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Looking for Power Adapter

Started by trans, March 01, 2014, 08:36:16 pm

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trans

I just bought a LIME and I am looking for a suitable power adapter. I read the adapter has to be regulated (See http://microcontrollershop.com/product_info.php?products_id=6423). Is that true? If so can anyone recommend one? I can't seem to find one.

P.S. I am in the U.S.

trans

Oh, I should add that I will be running the board and a 2.5in HDD. Looking at the specs for each I think that means I need at least 2.3A of power.

trans

I talked to a rep of Super Power Supply, and they assured me that the following power adapter is regulated.

    http://www.newegg.com/Product/Product.aspx?Item=9SIA3M31AH6414

So I am going to try it.

trans

Well, I got it in the mail and it turns out to be completely the wrong plug. It's a 2.5x0.7mm which is way too tiny. So I am looking for the right spec and I can't find it anywhere.

Does any one have the proper spec for the power adapter it needs? What is the width of the power plug?

dave-at-axon

Can't you just cut off the wrong one and replace it with the correct one?

trans

Thanks for the suggestion! Yea, I could do that, but I want to make sure I have a supplier if my project works out and I build more units.

Thankfully a helpful voice from OLIMEX just gave me the info I needed:


  • the power jack on LIME is standard

  • you need adapter with 5.5mm outer diameter and 2.1 mm internal diameter inner pin is positive

  • regulated this means it must be exactly 5V and not exceeding this value as otherwise the board will be damaged

  • some adapters are not regulated this means they are 5V under load but are with bigger voltage if not loaded this will be a problem

  • you can check if the adapter is regulator very easy: with multimeter you measure the voltage with no load it should be 5.0V



Which clarified why I was having such a problem finding an adapter --I was looking for 2.5mm instead of 5.5mm.