finding a power cord
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- stuntpenguin007
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I need to find a power cord to replace a 12V 750mAh power cord. If I were to replace the cord with a 12V 2A cord would the thing I'm trying to supply power to get fried?
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- jdmlight
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Re: finding a power cord
Nope, that won't fry it. The voltage needs to match exactly, the current needs to be equal to or greater than the original. Something that needs 750ma will only draw 750ma out of the 2a possible.stuntpenguin007 wrote:I need to find a power cord to replace a 12V 750mAh power cord. If I were to replace the cord with a 12V 2A cord would the thing I'm trying to supply power to get fried?
If you're getting a replacement, make absolutely sure that you match up the polarity correctly. Mixing that up WILL in all likelihood fry something.
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Re: finding a power cord
Unless it'a a rere exception like the NES that takes AC.jdmlight wrote:If you're getting a replacement, make absolutely sure that you match up the polarity correctly. Mixing that up WILL in all likelihood fry something.
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- jdmlight
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Re: finding a power cord
True. (unless you're like me, I lost my original NES power brick a long time ago, now I'm just using some random 12VDC power brick, in which case you do have to have the correct polarity for the 7805 inside )nevermind1534 wrote:Unless it'a a rere exception like the NES that takes AC.jdmlight wrote:If you're getting a replacement, make absolutely sure that you match up the polarity correctly. Mixing that up WILL in all likelihood fry something.
--John (and please call me John, it's really weird to be called by my username)
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Re: finding a power cord
If you are still putting in in the old rectifier, then no you dont
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- jdmlight
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Re: finding a power cord
Forgot about that part. The rectifier would correct the polarity for you. My NES has been in pieces on my bench so long that I forgot about that...timmeh87 wrote:If you are still putting in in the old rectifier, then no you dont
(why on earth did they not use a regular DC power brick on the NES?)
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- stuntpenguin007
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Re: finding a power cord
Thanks. I know how to test the polarity of a power brick with a multimeter, but how do I know what the polarity of the thing I'm trying to power is?
I guess I could crack it open and see where the wires lead. Or if I'm lucky they'll even be color coded.
I guess I could crack it open and see where the wires lead. Or if I'm lucky they'll even be color coded.
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- jdmlight
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Re: finding a power cord
A lot of times there is a little diagram by the power jack, like this:stuntpenguin007 wrote:Thanks. I know how to test the polarity of a power brick with a multimeter, but how do I know what the polarity of the thing I'm trying to power is?
(a random googled image)
If not, you can oftentimes find such info on the internets. What is it you're trying to power?
--John (and please call me John, it's really weird to be called by my username)
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- stuntpenguin007
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Re: finding a power cord
A cd64 for my n64. I'm still waiting on shipping, so I don't have it with me right now to check for power markings.
Thanks for all the help, I hope I get it to work
Thanks for all the help, I hope I get it to work
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- desertman123
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Re: finding a power cord
Amperage on a power brick normally means it can supply up to that many, not that it is giving that much.
750mAh load will take 750mAh, regardless of its a 750mAh brick or 2A brick.
750mAh load will take 750mAh, regardless of its a 750mAh brick or 2A brick.
Word to the wise: DON'T THROW ELECTRONICS AWAY!!!
Re: finding a power cord
UNIT ABUSE ALERT.
mA mA mA mA mA mA mA
mA mA mA mA mA mA mA
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