■ FIGURE 8. The Arduino and Wave
Shield mounted on a 1/8" plastic base, with
battery. The base is in lieu of an enclosure.
for peace of mind — you may wish to include them.
Following the “keeping it simple” principle of this
project, you don’t need a fancy enclosure for the Arduino
and Wave Shield. Instead, mount your Arduino to a piece
of 1/8” plastic or plywood for a base, then use a nine volt
battery metal holder on the back as a belt clip, and
another holder for the nine volt battery used for power.
Figure 8 shows the Arduino and shield mounted to a
piece of black plastic; Figure 9 shows the back side with
the battery holder for a belt clip.
Wiring the LEDs
Use ordinary 26 gauge stranded and insulated wire to
connect between the external
components (LEDs and sensors) and the
breakout board. For the LEDs and
pushbutton switch, use about three feet
of wire. Use a shorter length — no more
than about 15” or 20” for the piezo disc
— or else substitute with shielded wiring.
36 September 2012
■ FIGURE 9. Use a nine volt battery holder as a belt clip
on the back side of the plastic base.
■ FIGURE 10. Secure the components to the inside
of the t-shirt material using high tack masking tape
or white bandage tape.