3 way toggle pin and servo motor

Projects Programming
1

Hello!

I am trying to control a servo motor with a 3 way toggle switch. When I turn my switch to the right, I want the servo motor to turn to 180 degrees, when I turn it to the left I want it to be at 0degree and finally when it is in the neutral position I want it to be at 90 degrees.

Right now my code only works for left and middle position and I am not able to make work the right position.

Could someone help me plz :slight_smile:

Here is my code for the moment :

#include <Servo.h>

// Pin numbers for the switches and servo
const int switchPin1 = 2;
const int switchPin2 = 3;
const int switchPin3 = 4;
const int servoPin = 9;

// Servo object
Servo servoMotor;

// Variables to track the switch state
int switchState1 = 0;
int switchState2 = 0;
int switchState3 = 0;

// Variables to store the servo positions
int servoPosition = 90;

void setup() {
  // Initialize the servo and switch pins
  servoMotor.attach(servoPin);
  pinMode(switchPin1, INPUT_PULLUP);
  pinMode(switchPin2, INPUT_PULLUP);
  pinMode(switchPin3, INPUT_PULLUP);

  // Set the initial servo position to 90 degrees
  servoMotor.write(servoPosition);
}

void loop() {
  // Read the current state of the switches
  switchState1 = digitalRead(switchPin1);
  switchState2 = digitalRead(switchPin2);
  switchState3 = digitalRead(switchPin3);

  // Check switch positions and control servo accordingly
  if (switchState1 == LOW) {
    // Switch 1 ON - Move servo to 0 degrees
    //for (int pos = servoPosition; pos >= 0; pos--) {
      servoMotor.write(0);
      //delay(15);
    //}
    //servoPosition = 0;
  } else if (switchState2 == LOW) {
    // Switch 2 ON - Set servo to 90 degrees
    servoMotor.write(90);
    //servoPosition = 90;
  } else {
    // Switch 3 ON - Move servo to 180 degrees
    //for (int pos = servoPosition; pos <= 180; pos++) {
      servoMotor.write(180);
      //delay(15);
    //}
    //servoPosition = 180;
  }

  delay(100); // Delay for stability
}
2 
#include <Servo.h>

// Pin numbers for the switches and servo
const int switchPin1 = 2;
const int switchPin2 = 3;
const int switchPin3 = 4;
const int servoPin = 9;

Servo servoMotor;

void setup() {
  servoMotor.attach(servoPin);
  pinMode(switchPin1, INPUT_PULLUP);
  pinMode(switchPin2, INPUT_PULLUP);
  pinMode(switchPin3, INPUT_PULLUP);
}

void loop() {
  if (!digitalRead(switchPin1))servoMotor.write(0); 
  if (!digitalRead(switchPin2))servoMotor.write(90); 
  if (!digitalRead(switchPin3))servoMotor.write(180); 
}
3

Welcome to the forum

Please provide more details of the switch. For instance, does it have a common pin which is connected to one or other of the other 2 pins and is not connected to anything when in the centre position ? Or is there a different arrangement ?

4

Hi,

Here is the switch that I have : McMaster-Carr

5

This code that you provide to me doesn't work unfortunally :frowning: . I want the servo to stay in the position and not moving back and forth

6

why? is servo damaged? or you try this on some simulator?
switch itself may be issue

7

Hello b_d

Provide a schematic of the hardware setup.

8

You wiring is wrong for that type of switch
sw

9

Here is who I wired everything

MicrosoftTeams-image (2)
MicrosoftTeams-image (2)1920×2560 231 KB

10

How do I adapt my code to this kind of wiring?

11 
void loop() {
  // Read the current state of the switches
  switchState1 = digitalRead(switchPin1);
  switchState3 = digitalRead(switchPin3);

  // Check switch positions and control servo accordingly
  if (switchState1 == LOW) {
    // Switch 1 ON - Move servo to 0 degrees
    servoMotor.write(0);
  
	} else if (switchState3 == LOW) {
    // Switch 3 ON - Set servo to 180 degrees
    servoMotor.write(180);
  
	} else {
    // Move servo to 90 degrees
    servoMotor.write(90);
  }

  delay(100); // Delay for stability
}
12

Just connect the middle pin of the switch to GND rather than Arduino Pin 3

13

How do I adapt my code to this kind of wiring?

Don't use that wiring. Connect like this
image
use INPUT_PULLUP mode on the inputs

14

When I turn it to the left it goes to 0 degree
When I turn it to the right nothing happens
When I turn it in the middle it goes at 180 degrees

Why is this happening?

15

Did you use my code?

16

Yes

17

And how is the switch wired ?

18

the middle wire to the ground and one to the 2 and one to the 4

19

Post images of your wiring. Post an image of the switch. You probably have an error.

Try swapping the wires on pin 2 and 4. Report the behaviour.

20

Hello b_d

Consider - keep in track the port pins for the switch.

#include <Servo.h>

// Pin numbers for the switches and servo
const int switchPin1 = 2;
const int switchPin2 = 3;
const int servoPin = 9;
// Servo object
Servo servoMotor;
// Variables to store the servo positions
int servoPosition = 90;

void setup()
{
  // Initialize the servo and switch pins
  servoMotor.attach(servoPin);
  pinMode(switchPin1, INPUT_PULLUP);
  pinMode(switchPin2, INPUT_PULLUP);
  // Set the initial servo position to 90 degrees
  servoMotor.write(servoPosition);
}
void loop()
{
  (digitalRead(switchPin1)?LOW:HIGH)?servoMotor.write(90):servoMotor.write(0);
  (digitalRead(switchPin2)?LOW:HIGH)?servoMotor.write(90):servoMotor.write(180);
}

Have a nice day and enjoy coding in C++.