adafruit-arduino-lesson-14-servo-motors.pdf

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1、ArduinoLesson14.ServoMotorsCreatedbySimonMonkLastupdatedon2013-06-1108:16:06PMEDTGuideContentsGuideContents2Overview3Parts4Part4Qty4TheBreadboardLayoutfor'Sweep'6IftheServoMisbehaves7ArduinoCodefor'Sweep'8TheBreadboardLayoutfor'Knob'10ArduinoCodefor'Knob'11ServoMotor

2、s12InsideaServo13OtherThingstoDo14©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-14-servo-motorsPage2of14OverviewInthislesson,youwilllearnhowtocontrolaservomotorusinganArduino.Firstly,youwillgettheservotosweepbackandforthautomaticallyandthenyouw

3、illaddapottocontrolthepositionoftheservo.©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-14-servo-motorsPage3of14PartsTobuildtheprojectsdescribedinthislesson,youwillneedthefollowingparts.PartQtyServoMotor110kΩvariableresistor(pot)1©AdafruitIndust

4、rieshttp://learn.adafruit.com/adafruit-arduino-lesson-14-servo-motorsPage4of14Half-sizeBreadboard1ArduinoUnoR31Jumperwirepack1100µFcapacitorOptional©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-14-servo-motorsPage5of14TheBreadboardLayoutfor'Swe

5、ep'Forthisexperiment,theonlythingconnectedtotheArduinoistheservomotor.Theservomotorhasthreeleads.Thecoloroftheleadsvariesbetweenservomotors,buttheredleadisalways5VandGNDwilleitherbeblackorbrown.Theotherleadisthecontrolleadandthisisusuallyorangeoryellow.Thiscontrollea

6、disconnectedtodigitalpin9.Theservoisconvenientlyterminatedinasocketintowhichwecanpushjumperwires,tolinkittothebreadboardandthentotheArduino.©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-14-servo-motorsPage6of14IftheServoMisbehavesYourservomaybe

7、haveerratically,andyoumayfindthatthisonlyhappenswhentheArduinoispluggedintocertainUSBports.Thisisbecausetheservodrawsquitealotofpower,especiallyasthemotorisstartingup,andthissuddenhighdemandcanbeenoughtodropthevoltageontheArduinoboard,sothatitresetsitself.Ifthishappe

8、ns,thenyoucanusuallycureitbyaddingahighvaluecapacitor(470uForgreater)betweenGNDand5Vonthebreadboard.Thecapacitoractsasareservoirofe