All servos moving although only 1 should

Projects Programming
1

I have and Arduino Mega Board connected to ac power supply . I have 10 servos connected to it wich all have their signal on pins 6-13. If i ttry to move one suddenly all of them start moving.

2 
#import <Servo.h>

Servo servos[8];

void setup() {
  // put your setup code here, to run once:
  servos[0].attach(13);
  servos[1].attach(12);
  servos[2].attach(11);
  servos[3].attach(10);
  servos[4].attach(9);
  servos[5].attach(8);
  servos[6].attach(7);
  servos[7].attach(6);
}

void loop() {
  for (int pos = 40; pos <= 100; pos += 1) { // goes from 0 degrees to 180 degrees
  
    // in steps of 1 degree
  
    servos[2].write(pos);              // tell servo to go to position in variable 'pos'
  
    delay(15);                       // waits 15ms for the servo to reach the position
  
  }
  
  for (int pos = 100; pos >= 40; pos -= 1) { // goes from 180 degrees to 0 degrees
  
    servos[2].write(pos);              // tell servo to go to position in variable 'pos'
  
    delay(15);                       // waits 15ms for the servo to reach the position
  
  }
}
3

Please draw and post a schematic. show all components and connections.

This sounds like a power supply issue. You did mean DC, right? DC supplied by something you plug in to AC like at the wall?

a7

4

yeah dc but converted from ac from the wall

5

circuit
circuit1920×1674 327 KB

6

A breadboard is great for low amp digital or analog signals.

If those are SG90 things then they want about 800mA as stall current. I round that up to 1 amp per servo. A breadboard cannot handle 10 amps.

If you cannot solder and make your own servo power distribution board, I then recommend using something like this


or


or


or some other power distribution block thing.

7

Alright tank you :slight_smile: