corners in the other piece. You do this by flipping the piece
with the hole as needed. Once all four holes are marked,
drill them out and use this piece to make the original.
Take the completed carrier module and attach some
double stick foam tape to the bottom, then attach the carrier to the base as shown in Figure 8. Notice how I placed
stand-offs on the board so I can judge the distances better.
the antenna connector is off to one side of the card slot.
This way, if you decide to use an external antenna it won’t
be in the way when you insert the memory card into its
socket. Place some double stick tape on the bottom of the
memory breakout board and attach it to the base as shown
in Figure 12.
• STEP 4: The EM 408 comes with a small cable that needs
to be modified for this project. You can purchase an extra
cable from SparkFun, if needed. Cut one end and attach
the leads to small headers as shown in Figure 9.
• STEP 5: Take the SD memory breakout board and attach
a five-pin header into the first five pads shown in Figure 10.
Take a few pieces of double stick foam tape and attach
them to the memory board as shown in Figure 11. Now
take the EM 408 and attach it to the memory board as
shown in Figure
11. Make sure
• STEP 6: Take a red LED and attach a 1K resistor as shown
in Figure 13. Then cut the leads so that they can slip into the
crimp pins as shown in Figure 14. You can also solder the
leads to the crimp pins. As an option, you may connect a
small bit of heat shrink to the leads as shown in Figure 15.
Repeat the step with the green LED. If you don’t want to use
the crimp pins, you can use a two-pin female header instead.
• STEP 7: Attach two crimp pins to a pushbutton as shown
in Figure 16. You can also use a female header. The actual
connection technique depends upon the type of button that
you use. As before, you can cover the leads with heat shrink.
• STEP 8: Attach the red LED to ports
0 and 1 as shown in Figure 17.
Make sure the flat side of the LED is
connected to port 0. Attach the green
LED to ports 2 and 3. Make sure the
flat side of the LED is attached to port
2. Attach the button to ports 6 and 7
as shown in Figure 17.
• STEP 9: You need to build a battery
connector assembly. This connector
will work with the six-cell battery
62 SERVO 11.2008