> I don't usually connect several grounds with wires to a single ground
> symbol, but rather prefer to use one ground symbol for each ground
> connection, unless the pins are grouped side-by-side, then I use one
> ground symbol for the group.

Agreed - unless there is some particular point to emphasising that the part=
icular components are being taken to a 'star ground' point as may happen in=
 an RF circuit, but that is getting more specialised than this circuit.


> This way it is easier to see what pins are grounded, instead of running
> the eyes along a wire (sometimes very far) to find that a pin a
> connected to ground.
>=20
> I also prefer to lay all ground symbols pointing down, and use the
> normal ground symbol (three parallel lines with decreasing length), as
> many symbols as possible aligned in horizontal rows at same height.
=20
<y preference is to use the 3 bars symbol for circuit or signal ground, and=
 a triangle for chassis ground (e.g. mains ground on a power plug). Ground =
labels should only be used where grounds are split out to separate analogue=
 ground and digital ground, for example.=20

=20
> Aligning the vertical or horizontal centers of components that are laid
> parallel to each other is nice also.
>=20
> Try to arrange components that are close together in the same
> orientation (horizontal or vertical), even if the schematic grows little.
>=20
> Avoid too many zig-zag in the wires.

Another 'rule' is that the wiring should be laid out so that a given pair o=
f signals only crosses once, e.g. the connection from pin 19 would be route=
d under the ground at the bottom instead of crossing all the ground connect=
ions multiple times. It is not always possible to enforce this nicely, but =
should be done if possible.
--=20
Scanned by iCritical.

--=20
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