AC Adapter Replacement

[b4u]

Hi,

I'm looking for an AC Adapter, and need some help on choosing one that suits my hardware needs.

I've bought an ICYBOX external case, and it came with an AC Adapter.

The Adapter cable started to strip apart where it joins the adapter itself, and so I need a replacement, as it is now very dangerous to connect it to power.

The product is still within warranty time, does the warranty covers this kind of problems? I don't use it very often, I find it strange for the cable to being stripping apart.

If I need to replace, I'll be looking for a general purpose AC Adapter.

The current adapter as the following inscriptions:

CWT AC ADAPTER
MODEL: KPC-024F 24.0W
INPUT: 100-240V~ 50/60Hz 0.8A
OUTPUT: 12.0V --- 2.0A

From this characteristics, which ones should I look for in the new adapter? All of them?

Thanks

 

[Blain]

Output voltage
Output amperage
Tip polarity

"The Adapter cable started to strip apart where it joins the adapter itself"

Post a pic

 

[Modelworks]

Any 12VDC @ 2A or more adapter will work. the ---- line means DC ~ is for AC
You only have to meet those requirements anything more in the amps is fine, get a 4A if you like doesn't matter it will only use what it needs.
http://www.directron.com/dvcpa20a.html?gsear=1
http://cgi.ebay.com/ws/eBayISAPI.dl...bfcf2a6&itemid=170422555348&ff4=263602_263622

It is a common adapter so you can get them just about anywhere.

 

[b4u]

That's something that confuses me.

I've found this entry in another site:
"the adapter only needs to match the current consumption as a minimum."

Does it mean I can get an adapter that outputs 18V --- 6A without burning the equipment?

Well, the symbol is not just ---. It has a continuous line and bellow it has ---, like:

      ___
12.0V --- 2.0A

That's more like it it's not just "---", if it does mean anything ... as you can see, I'm a n00b at this matter.

And has positive polarity:

       ___
      /   \
(+)-----O |---(-)
      \___/

Eh, I'll post a picture latter on, it's simpler than ascii-ing the thing

 

[PottedMeat]

That's something that confuses me.

I've found this entry in another site:
"the adapter only needs to match the current consumption as a minimum."

Does it mean I can get an adapter that outputs 18V --- 6A without burning the equipment?

No, it means you can get any 12V adapter that is rated for at least 2A. So 12V 2.1A is fine or 12V 5A is fine but 12V 1.8A is not.

You also need to make sure the plug on the end has the correct polarity. Sometimes the inner conductor is positive (outer negative), sometimes inner negative (outer positive). Match it to the original adapter.

 

[b4u]

Ok, so another basic question:

Current (amp) is the flow, and Voltage (V) is the amount of power available.

If I provide the same voltage, I can give a bigger current, as the equipment will get what it needs. So it's as if the current strangles the voltage to get the desired power.

So why can't I provide a bigger voltage, with a lower current? For example, the equipment needs 12V-2amp, so why can't I provide a 24V-1amp? (this seems stupid question as I type )

 

[Blain]

So it's as if the current strangles the voltage to get the desired power.

So why can't I provide a bigger voltage, with a lower current? For example, the equipment needs 12V-2amp, so why can't I provide a 24V-1amp? (this seems stupid question as I type )

You can supply it with 24v, 48v or 120v for that matter.
The only problem is that your device will burn out.
In that case, the extra voltage would "strangle" your device. D:

 

[b4u]

Uhm ... I won't try it

So if:

P=VI

In a PSU of 750W, is it safe to assume it will have 750=220*I -> I=3.40amp ?
(I'm in Europe, with 220V power on my wall sockets)

Is that it? Or I'm missing it completely? I'm missing it, because from Corsair HX750W Features:

Corsair HX750W Features:

* Guaranteed to sustain its full rated wattage at an ambient temperature of 50°C
* Up to 90% energy-efficiency under real-world load conditions*
* Single +12V rail design providing up to 62A
* Multi-GPU ready
* 105°C solid-state capacitors
* Active Power Factor Correction (PFC) with PF value of 0.99
* Supports ATX12V 2.3 and EPS12V 2.91 standards. Backwards compatible with ATX12V 2.01
* Auto switching circuitry for universal AC input from 90-264V
* Over Current/Voltage/Power Protection, Under Voltage Protection and Short Circuit Protection provide complete component safety
* Dimensions: 150mm(W) x 86mm(H) x 180mm(L)
* MTBF: 100,000 hours
* Safety Approvals: UL, CUL, CE, CB, FCC Class B, TÜV, CCC, C-tick

It seams it can achieve 62amp. Or something like that.

Edit:
Uhm ... found that P=V*I, 750w=12V*62A ... so 750W is maximum, and the 62A are splinted across all power connections to mobo, disks, etc. ... ?


Thanks for your patience.

 

[b4u]

So here I am, reviving this thread, for a reason

I'm found a power adapter with exact same specs ... except it has a thinner inner barrel on the "jack" connector that goes into the electric device.

I believe it's a 5.5mm external barrel and a 2.1mm internal, but the original was 2.5mm ... so the question is, is there any adapters around?

I found something online, but I'm interested in buying for Western Europe, and 1 unit ... the place I find sells at least 50 units ... :S it would be cheaper to buy a new electrical appliance just for the power adapter.

Example of what I found: http://www.pacificcable.com/Picture_Page.asp?DataName=DCA-52125J


Thanks.

 

[corkyg]

Go here and see if you can find the adapter tip needed for your equipment:

http://www.laptopshop.co.uk/laptop-notebook-ac-adapter/tip-packs.htm

 

[lxskllr]

You never did post a picture of the old adapter. Can you cut the cable, and splice the old tip on the new wire?

 

[b4u]

You never did post a picture of the old adapter. Can you cut the cable, and splice the old tip on the new wire?

Yep, you're right, I was missing the picture:

http://img265.imageshack.us/i/poweradapter.jpg/

Small Update: The cable is now completely separated from the adapter itself ... it was calling for it ... :\

It is not easy to reconnect the wire, I would have to open the adapter itself, which has no screws at all ... damn factory builds! It is completely sealed, and I would have to "break it" in some way ... I prefer not to, because ...

... I've found a power adapter with the exact specs!!! Yes! I just found it ... really, in one of those boxes, in an IT department, where people throw in all kinds of electronic garbage ... I saw some power adapters, I looked into them ... and there it was!!!!

It's exactly what I need, except ... it is a 2.1mm tip, and I need a 2.5mm ... so I splashed around 3€ on buying 2 jacks and now I just have to assemble the custom made tip adapter ... or buy one, if I find a better alternative.

I'll post a pic of the new adapter, before connecting it , so I you guys can confirm the compatibility with me

 

[lxskllr]

Yep, you're right, I was missing the picture:

Pic Clipped

Small Update: The cable is now completely separated from the adapter itself ... it was calling for it ... :\

It is not easy to reconnect the wire, I would have to open the adapter itself, which has no screws at all ... damn factory builds! It is completely sealed, and I would have to "break it" in some way ... I prefer not to, because ...

... I've found a power adapter with the exact specs!!! Yes! I just found it ... really, in one of those boxes, in an IT department, where people throw in all kinds of electronic garbage ... I saw some power adapters, I looked into them ... and there it was!!!!

It's exactly what I need, except ... it is a 2.1mm tip, and I need a 2.5mm ... so I splashed around 3€ on buying 2 jacks and now I just have to assemble the custom made tip adapter ... or buy one, if I find a better alternative.

I'll post a pic of the new adapter, before connecting it , so I you guys can confirm the compatibility with me

I'd take the jacks you bought back, and put your old tip on the new wire. All you need's a bit of electric tape, or if you're an overachiever, a solder iron and electric tape :^D

 

[b4u]

I'd take the jacks you bought back, and put your old tip on the new wire. All you need's a bit of electric tape, or if you're an overachiever, a solder iron and electric tape :^D

Ops ... too late for that ...

I've bought some tip adapters from ebay ... 2.1mm to 2.5mm and 2.5mm to 2.1mm.

They arrived, and they look great, and fit well.

Now If I could only be sure the new power adapter I found is compatible ... I think it is, just don't know if it is working, or faulty.

Anyway, from the new power adapter:

I.T.EPOWER SUPPLY
MODEL: HK-B224-A12
PRI.: 100-240V~50/60Hz 0.6A
         ___
SEC.: 12V---0-2.0A(SET AT 2.0A)

       ___
      /   \
(-)---| O-----(+)
      \___/

No way so send picture now, but those are the specs in the power adapter.

I'll post a picture of it and of the adapters I bought. They cost around 4$ with postage, far less than 20$ for a new adapter and another piece of electronics.

So am I safe to use it?

Thanks

 

[lxskllr]

Yea, that's fine. It's an exact match for your old specwise.