please help
i want code for 4 servo motors controlled by arduino uno
Hi noga,
Go check the links that BillHo included. The Arduino site has a lot of examples to use.
Have you programmed the Arduino before? If not, go look at the tutorials on the site for additional information. Good stuff!
Pat.
BillHo:
Servo - Arduino Referencehttp://arduino.cc/en/Tutorial/Sweep
Overview | Arduino Lesson 14. Servo Motors | Adafruit Learning System
thanks alot for your help 
i will see this links .
but i have another request ,i try to make robot arm to feed armless people but i cannot determine the angles in which the servo motors move to achieve certain motion .
could you tell me method to determine the angles of the motors ?
noga:
please help
i want code for 4 servo motors controlled by arduino uno
Multiservo test code.
//zoomkat 11-22-12 simple delimited ',' string parse
//from serial port input (via serial monitor)
//and print result out serial port
//multi servos added
String readString;
#include <Servo.h>
Servo myservoa, myservob, myservoc, myservod; // create servo object to control a servo
void setup() {
Serial.begin(9600);
//myservoa.writeMicroseconds(1500); //set initial servo position if desired
myservoa.attach(6); //the pin for the servoa control
myservob.attach(7); //the pin for the servob control
myservoc.attach(8); //the pin for the servoc control
myservod.attach(9); //the pin for the servod control
Serial.println("multi-servo-delimit-test-dual-input-11-22-12"); // so I can keep track of what is loaded
}
void loop() {
//expect single strings like 700a, or 1500c, or 2000d,
//or like 30c, or 90a, or 180d,
//or combined like 30c,180b,70a,120d,
if (Serial.available()) {
char c = Serial.read(); //gets one byte from serial buffer
if (c == ',') {
if (readString.length() >1) {
Serial.println(readString); //prints string to serial port out
int n = readString.toInt(); //convert readString into a number
// auto select appropriate value, copied from someone elses code.
if(n >= 500)
{
Serial.print("writing Microseconds: ");
Serial.println(n);
if(readString.indexOf('a') >0) myservoa.writeMicroseconds(n);
if(readString.indexOf('b') >0) myservob.writeMicroseconds(n);
if(readString.indexOf('c') >0) myservoc.writeMicroseconds(n);
if(readString.indexOf('d') >0) myservod.writeMicroseconds(n);
}
else
{
Serial.print("writing Angle: ");
Serial.println(n);
if(readString.indexOf('a') >0) myservoa.write(n);
if(readString.indexOf('b') >0) myservob.write(n);
if(readString.indexOf('c') >0) myservoc.write(n);
if(readString.indexOf('d') >0) myservod.write(n);
}
readString=""; //clears variable for new input
}
}
else {
readString += c; //makes the string readString
}
}
}
It depends on the servos. What kinds do you have? You should also be able to find that information on their spec sheets. Most ranges are 0-180 degrees (or a little less, like 10-170 degrees). The positions are set by sending them short pulses that correspond to desired angles.
noga:
but i have another request ,i try to make robot arm to feed armless people but i cannot determine the angles in which the servo motors move to achieve certain motion .
could you tell me method to determine the angles of the motors ?
Please read these links
Beginner's Robotic Arm
http://forum.arduino.cc/index.php?topic=61453.0
Can I Control More Than X Servos With An Arduino ?
Easy and Simple Arduino Robot Arm