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remote controlled car problem

dirtdiver

Hello everyone, here is the problem :

I'm making a remote control truck with the Arduino but the analog pins are just not enough.I have 2 analog pins left and I have to control 4 servos with potentiometers.

 

Now, my idea is to use the 1st pin for a pot that is separatet into 4 sections.Each section will connect the pot from the 2nd analog pin to servos 1-4.

I dont know if that is possible so please tell me if I can do that and how to do it.

Also if you can think of something else that solves my problem, feel free to share it!

Thanks for the help!

  • 0

    i did a similar build for a tech fair wat scale are you aiming for do you want full motor control or just partial

  • 0 in reply to Former Member

    Well here's what I've wrote so far, you will get the idea of what Im tring to do.The code is not working and I dont really know why

     

    Servo myservo;  // create servo object to control a servo
    Servo myservo1;

    int potpin1 = 0;  // analog pin used to connect the potentiometer
    int potpin = 1;
    int val;    // variable to read the value from the analog pin

    void setup()
    {
      myservo.attach(9);  // attaches the servo on pin 9 to the servo object
    myservo1.attach(10);
    }

    void loop()
    {
      if (potpin1 > 500){
       val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023)
      val = map(val, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180)
      myservo.write(val);                  // sets the servo position according to the scaled value
      delay(15);
      } else  {
      val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023)
      val = map(val, 0, 1023, 0, 179);     // scale it to use it with the servo (value between 0 and 180)
      myservo1.write(val);                  // sets the servo position according to the scaled value
      delay(15);
      }
    }

  • 0 in reply to dirtdiver

    In your "if" condition, do you mean to check the analogRead value of potpin1, instead of just the value of potpin1 (which is always set to 1), like so:

     

    if (analogRead(potpin1) > 500){

  • 0 in reply to Former Member

    Thanks man, it worked when i changed it!

  • 0

    If you want to use one servo at one time this can be solve

    divide potentiometer reading into  4 parts on each part use one servo motor

    and map each part in the if block seperatly in the defined range..

     

    for eg

    analogread(val)

    0-255 1st motor

    255-512 2nd motor

    512-767 3rd

    767-1023 4th

    and map them

     

    for eg

    2nd one as

    map(val,255,512,0,179)

    and so on...