🚀 go-pugleaf

On 9/03/2012 8:54 AM, Paul wrote:
> In article<4f59230c$1@dnews.tpgi.com.au>, keith@nowhere.com.au says...
>>
>> On 9/03/2012 3:00 AM, Paul wrote:
>>> In article<9rqf87FadnU1@mid.individual.net>, 5V@2.5A says...
>>>>
>>>> On 08-Mar-12 11:51 AM, Nico Coesel wrote:
>>>>> Don McKenzie<5V@2.5A>    wrote:
>>>>>
>>>>>> On 08-Mar-12 10:23 AM, Paul wrote:
>>>>>>
>>>>>>> Hopefully also unlike rPI have mounting holes and a decent power
>>>>>>> connector.
>>>>>>
>>>>>> http://www.olimex.com/about.html
>>>>>>
>>>>>> The company has over 20 years? experience in designing, prototyping and
>>>>>> manufacturing printed circuit boards, sub-assemblies, and complete
>>>>>> electronic products.
>>>>>>
>>>>>> I doubt very much if you will see any of these problems Paul. :-)
>>>>>
>>>>> You never know. I've worked with designers with 20+ years of
>>>>> experience who totally forget about mounting holes, forget about
>>>>> clearance around screw heads or move holes on the next batch while
>>>>> there are 100's of cases in stock with holes that match the 'old'
>>>>> version. Did I already mention small 2mm / 78mil mounting holes? If it
>>>>> where one project you might call it a mistake. On almost every project
>>>>> its a real nuisance.
>>>>
>>>> I just had a look at the RPi videos, and they seem to have mounting
>>>> holes and a DC power input plug.
>>>>
>>>> So I wonder what Paul was referring to.
>>>>
>>>> Cheers Don...
>>>>
>>>> ================
>>>
>>> All the pictures and user guide show NO mounting holes and was discussed
>>> early in rPI thread. Without ability to mount on or in something for
>>> education it will be a nightmare. Let alone more will be "lost" or
>>> is sometimes known as "trousered".
>>>
>>> Power is by MicroB USB connector, and takes 700mA according to User
>>> Guide. So I see a lot of problems with crappy cables being used to power
>>> it and PCs complaining about over current.
>>>
>> Why would you want to power it from a PC? A wall wart would be a much
>> better idea, it is a standalone system after all it doesn't need a PC
>> connection to program it like an Arduino.
>
> Firstly it is suggested by them to use an MP3/camera/phone USB to microB
> cable in the user guide.
>
> Secondly the base price does not include a wall wart. I don't think it
> even includes a USB cable either.

A wall wart with included micro USB connector costs less that 10 bucks. 
That is if you don't have one already, virtually every smartphone other 
than Apple's products use them as a charger.

> Thirdly because that is what people WILL be doing

What makes you think that? It makes no sense to do so

> A classromm with computers already why get out wall warts (which at
> least one kid will trouser as he could do with one or thjinks it will be
> cool).

Not if they have a bunch at home already

> A classroom with other computers already there teacher does not have
> to hand out an extra thing.

You don't hand them out, they are set up in the computer lab already 
along with the screen, mouse and keyboard.

> People at home forget to get a wall wart or take board to show someone
> else or nerdy kid takes with him to 'play' with elsewhere and forgets
> wall wart.

USB wall warts are ubiquitous.

> Someone travelling between countries and different shaped holes in walls
> so wall wart does not work.

Most USB wall warts are of the universal voltage type, you just buy a 
cheap adaptor. I even have one that came with slip in connectors that 
cover 90% of the power sockets in use in the world.