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Thinking about getting one of those cheap ebay power supplies?

Posted by DasBasti

DasBasti

Thinking about getting one of those cheap ebay power supplies?
November 08, 2014 02:27PM

Registered: 9 years ago
Posts: 57

I took one apart and had a poke around what is inside of the supply.

The look quite decent for the price. So I would say go for it.

[www.kurzschluss-blog.de]

Edited 1 time(s). Last edit at 11/08/2014 04:48PM by DasBasti.

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dc42

Re: Thinking about getting one of those cheap ebay power supplies?
November 08, 2014 05:28PM

Registered: 10 years ago
Posts: 14,672

Thanks for taking a close look at that PSu! I've been using the 12V 300W version (which is fanless) of a similar power supply to power my printer for the last 6 months, with no apparent problems.

Was the ripple really as much as 1Vpp? It looks a lot less on the scope trace in your blog entry.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

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Dust

Re: Thinking about getting one of those cheap ebay power supplies?
November 08, 2014 10:48PM

Admin
Registered: 13 years ago
Posts: 7,000

If your really lucky you get one that blows up

IMG_1045.JPG

Other fun faults I have seen:

fan upside down...
fan temperature switch replaced with a wire
case so thin most screws have pulled threw. (leaving metal fragments inside the case)

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DasBasti

Re: Thinking about getting one of those cheap ebay power supplies?
November 09, 2014 06:55AM

Registered: 9 years ago
Posts: 57

Quote
dc42
Was the ripple really as much as 1Vpp? It looks a lot less on the scope trace in your blog entry.

You are right, it is more like 0.2Vpp. I just had a look at it again, it is indeed only 0.2Vpp