Building the geared robot

In this section, we will be building the following robot:

Figure 5.1

To do this, perform the following steps:

1. Take your LEGO BOOST Hub and insert six working AAA batteries into it before you start constructing your robot.

   Figure 5.2

2. Take two 4x6 bricks and connect them to the top and bottom of the BOOST Hub:

   Figure 5.3

3. Take two 2x5 plates and two 1x4 plates with knobs. Connect the 2x5 plates to the 4x6 brick. Then, connect the 1x4 plates with knobs to the back of the Hub, on both sides:

   Figure 5.4

4. Take two 1x4 flat tiles and connect them to the 1x4 plates with knobs:

   Figure 5.5

5. Take two 3M pegs and connect them to the last hole of the 4x6 brick, as shown here:

   Figure 5.6

6. Take two 1x2 bricks with holes. Connect them to the recently connected 3M pegs:

   Figure 5.7

7. Take two 4M cross axles and connect them to motor A and motor B.

   Figure 5.8

8. Take two eight-teeth spur gears and connect them to the 4M cross axles...