The ServoTimeTimer1 Library drives servos on pins 9 and 10 by using the timer1 hardware. This library is based on the Servo Timer 1 Library but instead of controlling the angle with degrees ranging between 0 and 180, you send the actual pulse length in microseconds. Microseconds will give you more than 10 times the resolution that degrees,

Standard Methods

attach(int)

Turn a pin into a servo driver. Calls pinMode. Returns 0 on failure.

detach()

Release a pin from servo driving.

write(int)

Set the angle of the servo in microseconds 500 to 2500

read()

return the value set with the last write().

attached()

return 1 if the servo is currently attached.

Installation and Examples

You can find the an updated version of the code (for the Atmega168) here: Attach:servotimetimer1_168.zip

Unpack it into your arduino-xxxx/hardware/libraries folder (since Arduino 00010) to add the library.

Seems to have trouble compiling on Arduino IDEs 12 and up(works great on 11).

You will find an example under File/Sketchbook/Examples/Library-ServoTimeTimer1 called tow_pots_controlling_two_servos

Connect on potentiometer to analog 0 and another to analog 1. Connect one servo to digital 9 and the other to digital 10. Compile. Turn the potentiometers to move the servos.

Here is the code:

//Example code for using ServoTimeTimer1 library
// hardware control of up to two servos, on Arduino pins 9 & 10 

#include <ServoTimeTimer1.h>

#define servoPin1 9 
#define servoPin2 10
#define potPin1 0
#define potPin2 1

ServoTimeTimer1 servo1;
ServoTimeTimer1 servo2;

int potVal1 = 0;
int potVal2 = 0;

void setup()
{
  servo1.attach(servoPin1);
  servo2.attach(servoPin2);

}

void loop()
{

    potVal1 = analogRead(potPin1);

    potVal2 = analogRead(potPin2);

    //Here we convert a 0-1023 range to a 500-2546 range
    //2546 is clipped to the maximum value of 2500 internally

    servo1.write((potVal1*2)+500); 
    servo2.write((potVal2*2)+500); 

}