| AC/DC Power adapter Looking for a AC Adapter that puts out 2A @12v, positive polarity. This is for an external USB drive. Now it seems the only two I can find is one online for $10 »www.newegg.com/Product/Product.a···12887010 and another in store for $36 »www.radioshack.com/product/index···rPage=60. Anyone know where I can go to get one in store for around $10?
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 tschmidtPremium,MVM
join:2000-11-12
Milford, NH
kudos:8
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| You are going to have trouble anything other then a universal supply retail. The Radio Shack one is nice because it has interchangeable tips.
If you decide to order online here is another source:
»www.mpja.com/Desktop-Power-Suppl···cts/475/
I assume you are replacing a failed unit so the tip is not all that important. If needed cut off the old one and splice it to the new supply.
/tom |
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AC Adapter failure point | 
How big is this plug? |
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lutful... of ideasPremium
join:2005-06-16
Ottawa, ON Reviews:
·TekSavvy DSL
| This is a common failure - DC cable gets frayed just after the strain relief. You could follow instructions from others who have fixed it.
»www.instructables.com/id/Repair-···ALLSTEPS
DC plug's polarity will be printed somewhere on the label - make sure you don't change it during the fix. |
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| I see where you are going, however, at the end of the day I think replacement is the best option. |
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Reviews:
 ·AT&T U-Verse
| reply to wolfy339
You need a switching supply, not a transformer-based adapter. The voltage output of transformer-based adapters depends on the load, you may very well see 16-17V with a very small load.
Hard drives use 12V and 5V/3.3V, I am willing to bet the enclosure feeds the 12V directly to the drive and derives the 5V or 3.3V from it. You'd be at risk of frying the hard drive if the "12V" is actually 16-17V |
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lutful... of ideasPremium
join:2005-06-16
Ottawa, ON Reviews:
·TekSavvy DSL
| reply to wolfy339
said by wolfy339:I see where you are going, however, at the end of the day I think replacement is the best option. As cowboyro  mentioned, you need a good quality switching power supply that provides "at least" 2A at 12V.
I looked through tschmidt link and see a 12V/5A switching power supply for $17.95. Comes with 4 different DC plugs - one of them will match yours. You can also use it for other 12V gear in the future.
»www.mpja.com/12-Volt-Desktop-Pow···82%20PS/
P.S. There are sub-$10 units at that site but the single DC plug may not match yours and they don't provide AC cord either. |
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| RE-PC has hundreds of power supplies in their stores (Seattle & Southcenter) , and with the exception laptop supplies, I think the majority is priced for about $2 apiece.
You either have to measure the plug (*both* inside & outside), or just cut it off and take it with you for comparison.
As for the electrical specs, I found that included switching supplies are usually overrated (the actual power draw should be around 12W in this case), and when loaded, a transformer based PS should be close enough to the specs. I'd have no problem to plug in a 12V/1A or 1.5A supply. Of course, if you go to shop, then by all means buy a switching supply. |
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b10010011Whats a Posting tag?
join:2004-09-07
Bellingham, WA Reviews:
 ·Comcast Formerl..
1 edit | reply to wolfy339
Goodwill, my local one always has crap loads of AC adapters for 99 cents.
I have to add that Goodwill is always the first place I go when I need and adapter, cord, or cable of any type.
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