Importance of mA in AC to DC converter?

[dino]

I have a device which requires DC input - 9.0VDC 300mA
I have an AC/DC adapter with output of 9VDC 600mA
Will I damage the device by using this adapter? Or does the device
simply take as many mA as it needs?

 

[Mike S.]

I have a device which requires DC input - 9.0VDC 300mA
I have an AC/DC adapter with output of 9VDC 600mA
Will I damage the device by using this adapter?

Probably not, as long as the plug has the correct polarity.

Or does the device simply take as many mA as it needs?

Usually yes.

 

[dino]

Probably not, as long as the plug has the correct polarity.


Usually yes.

Thanks Mike! Hadn't considered polarity and they are different!!
Guesss I will have to source another adapter.

 

[Michael Black]

I have a device which requires DC input - 9.0VDC 300mA
I have an AC/DC adapter with output of 9VDC 600mA
Will I damage the device by using this adapter? Or does the device
simply take as many mA as it needs?

There is a caveat.

A piece of equipment will draw only as much current as it needs, so
hooking it up to something that supplies more current won't affect it.

But, some or a lot of those AC adaptors are designed for a specific unit
in mind. They will supply the needed voltage at the needed current.
However, if the load is less than specified, the voltage may be
higher than the stated voltage. The adaptor is expecting a certain
load, and will supply the stated voltage at that load, but if the
load is less, the voltage will rise.

Michael

 

[dino]

There is a caveat.

A piece of equipment will draw only as much current as it needs, so
hooking it up to something that supplies more current won't affect it.

But, some or a lot of those AC adaptors are designed for a specific unit
in mind. They will supply the needed voltage at the needed current.
However, if the load is less than specified, the voltage may be
higher than the stated voltage. The adaptor is expecting a certain
load, and will supply the stated voltage at that load, but if the
load is less, the voltage will rise.

Michael

Have contacted device manufacturer and ordered a replacement! At
least that way I will be sure! Thanks again.
Noel.

 

[Doug Miller]

Thanks Mike! Hadn't considered polarity and they are different!!
Guesss I will have to source another adapter.

For production, yes -- but if this is one-of-a-kind, just cut the cable
somewhere in the middle, swap the wires, and re-splice.

 

[Lionel]

I have a device which requires DC input - 9.0VDC 300mA
I have an AC/DC adapter with output of 9VDC 600mA
Will I damage the device by using this adapter? Or does the device
simply take as many mA as it needs?

You will do *SERIOUS* damage to the device by using that adapter.

HTH.


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[Lionel]

On Thu, 31 May 2007 19:34:53 -0700, John Larkin
<[email protected]> boggled at how lame the

On Fri, 01 Jun 2007 02:21:14 +0000, Lionel <[email protected]> ^^^^


How can nonsense help?

It was one of my fans pretending to be me:
<http://linuxmafia.com/~rick/lexicon.html#frogery>
---
Frogery (link)

Yet another new and fabulous Internet invention, a "frogery"
(alternatively, "froggery") is a forged Usenet posting (or, by
extension, e-mail or Web site) whose address was crafted to be
visually as indistinguishable as possible from that of its intended
victim — substituting, e.g., "1" for "l" or "0" for "O" — to either
slur the victim by association or troll him into complaining to the
froger's Internet provider or a public forum, and thereby look stupid.

The term originated on the Usenet newsgroup
news.admin.net-abuse.usenet in the late 1990s. The best known frogery
episode was occasioned by an obscene January 13, 1997 soc.culture.thai
post from "Lawrence Godfrey", leading the better-known Dr. Laurence
Godfrey (whose e-mail address was used in the frogery) to file a
defamation action against Demon Internet Ltd. for failing to remove it
from the company's news spool when so requested.
---

--
\___ Proud Cog #1 in the AUK Hate Machine
_(AUK)====:: Do *you* think that you have the Right Stuff?
/='='='='-, Apply TODAY by addressing a gratuitously cruel
(O+O+O+O+O) flame to: "Uncle Fester", C/O soc.singles & AUK.
~^^^^^^^^^~~~^~^^~'~~^'^~~~"~~'"~^~'"~~^~"~'~^'^~^~^^~^~"~^~"'~'"~^~~

 

[Palindrome]

dino wrote:




You will do *SERIOUS* damage to the device by using that adapter.

Yep. Except substitute *could* for *will*.

Unregulated ac/dc adapters can have an output far above the nominal
voltage when not on full load. It may not matter - the device may be
able to cope with the higher voltage. So the OP needs to give more
details on what device and what adapter.

If it is a regulated adapter, it will probably be fine. I say probably
as there could be reasons why a specific adapter has to be used - eg
safety critical devices or telecommunication devices which are only
approved when used with a specific adapter.

 

[Lionel]

On Fri, 01 Jun 2007 02:21:14 +0000, Lionel <[email protected]>

Path: blackhelicopter.databasix.com!news.glorb.com!border1.nntp.dca.giganews.com!nntp.giganews.com!nx02.iad01.newshosting.com!newshosting.com!post01.iad01!not-for-mail
From: Lionel <[email protected]>

^^^^
**** off, identity thief.

[...]

You will do *SERIOUS* damage to the device by using that adapter.

HTH.

--
\___ Proud Cog #1 in the AUK Hate Machine
_(AUK)====:: Do *you* think that you have the Right Stuff?
/='='='='-, Apply TODAY by addressing a gratuitously cruel
(O+O+O+O+O) flame to: "Uncle Fester", C/O soc.singles & AUK.
~^^^^^^^^^~~~^~^^~'~~^'^~~~"~~'"~^~'"~~^~"~'~^'^~^~^^~^~"~^~"'~'"~^~~

 

[blu]

How can nonsense help?

It makes ya smile when all else fails.
< smile >
Howzit going, John?
I hope life's treating you well.

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