100v--> 10V Trans. on 120V

  • Thread starter Michael Kennedy
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Michael Kennedy

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I was wonderin if someone could educate me on Transformers.
Here I have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer.
Am Im I correct in guessing that this transformer is going to output 12V on
120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see what the
voltage is.


TIA

Mike
 
On Dec 3, 10:17 am, "Michael Kennedy" <m...@nospam.com> wrote:
I was wonderin if someone could educate me on Transformers.
Here I have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer.
Am Im I correct in guessing that this transformer is going to output 12V on
120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see what the
voltage is.

TIA

Mike
Click to expand...
Yes, BUT.
Iron transformers are designed with only sufficient turns on the
primary to prevent the core beginning to saturate at the highest
expected voltate [~+10% or so] so if you try and run a transformer
designed for 100V nominal on 120V nominal the core will likely be
running into the saturation curve. This can give three effects: the
primary current draw will be excessive causing the wire to overheat,
the core running into saturation will overheat and finally, the output
waveform may be clipped causing a reduced output voltage compared to
what would be expected from the turns ratio. However, that transformer
may be specified for the Japanese 50Hz power in which case there will
be some extra margin so it could operate okay on 120V 60Hz [100V *
60/50Hz]
In other words, it is okay to run a transformer on lower primary
voltage than specified but not higher and it is okay to run a
transformer on a higher frequency than specified but not lower
[assuming typical power line frequencies 25-60Hz].

Neil S.
 
"nesesu"

Iron transformers are designed with only sufficient turns on the
primary to prevent the core beginning to saturate at the highest
expected voltate [~+10% or so]

** Only true for toroidal an C-core types - it is common practice to
allow the core of an E-core type to operate into some or even a lot of
saturation. The practice is almost universal with small PSUs containing
E-cores.


so if you try and run a transformer
designed for 100V nominal on 120V nominal the core will likely be
running into the saturation curve.

** See above.


This can give three effects: the
primary current draw will be excessive causing the wire to overheat,
the core running into saturation will overheat

** The operative word is "can" - chances are that the unit will tolerate
the increase.


and finally, the output
waveform may be clipped causing a reduced output voltage compared to
what would be expected from the turns ratio.


** Fraid you have gone right off the rails here.

Core saturation does NOT cause waveform clipping - for the simple reason
that the current draw increases only around the times of zero voltage on the
AC wave.



However, that transformer
may be specified for the Japanese 50Hz power in which case there will
be some extra margin so it could operate okay on 120V 60Hz [100V *
60/50Hz]


** Correct - almost all Japanese ( local market ) power transformers are
built for 100 volt AC @ 50 Hz operation.

About half the country has 50Hz power.


..... Phil
 
On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I have
a Japanese Nintendo which has a 100V to 10V wall wart iorn transformer.
Am Im I correct in guessing that this transformer is going to output 12V
on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see what
the voltage is.


TIA

Mike
Click to expand...
If the supply is rectified and well regulated it will output 10vdc or
there abouts.



--
Live Fast, Die Young and Leave a Pretty Corpse
 
On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I have
a Japanese Nintendo which has a 100V to 10V wall wart iorn transformer.
Am Im I correct in guessing that this transformer is going to output 12V
on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see what

If the supply is rectified and well regulated it will output 10vdc or
there abouts.
Click to expand...
How do you get DC out of a transformer? Must be a really special one ...

Of course, it's impossible to tell from the O.P. whether the thing in
question is really a transformer (outputs AC) or a power supply (outputs
DC).

To the OP, it would help us to know. What does it say on the wall wart?
Should say something like "10 VAC" or "10 VDC" or some such.


--
The fashion in killing has an insouciant, flirty style this spring,
with the flaunting of well-defined muscle, wrapped in flags.

- Comment from an article on Antiwar.com (http://antiwar.com)
 
On 12/3/2010 8:35 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 16:20:17 -0800, David Nebenzahl wrote:

On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I
have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer. Am Im I correct in guessing that this transformer is
going to output 12V on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see what

If the supply is rectified and well regulated it will output 10vdc or
there abouts.

How[SLAP]

Fuck off you pisswit. Note the "If" word, Revenge Dweeb.
Click to expand...
Fuck off yourself, Meat Head.


--
How To Access Wikileaks

These sites are still up as of 12/3/10:

http://wikileaks.de
http://wikileaks.fi
http://wikileaks.nl
http://wikileaks.eu
http://wikileaks.pl

And these IP addresses can be used:

http://213.251.145.96/
http://88.80.13.160/
 
On 12/3/2010 9:03 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 20:41:26 -0800, David Nebenzahl wrote:

On 12/3/2010 8:35 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 16:20:17 -0800, David Nebenzahl wrote:

On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I
have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer. Am Im I correct in guessing that this transformer is
going to output 12V on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see
what

If the supply is rectified and well regulated it will output 10vdc or
there abouts.

How[SLAP]

Fuck off you pisswit. Note the "If" word, Revenge Dweeb.

Fuck off yourself, Meat Head.

Love it when I back up trolls like you into a corner.
Click to expand...
What you perceive as some kind of "victory" is just your twisted
masturbatory fantasies, Meat Head ...


--
How To Access Wikileaks

These sites are still up as of 12/3/10:

http://wikileaks.de
http://wikileaks.fi
http://wikileaks.nl
http://wikileaks.eu
http://wikileaks.pl

And these IP addresses can be used:

http://213.251.145.96/
http://88.80.13.160/
 
On Fri, 03 Dec 2010 16:20:17 -0800, David Nebenzahl wrote:

On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I
have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer. Am Im I correct in guessing that this transformer is
going to output 12V on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see what

If the supply is rectified and well regulated it will output 10vdc or
there abouts.

How[SLAP]
Click to expand...
Fuck off you pisswit. Note the "If" word, Revenge Dweeb.



--
Live Fast, Die Young and Leave a Pretty Corpse
 
On Fri, 03 Dec 2010 20:41:26 -0800, David Nebenzahl wrote:

On 12/3/2010 8:35 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 16:20:17 -0800, David Nebenzahl wrote:

On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I
have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer. Am Im I correct in guessing that this transformer is
going to output 12V on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see
what

If the supply is rectified and well regulated it will output 10vdc or
there abouts.

How[SLAP]

Fuck off you pisswit. Note the "If" word, Revenge Dweeb.

Fuck off yourself, Meat Head.
Click to expand...
Love it when I back up trolls like you into a corner.



--
Live Fast, Die Young and Leave a Pretty Corpse
 
Having a DC output from a transformer is obviously more common that you
think.

The old style automotive ignition coil (autotransformer) outputs HV DC.

That's one example, and it is a transformer although not the kind used for a
game system power source, and the output isn't rectified.

--
Cheers,
WB
..............


"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cf988fd$0$2409$822641b3@news.adtechcomputers.com...
How do you get DC out of a transformer? Must be a really special one ...

Of course, it's impossible to tell from the O.P. whether the thing in
question is really a transformer (outputs AC) or a power supply (outputs
DC).

To the OP, it would help us to know. What does it say on the wall wart?
Should say something like "10 VAC" or "10 VDC" or some such.
Click to expand...
 
On 12/3/2010 10:30 PM Wild_Bill spake thus:

Having a DC output from a transformer is obviously more common that you
think.

The old style automotive ignition coil (autotransformer) outputs HV DC.

That's one example, and it is a transformer although not the kind used for a
game system power source, and the output isn't rectified.
Click to expand...
OK, you win.

On a technicality.


--
How To Access Wikileaks

These sites are still up as of 12/3/10:

http://wikileaks.de
http://wikileaks.fi
http://wikileaks.nl
http://wikileaks.eu
http://wikileaks.pl

And these IP addresses can be used:

http://213.251.145.96/
http://88.80.13.160/
 
"Wild_Bill" wrote in message
news:IdlKo.442218$pX3.215194@en-nntp-11.dc1.easynews.com...

Having a DC output from a transformer is obviously more common that you
think.

The old style automotive ignition coil (autotransformer) outputs HV DC.

That's one example, and it is a transformer although not the kind used for a
game system power source, and the output isn't rectified.

-----------------------------------------------------------------------------------------------------------------------------------

Technically, the input of those coils is AC (pulsating DC, more like square
waves than sine waves, but still AC). The output is DC because it only
outputs on the down cycle of the input (as a result of the collapsing
magnetic field). Even still, the output has some AC characteristics, such as
the slow decay time as opposed to the fast rise time as the current is
applied to the primary. The capacitor across the points helps slow the decay
even further, keeping the voltage peak higher, longer.
 
"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:IdlKo.442218$pX3.215194@en-nntp-11.dc1.easynews.com...
Having a DC output from a transformer is obviously more common that you
think.

The old style automotive ignition coil (autotransformer) outputs HV DC.

That's one example, and it is a transformer although not the kind used for
a game system power source, and the output isn't rectified.

--
Cheers,
WB
.............


"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cf988fd$0$2409$822641b3@news.adtechcomputers.com...

How do you get DC out of a transformer? Must be a really special one ...

Of course, it's impossible to tell from the O.P. whether the thing in
question is really a transformer (outputs AC) or a power supply (outputs
DC).

To the OP, it would help us to know. What does it say on the wall wart?
Should say something like "10 VAC" or "10 VDC" or some such.
Click to expand...

Lot's of "wall-warts" have a rectifier diode and capacitor in the same
little box. More and more they actually have little switching regulators in
there. Those are more efficient and can supply much more current, but they
usually don't last much more than about 15 months because they use such
crappy little capacitors in them, and they are virtually unserviceable.

Mark Z.
 
On 12/4/2010 5:04 AM Mark Zacharias spake thus:

"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:IdlKo.442218$pX3.215194@en-nntp-11.dc1.easynews.com...

Having a DC output from a transformer is obviously more common that
you think.

The old style automotive ignition coil (autotransformer) outputs HV
DC.

That's one example, and it is a transformer although not the kind
used for a game system power source, and the output isn't
rectified.

"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cf988fd$0$2409$822641b3@news.adtechcomputers.com...

How do you get DC out of a transformer? Must be a really special
one ...

Of course, it's impossible to tell from the O.P. whether the
thing in question is really a transformer (outputs AC) or a power
supply (outputs DC).

To the OP, it would help us to know. What does it say on the wall
wart? Should say something like "10 VAC" or "10 VDC" or some
such.

Lot's of "wall-warts" have a rectifier diode and capacitor in the same
little box. More and more they actually have little switching regulators in
there. Those are more efficient and can supply much more current, but they
usually don't last much more than about 15 months because they use such
crappy little capacitors in them, and they are virtually unserviceable.
Click to expand...
Yes, we know that. My point is that a lot of wall warts are just what
the O.P. called them--transformers--and that we really have no idea what
his is, based on what he posted.

More informations, please.


--
How To Access Wikileaks

These sites are still up as of 12/3/10:

http://wikileaks.de
http://wikileaks.fi
http://wikileaks.nl
http://wikileaks.eu
http://wikileaks.pl

And these IP addresses can be used:

http://213.251.145.96/
http://88.80.13.160/
 
"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cf988fd$0$2409$822641b3@news.adtechcomputers.com...
On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I have
a Japanese Nintendo which has a 100V to 10V wall wart iorn transformer.
Am Im I correct in guessing that this transformer is going to output 12V
on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see what

If the supply is rectified and well regulated it will output 10vdc or
there abouts.

How do you get DC out of a transformer? Must be a really special one ...

Of course, it's impossible to tell from the O.P. whether the thing in
question is really a transformer (outputs AC) or a power supply (outputs
DC).

To the OP, it would help us to know. What does it say on the wall wart?
Should say something like "10 VAC" or "10 VDC" or some such.
Click to expand...
DC 10V, although I doubt there is much inside of this thing when it comes to
electronics aside from a couple of diodes or a full wave bridge.
 
"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cfa8cbb$0$2411$822641b3@news.adtechcomputers.com...
On 12/4/2010 5:04 AM Mark Zacharias spake thus:

"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:IdlKo.442218$pX3.215194@en-nntp-11.dc1.easynews.com...

Having a DC output from a transformer is obviously more common that
you think.

The old style automotive ignition coil (autotransformer) outputs HV
DC.

That's one example, and it is a transformer although not the kind
used for a game system power source, and the output isn't
rectified.

"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cf988fd$0$2409$822641b3@news.adtechcomputers.com...

How do you get DC out of a transformer? Must be a really special
one ...

Of course, it's impossible to tell from the O.P. whether the
thing in question is really a transformer (outputs AC) or a power
supply (outputs DC).

To the OP, it would help us to know. What does it say on the wall
wart? Should say something like "10 VAC" or "10 VDC" or some
such.

Lot's of "wall-warts" have a rectifier diode and capacitor in the same
little box. More and more they actually have little switching regulators
in there. Those are more efficient and can supply much more current, but
they usually don't last much more than about 15 months because they use
such crappy little capacitors in them, and they are virtually
unserviceable.

Yes, we know that. My point is that a lot of wall warts are just what the
O.P. called them--transformers--and that we really have no idea what his
is, based on what he posted.

More informations, please.
Click to expand...
Quote: Michael Kennedy
Here I have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer.
Click to expand...

/quote


Sorry I somehow forgot to write core a between iorn and transformer.
It is a 10vdc Iorn core transformer wall wart 50/60Hz 850mA. Not a switcher.
Most likely it has 4 diodes a fuse and possibly a small cap insde of it
along side the transformer. The regulation is inside of the nintendo itself.
 
On 12/4/2010 12:04 PM Michael Kennedy spake thus:

"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cfa8cbb$0$2411$822641b3@news.adtechcomputers.com...

On 12/4/2010 5:04 AM Mark Zacharias spake thus:

"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:IdlKo.442218$pX3.215194@en-nntp-11.dc1.easynews.com...

Having a DC output from a transformer is obviously more common
that you think.

The old style automotive ignition coil (autotransformer)
outputs HV DC.

That's one example, and it is a transformer although not the
kind used for a game system power source, and the output isn't
rectified.

"David Nebenzahl" <nobody@but.us.chickens> wrote in message
news:4cf988fd$0$2409$822641b3@news.adtechcomputers.com...

How do you get DC out of a transformer? Must be a really
special one ...

Of course, it's impossible to tell from the O.P. whether the
thing in question is really a transformer (outputs AC) or a
power supply (outputs DC).

To the OP, it would help us to know. What does it say on the
wall wart? Should say something like "10 VAC" or "10 VDC" or
some such.

Lot's of "wall-warts" have a rectifier diode and capacitor in the
same little box. More and more they actually have little
switching regulators in there. Those are more efficient and can
supply much more current, but they usually don't last much more
than about 15 months because they use such crappy little
capacitors in them, and they are virtually unserviceable.

Yes, we know that. My point is that a lot of wall warts are just
what the O.P. called them--transformers--and that we really have no
idea what his is, based on what he posted.

More informations, please.

Quote: Michael Kennedy
Here I have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer.

/quote

Sorry I somehow forgot to write core a between iorn and transformer.
It is a 10vdc Iorn core transformer wall wart 50/60Hz 850mA. Not a switcher.
Most likely it has 4 diodes a fuse and possibly a small cap insde of it
along side the transformer. The regulation is inside of the nintendo itself.
Click to expand...
You don't understand.

No biggie; apparently you're a newbie. That's OK.

A transformer (and *all* transformers that operate on line
frequency--50/60 Hz--are iron-core, so no need to specify that) converts
AC to AC.

If the wall wart contains diodes, then it's not just a transformer; it's
a DC power supply. (A transformer is part of it.)

So apparently what you have is a DC power supply, judging from the "10
vdc" above.


--
How To Access Wikileaks

These sites are still up as of 12/3/10:

http://wikileaks.de
http://wikileaks.fi
http://wikileaks.nl
http://wikileaks.eu
http://wikileaks.pl

And these IP addresses can be used:

http://213.251.145.96/
http://88.80.13.160/
 
On Fri, 03 Dec 2010 21:07:54 -0800, David Nebenzahl wrote:

On 12/3/2010 9:03 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 20:41:26 -0800, David Nebenzahl wrote:

On 12/3/2010 8:35 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 16:20:17 -0800, David Nebenzahl wrote:

On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I
have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer. Am Im I correct in guessing that this transformer is
going to output 12V on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see
what

If the supply is rectified and well regulated it will output 10vdc
or there abouts.

How[SLAP]

Fuck off you pisswit. Note the "If" word, Revenge Dweeb.

Fuck off yourself, Meat Head.

Love it when I back up trolls like you into a corner.

What you perceive
Click to expand...
What I perceive is an idiot troll (you) backed into a corner.



--
Live Fast, Die Young and Leave a Pretty Corpse
 
On 12/4/2010 3:02 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 21:07:54 -0800, David Nebenzahl wrote:

On 12/3/2010 9:03 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 20:41:26 -0800, David Nebenzahl wrote:

On 12/3/2010 8:35 PM Meat Plow spake thus:

On Fri, 03 Dec 2010 16:20:17 -0800, David Nebenzahl wrote:

On 12/3/2010 1:08 PM Meat Plow spake thus:

On Sat, 04 Dec 2010 03:17:59 +0900, Michael Kennedy wrote:

I was wonderin if someone could educate me on Transformers. Here I
have a Japanese Nintendo which has a 100V to 10V wall wart iorn
transformer. Am Im I correct in guessing that this transformer is
going to output 12V on 120V power instead of 10V it would on 100V?

Not being in the USA at the moment I can't just check it and see
what

If the supply is rectified and well regulated it will output 10vdc
or there abouts.

How[SLAP]

Fuck off you pisswit. Note the "If" word, Revenge Dweeb.

Fuck off yourself, Meat Head.

Love it when I back up trolls like you into a corner.

What you perceive

What I perceive is an idiot troll (you) backed into a corner.
Click to expand...
What I perceive is an unpleasant, belligerent and ill-mannered cur who
has a curious obsession with me ... get over it.


--
How To Access Wikileaks

These sites are still up as of 12/3/10:

http://wikileaks.de
http://wikileaks.fi
http://wikileaks.nl
http://wikileaks.eu
http://wikileaks.pl

And these IP addresses can be used:

http://213.251.145.96/
http://88.80.13.160/
 
On Sat, 04 Dec 2010 07:04:38 -0600, Mark Zacharias wrote:

Lot's of "wall-warts" have a rectifier diode and capacitor in the same
little box. More and more they actually have little switching regulators
in there. Those are more efficient and can supply much more current, but
they usually don't last much more than about 15 months because they use
such crappy little capacitors in them, and they are virtually
unserviceable.

Mark Z.
Click to expand...
I've heard plenty of people refer to a wall wart as a transformer. The OP
gave no other specs than 10 volts. My reply was "if" it was rectified and
regulated the output should be around 10 volts with 120 in.

In Dave Nebenzahl's attempt to insult/discredit my reply his haste
caused a fail to notice or credit my word "if". It's a hurried cheap shot
and I would expect nothing less from someone whose experience, knowledge
and talents fall woefully short of mine.



--
Live Fast, Die Young and Leave a Pretty Corpse
 
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