Standard Servo Motor with Pushbutton and Potentiometer

Control the direction and range of motion on a "standard", noncontinuous, servo motor with a push button.

Add a potentiometer for more control.

Ingredients:

1 pushbutton

1 potentiometer

1 standard servo motor (will not work with continuous servo motor)

1 arduino board

1 breadboard

1 100K resistor

jumper wire

int servoPin = 2;     // Control pin for servo motor (digital port)

int minPulse = 500;   // Minimum servo position

int maxPulse = 2500;  // Maximum servo position

int pulse = 0;        // Amount to pulse the servo

long lastPulse = 0;    // the time in milliseconds of the last pulse

int refreshTime = 20; // the time needed in between pulses

int inButton = 3;   // choose the input pin for a pushbutton (digital port)

int valButton = 0;     // variable for reading the pin status

int dtime = 50;

int  potpin = 1;  // choose the pin for the potentiometer (analog port)

int valpot = 500;

void setup() {

  pinMode(servoPin, OUTPUT);  // Set servo pin as an output pin

  pinMode(inButton, INPUT);

  pulse = minPulse;           // Set the motor position value to the minimum

  Serial.begin(9600);

}

void loop() {

  valpot = analogRead(potpin) + 500;    // read the value from the sensor

  Serial.println(valpot);

  valButton = digitalRead(inButton);  // read input value

  if (valButton == HIGH){

    int dtime = 150;

   // pulse = 2300; // changing this number will change the position it will start at

     pulse = valpot;

  }

  else{

    pulse = 500; // changing this number will change the other position it will go to

    int dtime = 0;

  }

  // pulse the servo again if rhe refresh time (20 ms) have passed:

  if (millis() - lastPulse >= refreshTime) {

    digitalWrite(servoPin, HIGH);   // Turn the motor on

    delayMicroseconds(pulse);       // Length of the pulse sets the motor position

    digitalWrite(servoPin, LOW);    // Turn the motor off

    lastPulse = millis();           // save the time of the last pulse

    delay(dtime);

  }

}