Longer XO transformer power cord in the plans?

Gary C Martin gary at garycmartin.com
Mon Jun 1 12:06:10 EDT 2009


On 31 May 2009, at 15:34, Reinder de Haan wrote:
> Tiago Marques wrote:
>> On 5/31/09, Reinder de Haan <rs at mveas.com> wrote:
>>>
>>> Sascha Silbe wrote:
>>>> On Sun, May 31, 2009 at 03:16:53PM +1000, James Cameron wrote:
>>>>
>>>>> 1.  Earthing.  The current design has no earth at the AC end,  
>>>>> and is
>>>>> isolated in relation to the DC end.  An earthed AC plug in some
>>>>> countries produces a more reliable and positive insertion and  
>>>>> anchoring.
>>>> All "travel adapters" (power outlet adapters) I've come across so  
>>>> far
>>>> had no earthing so would be impossible to use (unaltered). Of  
>>>> course
>>>> this wouldn't be much of a change as the current wall warts also  
>>>> don't
>>>> fit any adapter I've seen at shops. At SugarCamp in Paris, quite  
>>>> a few
>>>> people (including myself) had "custom" ones, i.e. with mechanic
>>>> alterations.
>>>> Personally, I feel comfortable making minor mechanic changes to an
>>>> adapter, but I won't usually dare using a non-earthing adapter  
>>>> with a
>>>> device having an earthed plug (unless I know for sure this is  
>>>> safe).
>>>>
>>>> Actually, if you are able to use a standard plug (e.g. IEC-60320- 
>>>> C5/C6)
>>>> at the power supply end, above won't apply at all as it's usually  
>>>> easy
>>>> to get a matching cable, no travel adapter needed. :)
>>> +1 for inline adaptor its MUCH easier to exchange only the mains  
>>> cable:
>>> 1) when its demaged
>>> 2) when shiping to a different part of the world
>>> you would need only one powersupply brick for (almost?) all or the  
>>> world.
>>> i have seen some companies ship a couple of different cables so the
>>> device is usable almost everywhere and doesn't need to be custom
>>> packed/country.
>>>
>>> i would go which IEC-60320 C8/C9 which is used for half of the  
>>> laptops
>>> today.
>>
>> Completely not the picture around this part of Europe. Most of them
>> come with C13 and some are being sold with C7, which is pretty much a
>
> oops i meant C7/C8 NOT C9!!

This map appeared in my feeds today, a nice illustration of world  
usage (don't know how accurate it is, but seems good from what I know  
of):

	http://www.eurocom.com/support/images/plug_map.jpg

Regards,
--Gary

>> standard for other types electronics. C13 would be my favorite, if  
>> the
>> size of the plug is not an issue, since it is also the standard for
>> computer power supplies. As mentioned above, C5 would also be sweet.
>
> both are an earthed connector and so 'require' an earthed outlet.
> combined with that almost all power supplies i have seen with a C5/ 
> C6 or
> C13/C14 connect the earth input to the ground/0V dc output...
> if you insert such power supply into an not earthed outlet (which are
> quite common)
> your whole laptop will be at ~1/2*Uin Vac due to the filter capacitors
> in the mains filter.
> which gives a nasty shock if you touch both a non insulated part of  
> your
> laptop and a earthed object..
>
>
>> As for safety, adding something like the cable plug of the original
>> Xbox pads would work perfectly and it's not as expensive as Apple's
>> magnetic plug. Cost of this is something I have no clue about.
>>
>> Best regards,
>>
>> Tiago Marques
>>
>>> i feel a earthed design only increases the risks, even more so  
>>> when you
>>> cant depend on the quality of the mains supply.
>>> the only advantage to the earthed design that im aware of is that  
>>> the
>>> power supply easier(cheaper?) meets EMC/FCC regulations.
>>>
>>>> I hope future XO versions will still have the same broad power  
>>>> input
>>>> specs as the XO-1. It's been very useful already (e.g. cable-only  
>>>> "car
>>>> adapter", no voltage conversion or even voltage limit necessary).
>>>>
>>>> CU Sascha
>>>>
>>>>
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