Creating Your Own Shield - Arduino Sketches: Tools and Techniques for Programming Wizardry - page 400

Fritzing also has a schematic view that updates automatically. To view the
schematic view, click the Schematic tab. (You are currently on the Breadboard
tab.) Figure 25-5 shows my schematic.
Whoa. What is this? This is an engineering nightmare, completely unreadable.
There are dotted lines going from pin to pin, crossing over each other. This is
actually a valid layout; each connection has been made, but it still needs to be
sorted out. This takes some time but is a useful part of any project.
In the schematic view, your job is to re-create the connections in a way that
is easily readable by others (and by yourself). When you mouse over a com-
ponent, it is “selected” by a gray background. Right-clicking this component
opens a menu allowing you to perform certain actions. The most useful are
the rotate and mirror actions. By left-clicking and dragging, you can move the
components around. Attempt to move the components in a way that creates
the least amount of crossing lines. You won't make it perfect, so don't worry if
a few do cross over; this will be sorted when creating the PCB. In my view, I
have moved the components in a way that looks better, and I have also started
to make some connections between the Arduino and the two integrated circuits,
as shown in Figure 25-6.
A connection is already made between the different pins according to what
was done on the breadboard, and now your job is to make a solid, visible line
between the different pins. To do this, Fritzing helps you out. Place your cursor
above one of the pins, and it changes to blue. Click and hold down the mouse,
and you can start to create a wire. Fritzing also highlights pins that need to be
connected in red, making it easier to know what pins need to be connected.
This draws a straight line between the two pins, possibly crossing over other
wires or even components. Don't worry. You can add bendpoints by clicking
the wire that was created. Try to keep wires horizontal and vertical to make the
schematic easier to read. If you need to move a bendpoint, select the bendpoint
by hovering over it with your mouse, and then drag and drop the bendpoint
to the new location. To delete a bendpoint, hover over and then right click it,
and select the Remove Bendpoint option from the menu. Moving a component
automatically moves the i rst part of the wire up until the i rst bendpoint.
After 10 minutes, this is what I created, illustrated in Figure 25-7. It is much
clearer than the i rst version and can be shown to other makers to share ideas
or to ask for advice if needed.