MP3 player power adapter question help pls!

Hi...

Before encouraging any experimentation, you have to fill in one more blank :)

Are you looking for an AC or DC adapter, and what are the adapters that you've found?

Take care.

Ken

I've never heard of an adapter rated in maH -- do you mean mA ?

In addition to the other poster's question about AC vs DC, you need to be concerned about polarity -- positive or negative on the center conductor.

BTW, 1.5 A = 1500 mA .

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CJT wrote in news: snipped-for-privacy@prodigy.net:

ok sorry bout that, yeah DC connector I didnt know mp3 players used AC power and I didnt hear of maH before either but for some reason they have an extra H at the end. Iam pretty sure they mean mA

yeah 1500mA = three times the required on the mp3 player! 0_0 thanks again for your fast responce

Pred wrote in news:Xns9899CA75A1711poopshootcom@

199.185.223.74:

But that's just the point, you see. Some power adapters put out ac, some dc. Does your mp3 player say it needs dc?

And some dc power adapters have a positive middle conductor, and some have a negative. Which does your mp3 player need?

It's best to get these answers straight before you turn the power on...

Then I think you'd have the best chance of success with the 5v 1.5a adapter.

sorry I dont know what information you needed to know, so far thats all Ive seen people worry about ( voltage and amps ). The mp3 player needs DC and the adapters are also DC. I have no idea what the middle conductor is tho... I was kind of leaning towards the 1.5 amp one aswell. Hope that answers something.

Usually there's a little circle with either a + or - in the middle.

If the one on the power adapter matches the one on the MP3 player, you're golden.

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BUT BEFORE PLUGGING IN ...

Please check the output voltage with a good meter. The supplies you have may not be regulated, in which case, the voltage that they output under no load could be anything up to TWICE what the plate on them says. An MP3 player will draw so little current - probably only a couple hundred mA, despite the specs calling for a 500mA supply - that it will not load down an unregulated supply, particularly one rated at 1.5 amps, anything like as much as would be needed to get it down to its shown 5v.

So, before choosing and using one of your junk box supplies, check that the polarity matches, as already pointed out by another poster, AND that the output voltages really are 4.5v and 5v.

Arfa

Batteries are rated in amp/hours. The maH would be milliamp/Hours. If it didn't have batteries in it you could hook it up to a 10amp supply but since it does you need to limit how much current is supplied to the batteries. Otherwise you'll have big problems. Theoretically fully discharged 1200ma batteries would take just over 2hrs to charge at 500maH. My MP3 player uses

2 AA NIHM batteries and has a 12v to 4.5v 600ma supply. I'd try what you have once you have the correct polarity.