GuruBlog

This weekend I created the YesNoBot - a simple robot that is able to nod and shake its head.

I used two servo-motors a bunch of cablebinders, an arduino and a sheet of paper to create the bot. I wrote some build instruction after the video

The servos get tied together using two cable binders as shown in the image below. I also used two brackets to stabilize the lower servo a bit. The head is cut from a sheet of paper and sticked to the upper servo using sticky tape.

The servos get connected to 5+ and Gnd on the arduino, the control lines are connected to pin 9 and pin 10. Here is the code that runs on the arduino to move the head.

#include <Servo.h>

Servo s1;
Servo s2;

int p1 = 0;
int p2 = 0;

void setup() {

    s1.attach(9);
    s2.attach(10);
    s1.write(90);
    s2.write(22);
}

void loop() {
  for (int i=0; i<2; i++) {
    for( p1 = 45; p1 < 135; p1++) {
      s1.write(p1);
      delay(5);  
    }
    for( p1 = 135; p1 > 45; p1--) {
      s1.write(p1);
      delay(5);  
    }

  } 
  s1.write(90);

  delay(30);
  for ( int i=0; i<2; i++) {
    for (p2 = 45; p2 > 0; p2--) {    
      s2.write(p2);
      delay(15);      
    }
   for (p2 = 0; p2 < 45; p2++) {    
      s2.write(p2);
      delay(15);      
    }
  }
  s2.write(22);
  delay(30);

}