b'Circuit 3A: ServoIn this circuit, you will learn how to wire a servo and control it with code. Servo Motors motors can be told to move to a specific position and stay there. Low-cost servo motors were originally used to steer RC airplanes and cars, but they have become popular for any project where precise movement is needed.YOUSERVO8 JUMPER WIRESSCISSORSNEEDPOTENTIOMETER(NOT INCLUDED)NEW COMPONENTSSERVO MOTORS: Regular DC motors have two wires. When you hook the wires up to power, the motor spins around and around. Servo motors, on the other hand, have three wires: one for power, one for ground and one for signal. When you sendATTACHING YOUR SERVO: the right signal through the signal wire, theA strip of adhesive Dual LockTM servo will move to afastening tape is included in your kit. specific angle and stayCut two pieces of it to temporarily there. Common servos rotate over a rangeaffix your servo to your baseplate. of about 0 to 180. The signal that is sent is a PWM signal, the same used to control theNEW CONCEPTSRGB LED in Project 1. DUTY CYCLE: Pulse-Width Modulation Included with(PWM) is a great way to generate servo your servo motorcontrol signals. The length of time a PWM you will find asignal is on is variety of motorreferred to as mounts thatthe duty cycle. connect to theDuty cycle is shaft of your servo. You may choose tomeasured in attach any mount you wish for this circuit.percentage. It will serve as a visual aid, making it easierThus a duty cycle of 50 percent means the to see the servo spin. The mounts will alsosignal is on 50 percent of the time. The be used at the end of this project. variation in the duty cycle is what tells the servo which position to go to in its rotation.54 : circuit 3a'