Hello Seb,


> > Ok, I will only add 3.3V to spare pin of the power connector, but am
> > afraid i will at least need to add 1 via and maybe more :-(.
>
> Do you mean it would be simpler if you put 3.3V selection and all the
> whistles about 3.3V ?... :)
>

Well, it is quit simple to make +5V selectable between 3.3V and 5V
because the traces don’t need to be changed so except for serial
connector (this better stay on 5V) all +5V when selected on 3.3V will
become 3.3V so on power connector that +5V will also become 3.3V
(spare stays unconnected).

above is easier but if you want the main board on 5V and need only
3.3V for the shield (and off course dealing with the voltage level
adjustments on the shield) this would be impossible.

But every time when you need 3.3V on a shield you also want to power
your main board with 3.3V so that you don’t have to deal with voltage
level adjustments, well than it is the easiest way.

In my opinion is 3.3V on the spare pin of the  power connector AND 5V
selectable between 3.3V and 5V the most flexible option (but off
course also the most impact on the pcb)

>
> OK, I'll try to find one of these.
> I've ordered more copper clad boards & more stuff on eBay, I hope to receive
> them this week so I can build this upcoming board next WE.

Lets hope the next one will be the final one for Jaluino Medium
homebrew

>
> Cheers,
> Seb



Greetz

Richard

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