■ FIGURE 21.
■ FIGURE 22.
■ FIGURE 23.
■ FIGURE 24. End bend.
■ FIGURE 25. The DS1307RTC kit.
USB Logic Analyzer
blue wire that wasn’t very visible over the Arduino, so I
right-clicked on it and got the option to change the wire
color to yellow. I then changed the Arduino ground wire
color from blue to black. I suggest you change all the
wire colors to match the illustration in Figure 1, just to
keep things simple.
Right angle bends are fine, but when you build this
with real wires you are going to have a lot of curves.
Fritzing helps illustrate this by
allowing you to add curved bends.
Just hold down the CTRL key when
you left-click on a wire, and you’ll
get a rounded bend. This is
something you need to fool around
with a bit since describing it isn’t as
useful as actually watching what
happens. You should get something
like the curves shown in Figure 1.
Now we know how last
month’s Arduino/DS1307 RTC on
a breadboard was generated. We
are now ready to use this design in
Fritzing to generate a schematic
and layout for a printed circuit
board — which we will do next
month in Part 2.
Pocket-Sized Digital Oscilloscope
Another Real Time
Arduino Uno Starter Kit
FM Transmitters Timers Audio Amplifiers Motor Controllers • • • • Custom Designs
4-Port USB Relay Controller with
6-Channel Analog/Digital Interface
This two-part Fritzing tutorial
shows you how to design and build
your own DS1307-based real time
clock. If you just want one to play
with, you can purchase the
DS1307RTC kit (which contains all
the parts you’ll need) from the
Nuts & Volts Webstore. See you
next time. NV