Powering my project, need help plz

Discussion in 'General Electronics Chat' started by jakethehusky, Apr 2, 2016.

  1. jakethehusky

    Thread Starter New Member

    Mar 24, 2016
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    I just finished my rgb controller that works with pc via an Arduino nano. I use mosfets to use the higher current, for powering the rgb ledstrip I need 12V DC and around 0,700 A. I don't have any adaptors/transformers laying around that would work out.

    What would be the best place to buy one? Is there anyway around using another one and modifying it ?
     
  2. jpanhalt

    AAC Fanatic!

    Jan 18, 2008
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    What are your size limits? One option is to get a discarded PC and use its power supply. I still use one.

    Another option is MPJA or Jameco/ Each has lots of inexpensive supplies

    http://www.mpja.com/
    http://www.jameco.com/webapp/wcs/stores/servlet/StoreCatalogDrillDownView?langId=-1&storeId=10001&catalogId=10001&categoryName=category_root&subCategoryName=Power Supplies & Wall Adapters&category=45

    You will need to choose between an open chassis, enclosed unit, or wall wart.

    There are also numerous surplus dealers, like Electronic Goldmine, Allelectronics, and Surplus Center.
    http://www.surpluscenter.com/
    http://www.allelectronics.com/
    http://www.goldmine-elec-products.com/

    Finally, you could consider a battery charger. If you go that route, I recommend using a 12V regulator.

    John
     
  3. KeepItSimpleStupid

    Well-Known Member

    Mar 4, 2014
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    Just a reminder, 12 VDC and current greater than or equal to 0.7A (700 mA). 12 VDC @ 1 A is a common adapter.
     
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  4. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Use an atx psu, or laptop psu.
     
  5. InspectorGadget

    Active Member

    Nov 5, 2010
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    Laptop PSU's are usually 16-19V. I don't think he needs that much.

    An ATX PSU is often load-dependent. You might have to put a load resistor on the 5V to get the 12V to work.

    Better to find a 12V brick somewhere. Any electronic catalog will have one, surplus store will have one even cheaper.
     
  6. jakethehusky

    Thread Starter New Member

    Mar 24, 2016
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    I am looking around trying to find an old 12V 1A adapter, so far no luck. What is the best place to buy these ?
     
  7. Dodgydave

    Distinguished Member

    Jun 22, 2012
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    Ebay, second hand shops, buy and sell, car boot....
     
  8. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
    2,802
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    Amazon, Adafruit, Digikey, ...
     
  9. KeepItSimpleStupid

    Well-Known Member

    Mar 4, 2014
    1,142
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  10. wayneh

    Expert

    Sep 9, 2010
    12,094
    3,033
    For what it's worth, the power supplies that ship with a lot of computer peripherals (hard drives, routers) are 12V and are rated to supply 1A or more. If you have an electronics recycling spot anywhere nearby, you can probably grab a few of them for free.
     
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