/* 
 ORBIT
 Photography Turntable
 
 Stepper Motor Control
 Camera Control
 
 Fall 2013
 Geoff Tsai
 
 */

#include <Stepper.h>

const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution
                                     // for your motor

// initialize the stepper library:
Stepper myStepper(stepsPerRevolution, 0,1,3,4);            

// Pin 7 has is connected to the camera shutter
int shutter = 7;


  // set the number of shots
  int shots = 120;
  
  // set the reduction used
  int wormgear = 30;
  
  // set the number of steps between each frame
  int nudge = wormgear*stepsPerRevolution/shots;

void setup() {
  // initialize the pin as an output, default to HIGH (no shot)
  pinMode(shutter, OUTPUT);
  
  // set the speed at 20 rpm:
  myStepper.setSpeed(20);
}

void loop() {
  //take a shot by bringing the pin to ground
  digitalWrite(shutter, LOW);
  delay(200);                      // experimentally determined to trigger the camera
  digitalWrite(shutter, HIGH);
  delay(1500);                     // wait for flashes to recharge
  
  // step the motor into position for the next shot
  myStepper.step(nudge);
  delay(500);
}