Bobo the Robot

Bobo can’t do much if he can’t react to his environment. In this section, we’ll create a basic bumper that will allow Bobo to detect objects in front of him.

For this step you’ll need:

Quantity	Color	Item Description
1	Black	2x4 L-shaped Lift Arm
1	Black	Axle 6
1	Gray	Touch Sensor With Wire
2	Black	Bent Lift Arms
2	Gray	Lift Arms
2	Gray	Cams
2	Gray	Angle Connector #5
4	Gray	1/2 Bushings
4	Black	Axle 4

Step 1.        First attach a wire to the touch sensor. I suggest attaching it sideways, as shown:

Step 2.        Attach 2 Axle 4 to a cam and push it through the hole in the touch sensor.

Step 3.        Now add 2 1/2 bushings and the L-shaped liftarm to the top axle.

Step 4.        Cap the ends of the axles with another cam.

Step 5.        Place the Axle 6 through the hole at the bend of the lift arm and place a Connector 5 on each end.

Step 6.        Add 2 more 1/2 bushings to keep the Connector 5s in place. Make sure that the connectors can move freely.

Step 7.        Then attach Axle 4s to each connector 5.

Step 8.        Attach the flat lift arms to the protruding axles. These will form the plunger that will push the touch sensor.

Step 9.        All we have left to do is attach the bent lift arms to act like antennae. This way, the robot can sense objects that are not directly in front of it.

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