ArduinoMania

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/* ===============================================================
      Project: DIY Canon Intervalometer using Arduino
       Author: Scott C
      Created: 9th October 2014
  Arduino IDE: 1.0.5
      Website: http://arduinobasics.blogspot.com/p/arduino-basics-projects-page.html
  Description: Use Arduino as an intervalometer for Canon PowerShot SX50 HS
               A slide potentiometer is used to control the time between photos.
               The LED Bar is used to display the delay between photos.
               A 3 core 2.5mm jack is used to connect the Arduino and Relay module to the Camera.
================================================================== */

 /* You will need to download and install the LED_Bar library from here: https://github.com/Seeed-Studio/Grove_LED_Bar */
 #include <LED_Bar.h>

 /* Connect 5V on Arduino to VCC on Relay Module
    Connect GND on Arduino to GND on Relay Module */

 #define CH1 7   // Connect Digital Pin 7 on Arduino to CH1 on Relay Module
 #define CH3 6   // Connect Digital Pin 6 on Arduino to CH3 on Relay Module
 
 int potPin=A0;    //Connect Slide potentiometer to Analog Pin 0 on Grove Base Shield
 int potValue=0;   //The variable used to hold the value of the potentiometer

 LED_Bar bar1(9,8); //Connect LED Bar to Digital I/O 8 on Grove base shield.
                   //The LED Bar actually uses digital pin 8 and 9.

 void setup(){  
   pinMode(CH1, OUTPUT);
   pinMode(CH3, OUTPUT);
   
   //Turn OFF any power to the Relay channels
   digitalWrite(CH1,LOW);
   digitalWrite(CH3,LOW);
   delay(2000); //Wait 2 seconds before starting sequence
   
   //Focus camera by switching Relay 1
   digitalWrite(CH1, HIGH);  
   delay(2000);
   digitalWrite(CH1, LOW);   //Stop focus
   delay(3000);
 }

 void loop(){
      // Read the slide potentiometer and convert the reading to a value between 0 and 10.  
      potValue=constrain(map(analogRead(potPin),0,1000,0,10),0,10);
      
      //Use the pot value to create a visual count-down display on the LED bar.
      for(int i = potValue; i>0; i--){
        bar1.setLevel(i);
        delay(1000);
      }
      
      //If the pot value is less than 1, then delay for 30 seconds.
      if(potValue<1){
        delay(30000);   
      }
      
      //Turn LED Bar off when taking photo
      bar1.setLevelReverse(0);
      
      //Press shutter button for 0.1 seconds. Modify delay if required.
      digitalWrite(CH3, HIGH);  
      delay(100);
      digitalWrite(CH3,LOW);    //Release shutter button      
 }