project) to drive the coffin around. You
can see the layout of the four littleBits
modules in Figure 5.
There are four modules in the Coffin
Cruiser project: power; remote trigger;
long LED; and DC motor and motorMate.
While two members of this cast of
characters are already familiar to us, two
others merit a brief introduction.
The remote trigger (i7) is a pink color-coded input module. This module is
primarily responsible for all of the magic
that happens with the Coffin Cruiser. The
remote trigger enables you to use any TV
remote control for turning the DC motor
ON and OFF. Just press any button on
your TV remote and the DC motor turns
ON. Release the button, and the DC
motor turns OFF. This is a great module
for converting a LEGO kit into a remote
The second new littleBits member is
the green color-coded output module
long LED (o2). This is a bright white LED
fixed to the end of a long stiff flexible
wire. The long LED is, therefore, ideal for
adding a touch of light at a considerable
distance from the littleBits circuit.
The actual conversion of the LEGO
hot rod kit into the Coffin Cruiser begins
at Step 22 of the building instructions.
Add the four-module littleBits circuit to
the underside of the left rear axle and
secure it in place with two black four inch
zip ties as in Figure 6. You will have to
remove approximately seven previously
installed LEGO building elements from this
area. When you remove the beige LEGO
axle (which you previously added in Step
15, part 1), insert this piece into the
Finally, snake the long LED up and
into the dashboard area of the driver’s
compartment. You may now complete the
remainder of the LEGO kit by following
the building instructions.
In order to give the kit a scary “wobbly” drive, install
one large kit tire on the motorMate axle and one of the
smaller kit tires on the right rear axle. Likewise, flip this tire
wobble arrangement for the front axle: small kit tire on the
left front axle and larger kit tire on the right front axle.
Furthermore, this wobbly configuration ensures that the
working V6 engine (complete with moving piston heads)
operates while the Coffin Cruiser is driving around the
candy dish (see Figure 7). Just crank the front steering tires
into a tight turn and use the TV remote control to
“secretly” maneuver the Coffin Cruiser in a scary drive of
death (Figure 8).
The Hand of Fate
Speaking of the candy dish, you can make sure that all
of your visitors relish your treats by “handing” out candies
with a talking hand. The Hand of Fate is our final littleBits
SERVO 09.2015 45
to the bottom
of the left rear
Figure 5. Coffin
Cruiser is a
great RC bot,
using only four