Page 18 - LEGO MINDSTORMS - Robotics Invention System-2 Projects

Robot 1 • The Bug

The Bumper

The Bug has “feelers” to help it investigate its surroundings. Pressure on the feelers tells the Bug it’s
time to stop, back up, and turn away. By having two feelers, the Bug can determine if the obstacle is
on its left or right side.

Bumper Step 0

Bumper Step 1
The touch sensors let the Bug know
when the feelers encounter an
obstacle. When the Bug runs into
something, one of the
feelers is pushed back
into the button on the
touch sensor. This
closes a contact inside the
sensor and changes the sensor
reading from 0 to 1.

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