- Use phototransistors to detect different light intensity
- Different values of currents flow in BJTs under different light intensity
- Adjust 2 wheels’ speeds according to light intensity, so that the robot moves towards the light
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Use PWM to generate the sinusoidal displacement of the shafts --> moving antennae
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The servo motors are connected to 2 antennae which can oscillate in range between 75 and 115 degrees --> Larger detection area --> More precise moving
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This video shows the performance of the robot.