Make Electronics

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Experiment 32: A Little Robot Cart

2

3"

3"

3"

3"

8"

9"

5"

2"

1 /2"

21 /2"

21 /2"

1 / 2 "

(^1) /4"
2"
3"
4"
2"
Drill half-inch
holes to make
rounded inside
corners
Bend
Bend
Make
four
wheels

A

B

C

D

E F

Figure 5-92. These sections of 1/4-inch plastic can be assembled to create the simple cart
described in Experiment 31.

Part B is a wheel, of which you will need four. I cut them using a 3-inch hole
saw. The front wheel is screwed to whatever disc or arm you obtained to mate
with the shaft of your motor. See Figure 5-93.

Parts C, D, and E assemble to form a yoke in which the rear wheel is mounted. I
used a 2-inch hinge to pivot the yoke. The hinge is mounted on Part F, which is
a partition located midway in the frame of the cart. The photographs in Figures

Figure 5-93. A 3-inch wheel is screwed to

the disc that mates with the drive shaft of

the motor.