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correct tip placement switching power supply?

Novakingwai 2,136 259 March 24, 2016 at 09:50 AM More Amazon Deals
i have a power switcher model dvsw--2000. When you choose between the different dc currents it shows Tip and then + or -. I have no idea which way to orient the tip (it has interchangeable tips) and I don't want to test it and destory my machine. Help me

http://www.amazon.com/Nippon-Amer...B00EZB5OTM
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#2
Quote from Novakingwai View Post :
i have a power switcher model dvsw--2000. When you choose between the different dc currents it shows Tip and then + or -. I have no idea which way to orient the tip (it has interchangeable tips) and I don't want to test it and destory my machine. Help me

http://www.amazon.com/Nippon-Amer...B00EZB5OTM
It depends on what you're connecting to the power supply, something you neglected to share. Ideally, you find some kind of indication on the original power supply, the device, or the manual. If there aren't any markings to speak of and you still have the original supply you can test it with a volt meter.

As this board is generally focused on computers, It's worth noting that I don't this the power supply you linked to is likely to be appropriate for any computer.
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#3
Quote from jkee View Post :
It depends on what you're connecting to the power supply, something you neglected to share. Ideally, you find some kind of indication on the original power supply, the device, or the manual. If there aren't any markings to speak of and you still have the original supply you can test it with a volt meter.
Iagree

You should see something like



or



which denote the polarity that the device is expecting. Your power supply may be able to switch the polarity it provides (looking at the bottom of the supply in the images, it looks like it shows both polarities); check the instructions to be sure.

Quote :
As this board is generally focused on computers, It's worth noting that I don't this the power supply you linked to is likely to be appropriate for any computer.
There are plenty of tech support threads not related to computers, so I disagree with the first part of your statement. I agree that the power supply linked is indeed not likely to be for a computer.
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#4
It's not for a computer, its for a security DVR system model DVRC2648ME. The forums stickies have HVAC, home repair, and car audio threads. Tech support doesn't mean computer only.
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#5
Quote from Novakingwai View Post :
It's not for a computer, its for a security DVR system model DVRC2648ME. The forums stickies have HVAC, home repair, and car audio threads. Tech support doesn't mean computer only.
You simply referred to the device you're trying to power as "my machine" an expression more likely to be used in reference to a computer imho.

Info I could find on your DVR is limited, but the spec sheet does say it needs a 4A power supply at 12V. So the power supply you linked to isn't up to the job. You'll probably have to look on the device or original power adapter for a polarity marking.
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#6
Quote from jkee View Post :
You simply referred to the device you're trying to power as "my machine" an expression more likely to be used in reference to a computer imho.

Info I could find on your DVR is limited, but the spec sheet does say it needs a 4A power supply at 12V. So the power supply you linked to isn't up to the job. You'll probably have to look on the device or original power adapter for a polarity marking.
Oh I need 4A?
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#7
Quote from Novakingwai View Post :
Oh I need 4A?
That's what this spec sheet says: http://www2.cop-usa.com/images/pr...CH_web.pdf

fyi 2000mA = 2A, 4000mA = 4A
At that amperage it's less likely it will be adjustable voltage.

Does this DVR use a "Y" type adapter to power the cameras?
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Last edited by jkee March 24, 2016 at 11:51 AM
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#8
Quote from jkee View Post :
That's what this spec sheet says: http://www2.cop-usa.com/images/pr...CH_web.pdf

fyi 2000mA = 2A, 4000mA = 4A
At that amperage it's less likely it will be adjustable voltage.

Does this DVR use a "Y" type adapter to power the cameras?
I don't know my boss constantly gives me shit to fix and I never get the whole story. I can take a picture will that help
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#9
Quote from Novakingwai View Post :
I don't know my boss constantly gives me shit to fix and I never get the whole story. I can take a picture will that help
I'd say a lot of people who are bad a solving problems themselves are also bad at asking for help or explaining the problem to someone else. If I were you I'd probably assume that anything they tell you to do / fix is lacking some important information or is based on some false assumptions. Once you start with that assumption (which you obviously don't share with your boss), hopefully you can ask some better questions of your boss from the start when they give you a task like this and waste a lot less of your time. If they're the sort of person who gets upset the instant you ask a question or question one of their false assumptions, I'd look for a better job.

Some pictures may help, but no guarantees. What happened to the original power supply? Looking at the website for "cop-usa" I'm underwhelmed. They do have a power supplies section under accessories with very sparse details, but you can see what I meant about the "Y" adapter: http://www.cop-usa.com/ebproduct....rderby=-id

You might find something more specific to this model in a more focused forum.

Take a few steps back and try to think about the whole camera system, test different components independently if possible. Newer higher resolution cameras are a big improvement. You can actually see faces with enough detail to be useful. There could also be a lot more wrong with the current system than you think and generally it might well be time for an upgrade.
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Last edited by jkee March 24, 2016 at 02:01 PM
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#10
Generally speaking the exposed lead in these is (-).
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#11
Quote from Dr. J View Post :
Generally speaking the exposed lead in these is (-).
Center positive is certainly the most common configuration for barrel jacks (what you describe), but center negative does show up every now and then. I'd say it's at least 80% center positive.

I like to build things with a full wave rectifier on the input when I can so polarity is irrelevant when I can, but I doubt they did that on this DVR or the cameras.
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