they've tried them out yet.
     
  4. BradsXmasLights

    BradsXmasLights WiFi Interactive

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  5. OP
    OP
    David_AVD

    David_AVD Bite my shiny metal ass!

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    Hard to say. Doesn't specify if they are switchmode or linear, but more than likely switchmode I guess. Interesting that they say AC/DC input and output - how odd !
     

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