The task of this project is to design and program a mobile robot (EV3 microcontroller) capable of navigating a preset arena as depicted below, locate and go grab an item placed randomly in one of the three target locations.
The robot utilizes 3 sensors in total:
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Ultrasonic → Measures the distance between arena objects; knowing when to stop.
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Color → For following the arena's line.
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Gyro → For making precise degree turns.
The program combines the use of all those sensors to solve more complex problems such as detecting where the item is located in the arena.
Tracks have been used for the robot's movement cause of their ability to make precise turns as well as making the robot more stable; preventing it from getting off track caused by arena bumps.
The claw utilizes mechanical engineering concepts allowing both the grab and lifting mechanisms to be performed using a single motor. The lift repositioning is crucial in giving the ultrasonic sensor a clear view of the arena which is the robot's primary navigational eyes. Furthermore, rubber bands have been added for better grip.
The color sensor for line following has been placed directly below-in the center of the robot. This placement minimizes the influence of ambient light and shadow changes on sensor readings.
Lastly, a metal ball caster has been added to the grabber and ultrasonic holder for the robot not to lean forward due to the weight concentration.
The robot scans the location of the item in the following point in the arena:
