Instructables user Sieuwe Elferink has just created a semi-autonomous kids’ four-wheeler. The Arduino powered Quad can steer itself within a set of lines, and stop for pedestrians and inanimate objects. For this project you will need the following materials: 3x TCRT5000 line sensor 1x HC-SR04 ultrasonic sensor 4x 5V relay 1x Windshield wiper motor 1x Arduino 2x tooth…
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