[tr6scott]

Here is my hacked code for our test box, that drives two jags, for our test box. It has two pots that are used for speed controls, to drive the servo output, there are two pots and two jags on our test box.

I did this many years ago, it uses the map command, it works. Hopefully it helps. It has been a long time since I played with it, but we use it everyday for prototyping.

The jag connected to myservo runs forward and reverse, the jag connected to the myservo1 only runs forward. Look at Map command arguments, 90 to 180.

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

#include <Servo.h> 
 
Servo myservo;  // create servo object to control a servo 
Servo myservo1;  // create servo object to control a servo 
 
int potpin = 0;  // pot in is 13 pwm analog pin used to connect the potentiometer
int potpin1 = 1;  // analog pin used to connect the potentiometerint val;    // variable to read the value from the analog pin 
int val =0;
int val1=0;
void setup() 
{ 
 myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
 myservo1.attach(10);  // attaches the servo on pin 9 to the servo object 
} 
 
void loop() 
{ 
  val = analogRead(potpin);            // reads the value of the potentiometer (value between 0 and 1023) //
  val1 = analogRead(potpin1);            // 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) 
  val1 = map(val1, 0, 1023, 90, 179);     // scale it to use it with the servo (value between 0 and 180) 
   myservo.write(val);                  // pwm 13 sets the servo position according to the scaled value 
   myservo1.write(val1);                  // sets the servo position according to the scaled value 
  delay(15);                           // waits for the servo to get there 
}