Page 182 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

160 Making Things Move

• 100KΩ potentiometer (Jameco 29103)

• Two 0.1 μF capacitors (electrolytic shown here, but you can also use ceramic,
like SparkFun COM-08375)

Recipe:

1. Connect the 5V power and ground (from the AA battery pack) to the power
and ground columns on one side of the breadboard.

2. On the other side of the breadboard, connect the motor power (9V battery
here) to power and ground. Use a long jumper to link both ground columns
on the breadboard.

3. Plug the 555 chip into the breadboard with the small dimple on the top left
(see Figure 6-26).

FIGURE 6-26 Layout of 555 timer chip circuit