Cristian Paul Pe?aranda Rojas wrote:
> I made a wire that connects to J21 in just one direccion and
> of course not populate the 5V pins. So, once i survive to indefying righ
> pins froms shematics the cable is my safe eay to connect stuff to J21.
Heh, impressive. Seems that at least 67% of the pe
On Saturday, January 28, 2012 05:37:31 PM Werner Almesberger wrote:
> 1) Rotate in the schematics (and the documentation). Leave the
>layout as it is.
+1
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> One more J21 issue. Having those 5V there makes me a little nervous.
I could not agree more
> To save us from this sort of troubles, perhaps we could add a
> header with jumper (at some safe distance from the extension board
> area) between 5V and the 5V pins of J21. That jumper would be open
>
> I'm voting for this one.
Indeed it wil more more intuitive modify sch, I vote to
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By the way, Joerg suggested we add an overvoltage protection
circuit, e.g., conceptually like this crowbar (in German, sorry):
http://www.elektronik-kompendium.de/public/schaerer/crowbar.htm
The overvoltage protection would have to be synchronized such
that an excursion - e.g., when 3V3 and 5V ar
One more J21 issue. Having those 5V there makes me a little nervous.
Not only could any contact with them upset things I plug into J21
(which usually wouldn't be designed for 5V), but it's quite possible
that 5V could end up by mistake, be it in the design of a board
under development or just by pl
> 1) Rotate in the schematics (and the documentation). Leave the
>layout as it is.
I'm voting for this one.
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When working on the ledm board, I realized that the orientation
of J21 is a little confusing:
In the schematics, it's drawn with 5V/3V3 at the top and ground
at the bottom, which is a fairly common way of showing things.
Now, in the PCB layout, the "top" of J21 is close to the edge
of the PCB and
