Jessica Chang
Created November 10, 2015

Second Project Final Week

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Second Project Final Week

Things used in this project

Hardware components

Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×1
9V battery (generic)
9V battery (generic)
×1
aa battery
×1
metal axel
×1
gears
×2
screws
×6
wheels
×6
lock pin and column
×1
econowood
×1
Rotary potentiometer (generic)
Rotary potentiometer (generic)
×1
push button switch
×1
Arduino Proto Shield
Arduino Proto Shield
×1
solid core
×1
stranded wire
×1

Story

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Code

Knob-trial.ino

Java
/* 
 Controlling a servo position using a potentiometer (variable resistor) 
 by Michal Rinott <http://people.interaction-ivrea.it/m.rinott> 

 modified on 8 Nov 2013
 by Scott Fitzgerald
 http://www.arduino.cc/en/Tutorial/Knob
*/

#include <Servo.h>

Servo steer;  // create servo object to control a servo
Servo power;
//Servo myservo2;
const int backBtn = 2; 
const int forwardBtn = 3;
int forwardBtnState = 0;
int backBtnState = 0;

int potpin = 0;  // analog pin used to connect the potentiometer
int potentVal;    // value of potentionmeter

void setup()
{
  Serial.begin(9600);
  steer.attach(9);  //attaches the steering servo on pin 9 to the servo object
  power.attach(8);  // attaches the power servo on pin 8 to the servo object
  power.write(180);
  
  pinMode(forwardBtn, INPUT_PULLUP); //taking forward button as input
  pinMode(backBtn, INPUT_PULLUP);    //taking backward button as input
}

void loop() 
{ 
  forwardBtnState = digitalRead(forwardBtn);  // read forward button state-- 1 or 0 
  backBtnState = digitalRead(backBtn);        // read backward button state-- 1 or 0
  if (forwardBtnState == HIGH && backBtnState == LOW) { //if forward button is pressed, and backward button is released
    power.write(180);
    delay(5);
  } else if (backBtnState == HIGH && forwardBtnState == LOW) {  //if backbutton is pressed and forwards button is released
    power.write(150);
    delay(5);
  } else {
    power.write(160);
    delay(5);
  }
  potentVal = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023) 
  potentVal = map(potentVal, 0, 1023, 60, 120);     // scale it to use it with the servo (value between 0 and 180) 
  steer.write(potentVal);                   //maps val to steering servo
  delay(5);                           // waits for the servo to get there 

} 

Credits

Jessica Chang

Jessica Chang

12 projects • 0 followers
jessmchang.com

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