On Sun, May 31, 2009 at 3:34 PM, Reinder de Haan <span dir="ltr"><<a href="mailto:rs@mveas.com">rs@mveas.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div class="h5"><br>
Tiago Marques wrote:<br>
> On 5/31/09, Reinder de Haan <<a href="mailto:rs@mveas.com">rs@mveas.com</a>> wrote:<br>
>><br>
>> Sascha Silbe wrote:<br>
>>> On Sun, May 31, 2009 at 03:16:53PM +1000, James Cameron wrote:<br>
>>><br>
>>>> 1. Earthing. The current design has no earth at the AC end, and is<br>
>>>> isolated in relation to the DC end. An earthed AC plug in some<br>
>>>> countries produces a more reliable and positive insertion and anchoring.<br>
>>> All "travel adapters" (power outlet adapters) I've come across so far<br>
>>> had no earthing so would be impossible to use (unaltered). Of course<br>
>>> this wouldn't be much of a change as the current wall warts also don't<br>
>>> fit any adapter I've seen at shops. At SugarCamp in Paris, quite a few<br>
>>> people (including myself) had "custom" ones, i.e. with mechanic<br>
>>> alterations.<br>
>>> Personally, I feel comfortable making minor mechanic changes to an<br>
>>> adapter, but I won't usually dare using a non-earthing adapter with a<br>
>>> device having an earthed plug (unless I know for sure this is safe).<br>
>>><br>
>>> Actually, if you are able to use a standard plug (e.g. IEC-60320-C5/C6)<br>
>>> at the power supply end, above won't apply at all as it's usually easy<br>
>>> to get a matching cable, no travel adapter needed. :)<br>
>> +1 for inline adaptor its MUCH easier to exchange only the mains cable:<br>
>> 1) when its demaged<br>
>> 2) when shiping to a different part of the world<br>
>> you would need only one powersupply brick for (almost?) all or the world.<br>
>> i have seen some companies ship a couple of different cables so the<br>
>> device is usable almost everywhere and doesn't need to be custom<br>
>> packed/country.<br>
>><br>
>> i would go which IEC-60320 C8/C9 which is used for half of the laptops<br>
>> today.<br>
><br>
> Completely not the picture around this part of Europe. Most of them<br>
> come with C13 and some are being sold with C7, which is pretty much a<br>
<br>
</div></div>oops i meant C7/C8 NOT C9!!<br>
<div class="im"><br>
> standard for other types electronics. C13 would be my favorite, if the<br>
> size of the plug is not an issue, since it is also the standard for<br>
> computer power supplies. As mentioned above, C5 would also be sweet.<br>
<br>
</div>both are an earthed connector and so 'require' an earthed outlet.<br>
combined with that almost all power supplies i have seen with a C5/C6 or<br>
C13/C14 connect the earth input to the ground/0V dc output...<br>
if you insert such power supply into an not earthed outlet (which are<br>
quite common)<br>
your whole laptop will be at ~1/2*Uin Vac due to the filter capacitors<br>
in the mains filter.<br>
which gives a nasty shock if you touch both a non insulated part of your<br>
laptop and a earthed object..<br>
<div><div class="h5"></div></div></blockquote><div></div><div>Sadly true, but a redisign of the XO power supply wouldn't take the earthing into account, right? So no problems for us.</div><div>The power adapter can be design like with the C17 instead, which will also accept the more abundant C13 cables.</div>
<div></div><div>The unpolarised C7 is also quite common and smaller, could be a better choice, IMHO, than any of the C13 or C5.</div><div></div><div>Best regards,</div><div></div><div>Tiago Marques</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div><div class="h5"><br>
> As for safety, adding something like the cable plug of the original<br>
> Xbox pads would work perfectly and it's not as expensive as Apple's<br>
> magnetic plug. Cost of this is something I have no clue about.<br>
><br>
> Best regards,<br>
><br>
> Tiago Marques<br>
><br>
>> i feel a earthed design only increases the risks, even more so when you<br>
>> cant depend on the quality of the mains supply.<br>
>> the only advantage to the earthed design that im aware of is that the<br>
>> power supply easier(cheaper?) meets EMC/FCC regulations.<br>
>><br>
>>> I hope future XO versions will still have the same broad power input<br>
>>> specs as the XO-1. It's been very useful already (e.g. cable-only "car<br>
>>> adapter", no voltage conversion or even voltage limit necessary).<br>
>>><br>
>>> CU Sascha<br>
>>><br>
>>><br>
>>> ------------------------------------------------------------------------<br>
>>><br>
>>> _______________________________________________<br>
>>> Devel mailing list<br>
>>> <a href="mailto:Devel@lists.laptop.org">Devel@lists.laptop.org</a><br>
>>> <a href="http://lists.laptop.org/listinfo/devel" target="_blank">http://lists.laptop.org/listinfo/devel</a><br>
>> _______________________________________________<br>
>> Devel mailing list<br>
>> <a href="mailto:Devel@lists.laptop.org">Devel@lists.laptop.org</a><br>
>> <a href="http://lists.laptop.org/listinfo/devel" target="_blank">http://lists.laptop.org/listinfo/devel</a><br>
>><br>
><br>
_______________________________________________<br>
Devel mailing list<br>
<a href="mailto:Devel@lists.laptop.org">Devel@lists.laptop.org</a><br>
<a href="http://lists.laptop.org/listinfo/devel" target="_blank">http://lists.laptop.org/listinfo/devel</a><br>
</div></div></blockquote><br>