SMILEY’S WORKSHOP ☺
that visually explains how the circuit is connected.
This is not just about design; it is also about the
very important and often underserved aspect of
design: the documentation. To me, the image in
Figure 6 represents a typical way to show a design
in a schematic format.
The Printed Circuit Board Layout
To open the PCB layout window, click on the
PCB button shown in Figure 7. You’ll get a raw
layout something like what you see in Figure 8.
Your goal here is similar to what you did with the
schematic: You want to move the parts on the PCB
so that the layout makes sense. And by sense, in
this case, I mean that the parts are easiest to
connect with PCB ‘wires.’ This routing of the wires
is a skill that comes with lots of practice where you
try what seems most logical, then rip up (delete the
wire) and retry until you get something that seems
optimal to you.
In Figure 9, we see the parts placed on the
corner of the default PCB. Obviously, the default
PCB is too large so we want to adjust it, and then ...
■ FIGURE 3. The schematic, not yet wired.
Oh, the humanity! The blood was ankle deep ...
I WANT MY MONEY BACK! Oh wait ... this is free
software in beta release, so I’ll just live with this minor
inconvenience and move on. Although, this was a little
more than a minor inconvenience. What I did was close
my laptop to take somewhere with me and when I
opened the laptop back up — NOTHING! Just a black
screen and a forlorn arrow cursor that my mouse
So, I waited 10 minutes hoping the microspirits
would work some magic ... but nothing. I removed the
battery to reset it and after taking forever to completely
reboot, I got the message in Figure 10 suggesting the
Fritzing may have crashed. MAY HAVE!? I WANT MY
MONEY BACK! (Okay, let’s take a deep breath,
remember the price and that it is beta, and see what
we can recover.)
I clicked on the .fzz file and followed the
suggestions. I renamed the file just in case, and as luck
would have it I was able to recover the work. (Yeah!) It
took a while to get back in business, but again the price
is right and frankly I’m having fun with Fritzing. One
thing I noticed when recovering the file is that for some
strange reason it was saving my work in the Windows
downloads directory, so I created a new directory under
C:\Fritzing\mySketches and moved my files there. (I had
to leave again, but this time I closed Fritzing before
closing my laptop.)
Next thing I did was resize the PCB to fit the
Arduino pins so I can make this an Arduino shield,
■ FIGURE 4. Reposition the parts.
■ FIGURE 5. Adding a wire.
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