I'm new so don't hate on my lack of Arduino knowledge xD
I'm using an Arduino Uno with a RadioShack standard servo, but when I run the sweep program, it shuts off the Arduino and then turns it on and then moves the servo the right a little bit, then keeps shutting off and moving a little, then so forth. Once it has reached the end of its rotation point, it just keeps twitching there. After some research, I realized I needed an external power supply, so when I connect it to the power, it just moves once a tiny bit, say 10 degrees, and stops. If I want it to move again, I need to turn the power source on and off. The servo is functional, since I tried it with the "Knob" program with a potentiometer, and it works, it's just that the "Sweep" program isn't working. Here's "Sweep"
/* Sweep
by BARRAGAN <http://barraganstudio.com>
This example code is in the public domain.
modified 8 Nov 2013
by Scott Fitzgerald
http://www.arduino.cc/en/Tutorial/Sweep
*/
#include <Servo.h>
Servo myservo; // create servo object to control a servo
// twelve servo objects can be created on most boards
int pos = 0; // variable to store the servo position
void setup() {
myservo.attach(9); // attaches the servo on pin 9 to the servo object
}
void loop() {
for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
// in steps of 1 degree
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
}
and here's my schematic:
