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Servo Motor

Servo Motors are easy to control from any microcontroller capable of Pulse Width Modulation (PWM). Standard servo motors can only rotate a semi-circle = 180 degrees = 3.14159.... radians. You can also get continuous rotation Servos, which you guessed it, rotate continuously. The robot shop has a nice selection if you are looking to buy, you can also get them from adafruit or this continuous rotation servo from sparkfun. The nice thing about servos is that you just need one control line to make them work and they usually run on 5-6V so you can power them with a standard 4-pack of AA or AAA batteries. In contrast, Stepper Motors often need 12V and 2 to 4 control lines. We love putting two continuous rotation servos side by side to make our bots. Then with just two control wires you have a bot capable of navigating using differential steering.
Wall-ter is a wall following robot....
Two proximity sensors help this bot avoid cliffs....
Light sensors guids this robot towards the light....
Servo motor, JPEG camera, and Arduino Leonardo combine to make a panoramic camera....
Arduino-powered spherical camera with 2 Servo Motors and an SD Card....
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