Bench top power supply

Discussion in 'General Electronics Chat' started by praetor, Nov 4, 2014.

  1. praetor

    Thread Starter New Member

    Feb 14, 2010
    8
    0
    image.jpg image.jpg I would like to make this:

    DIY Small Bench Power Supply

    Which is on instructables.com or you can google or YouTube it and see the tiny power supply with ammeter. What inspired me to try this is an estate sale find, can anyone guide me to building the tiny power supply with my estate sale find? view pics.
    I'm using a barrier strip and 7V to turn lights on but that's as far as I've gotten using this: LM2596S, how exactly can I make my power supply?
     
    Last edited: Nov 4, 2014
  2. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    What is the type of LM2596, 3.3V,5V,12V,adj?
    What is your power source(V/I)?
    And the current of your LED?
     
  3. praetor

    Thread Starter New Member

    Feb 14, 2010
    8
    0
    Sorry for the lack of specific info my PC was down so i had to work off my iPhone.
    Well this is what I'd be working with:

    http://www.ebay.com/itm/V1NF-LM2596...875?pt=LH_DefaultDomain_0&hash=item338fee14cb

    from this website:

    http://www.instructables.com/id/DIY-Small-Bench-Power-Supply/

    As I described I bought the pictured electronic board, with the ammeter(s), from an estate sale. The board was included in a bundle of stuff I bought, so initially, I didn't think anything of it, I had put it away for about a year until i ran into the site listed above and thought...HEY!

    it's a step down adjustable power supply module
    I have an adjustable 12 through 24 volt power pack
    LEDS are the 3 volts 12 mA

    how would I go about connecting the above ammeters, I'm not sure of their pinouts, should I remove them from the board or what?
     
  4. ScottWang

    Moderator

    Aug 23, 2012
    4,855
    767
    7V for LED Strip Lights, then the input voltage of LM2596Adj should be 7V+3.27V=10.27V, it can be count to 10.5V, for a more stable input volatge.

    So it is a 12V adjustable power supply?

    For the led brightness and using life, normally I will using the current under 80% of rating current, here is I=12mA*80%=9.6mA, unless the brightness is not enough, otherwise I will use 9.6mA.

    The ammeter could in series with load from the power supply.

    Before you do anything you should draw the wiring connections, if you don't know the pinout the you can drawing their wiring in pcb.
     
  5. praetor

    Thread Starter New Member

    Feb 14, 2010
    8
    0
    I want to use the pictured board (above) as a panel meter so that i may know what is going on with voltage and current as i am using it for projects, say for example I wanted to attach it to this:

    http://www.ebay.com/itm/knight-elec...193?pt=LH_DefaultDomain_0&hash=item19f8de4b21

    would it be possible to do so? I mean, I eventually want to build the mini power supply I mentioned in my post but i'd like to see if i could use the electronic board, again, above, for a panel meter
     
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