Hi Everyone.

Sorry to waste more bandwidth, but I'm lost and confused with Eagle =
(again).

Having prototyped my first PIC circuit on breadboard, I ventured into =
the
realms of Eagle in order to home-fabricate a PCB.

- An aside- I am stunned at the success of making pcb with my =A320 diy =
"kit"
consisting of a glass dish from wilko, a shoe box with a (disco) UV =
tube in
it, aluminium foil reflectors and a picture frame. Very good. I think =
I'll
make a new PC motherboard for my next project ;-)

Anyway. In eagle, I separated the schematic out into four logical =
chunks of
my circuit (but all on the same sheet). The chunks correspond to PSU =
(~12v
to 5v with a 7805), Input Stage, PIC, and MAX232 Output stage.

I connected each of the 4 sections together with Nets for the relvant
signals, but powered each section with the +5v and GND symbols from =
supply1.

I originally had a 6-way header for ICSP (for WvO's Wisp628 really). =
But I
really couldn't get the board to route single sided without jumpers. =
So, I
decided to split the ICSP header into two - a 4 way "signal" header, =
and a 2
way power header for the programmer. This allowed me to put them in
different places on the board and thus I managed to route everything =
with no
wire jumpers.

Here's a (link to) a picture of the relevant part of my circuit, =
showing
power to the pic, and the ICSP headers -
http://draft.monster.co.uk/jon/circuit/schematic.gif (4Kb)

Obviously, checking the layout thoroughly was boring, so I went ahead =
and
made the pcb. When building, I spotted the bug. There is one track that =
is
the GND for 3 ic's, and also connected to my 2 pin ICSP power header ( =
see
the board here, I've colored the track in question with red, using my
supreme photoshop skills. =
http://draft.monster.co.uk/jon/circuit/board.gif).
But it's not grounded. Eagle has assumed that because in schematic I =
linked
the pin on the header to supply1/GND symbol, that it's actually a =
ground
"input". I've had to solder a wire on to the bottom of the board to fix =
it.

Clearly, this problem stems from me not knowing how to use eagle very =
well.
What am I actually *supposed* to do to my schematic to link all these =
things
together, without having to directly link them in the schematic =
(because
that would look messy and be harder to read)??

Thanks for your help

Jon

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