adafruit-arduino-lesson-6-digital-inputs.pdf

adafruit-arduino-lesson-6-digital-inputs.pdf

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1、ArduinoLesson6.DigitalInputsCreatedbySimonMonkGuideContentsGuideContents2Overview3Parts4Part4Qty4BreadboardLayout6ArduinoCode7PushSwitches9OtherThingstoDo10©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-6-digital-inputsPage2of10OverviewInthislesson,you

2、willlearntousepushbuttonswithdigitalinputstoturnanLEDonandoff.PressingthebuttonnearerthetopofthebreadboardwillturntheLEDon,pressingtheotherbuttonwillturntheLEDoff.©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-6-digital-inputsPage3of10PartsTocompleteth

3、islesson,youwillneedthefollowingparts.PartQty5mmRedLED1270ΩResistor(red,purple,brown1stripes)Tactilepushswitch2Half-sizeBreadboard1©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-6-digital-inputsPage4of10ArduinoUnoR31Jumperwirepack1©AdafruitIndustriesht

4、tp://learn.adafruit.com/adafruit-arduino-lesson-6-digital-inputsPage5of10BreadboardLayoutAlthoughthebodiesoftheswitchesaresquare,thepinsprotrudefromoppositesidesoftheswitch.Thismeansthatthepinswillonlybefarenoughapartwhentheyarethecorrectwayaroundonthebreadboard.Remembertha

5、ttheLEDhastobethecorrectwayaroundwiththeshorternegativeleadtotheright.©AdafruitIndustrieshttp://learn.adafruit.com/adafruit-arduino-lesson-6-digital-inputsPage6of10ArduinoCodeLoadthefollowingsketchontoyourArduinoboard.PressingthetopbuttonwillturntheLEDon,pressingthebottombu

6、ttonwillturnitoffagain./*AdafruitArduino-Lesson6.Inputs*/intledPin=5;intbuttonApin=9;intbuttonBpin=8;byteleds=0;voidsetup(){pinMode(ledPin,OUTPUT);pinMode(buttonApin,INPUT_PULLUP);pinMode(buttonBpin,INPUT_PULLUP);}voidloop(){if(digitalRead(buttonApin)==LOW){digitalWrite(led

7、Pin,HIGH);}if(digitalRead(buttonBpin)==LOW){digitalWrite(ledPin,LOW);}}Thefirstpartofthesketchdefinesthreevariableforthethreepinsthataretobeused.The'ledPin'istheoutputpinand'buttonApin'willrefertotheswitchnearerthetopofthebreadboardand'buttonBpin'totheotherswitch.The'setup'

8、functiondefinestheledPinandbeinganOUTPUTasnormal,butnowwehavethetwoinputstodealwit

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