untitled

Three 0.1 microfarad ceramic capacitors (C2, C4, C6)

Four 2 pin terminal blocks

Two 4 packs of AA batteries

Two DC gear motors (MR, ML) (GM2 with 2^5 ⁄ 8 " wheels or equivalent)

We use the GM2 model gear motors because the suppliers (Hobby

Engineering, http://www.hobbyengineering.com; and Solarbotics) carry

wheels just made to fit them, and they cost a bit less than servomotors,a

kind of motor often used in robots because it offers more control of

quick changes in motion.

2" swiveling castor

SPST (single-pole, single-throw) switch (S1)

Two wire clips

Use RadioShack part #278-1668 or something similar; essentially, you

can use anything that will secure the wires without damaging them.

^1 ⁄ 4 " thick expanded PVC, 9" x 6^1 ⁄ 2 ".

You could also use^1 ⁄ 4 " thick plywood.

6" x 9" plastic food container

Velcro

Voltage regulator0.1 microfarad capacitor Terminal block H-bridge IC Inverter IC

IR detector Resonator 10 microfarad capacitor Decoder IC

Figure 11-5:

Key receiver

components.

248 Part III: Let There Be Light