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A slide switch is used to turn Sensor-Bot’s main power OFF and ON. When switched ON, an electric circuit is created sending power to Sensor-Bot’s two motorised wheels. The robot is programmed to travel in a continuous path until its feelers sense an object in its path. These insect like antennae are connected to snap-action switches on the front of the robot. When the robot’s feelers bump into an object they trigger either one or both of these switches, sending an electrical signal to Senso-Bot’s controller board.
 The controller board is programmed to run a sequence of movement that will redirect Senso-Bot away from the obstacle. The robot will stop, reverse, turn right 90 degrees and then continue its journey forward again.The flowchart on the left shows the controller board’s programme sequence running as Senso-Bot moves through its routine. This programme sequence is created the same way you programmed IQ-Bot’s controller board. Review the lesson on the IQ controller board in Module 2 to learn more about programming.
Now you have completed Lesson 4
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