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This intervalometer used infrared LED

To built intervalometer you need:
Arduino Nano (or Arduino-compability). I used Nano V3
Serial LCD
Joystick Module
IR Led and resistor ~200 Ohm
Switch
Push Button
Plastic enclosure
Battery 9V 

Cost about 30$

Step 1: Schematic

Schematic is very simple

Step 2: Connection

Serial LCD has 4 output: GND, VCC, SDA, SCL. SDA (data) connect to Arduino Analog In 4, SCL (clock) connect to Analog In 5. Vcc connect to 5V Arduino, and GND connect to GND Arduino.

The joystick is connected by five wires: axis X (connect to Analog IN 0), axis Y (to Analog IN 1), axis/button Z (to Digital IN 2), supply Vcc and GND.

Step 3: Assembling

Circuit is powered by 9V battery. Battery positive output connected to the input Vin Arduino. Arduino has a built-5V voltage converter that we need to power the Serial LCD. The anode of the IR LED is connected through current limiting resistor and connected to 10-pin Arduino. Cathode of the IR LED connected to GND.

I use resistor ~200 Ohm, you can calculate it via on-line LED Calculator

Step 4: Software

To save battery life in the software has a function the LCD backlight off. When you press any key, the LCD backlight turn on.

Source Code:

// Article http://english.cxem.net/arduino/arduino6.php
// Version 1.0

#include "Wire.h"
#include "LiquidCrystal_I2C.h"

#define axis_X 0    // axis X of Joystic connected to Analog 0
#define axis_Y 1    // axis Y of Joystic connected to Analog 1
#define axis_Z 2    // axis-button Z of Joystic connected to Digital 2
#define pinIRLED 10 // IR LED
#define LEDgreen 13 // onboard LED

#define autoOFF 10  // autoOFF backlight LCD

LiquidCrystal_I2C lcd(0x27,16,2);    // set the LCD address to 0x27 for a 16 chars and 2 line display

int value_X, value_Y, value_Z = 0;   // axis values
int pos = 0;                         // current position (0 - delay, 1 - work)
int interval = 1;                    // pause between shots (sec)
int cntPict = 0;                     // shots count
boolean working = false;

unsigned long currentTime;
unsigned long TimeShot, TimeLCDOff;

void setup()
{
  pinMode(axis_Z, INPUT);         // Joystic button
  pinMode(pinIRLED, OUTPUT);      // IR LED
  
  lcd.init();                     // init LCD
  lcd.backlight();                // turn LCD backlight ON
  lcd.clear();                    // clear LCD
  show_menu();                    // function show menu
  
  currentTime = millis();
  TimeShot = currentTime;         // shots timer
  TimeLCDOff = currentTime;       // backlight timer
  //Serial.begin(115200);
}

void loop()
{
  value_X = analogRead(axis_X);    // read the analog value of the X axis
  value_Y = analogRead(axis_Y);    // read the analog value of the Y axis
  value_Z = digitalRead(axis_Z);   // read the digital value of the Z axis (button)
  value_Z = value_Z ^ 1;           // invert the value
  
  if(working == false){
    if(value_Y > 540){              // joystick up
      pos = 0;
      lcd.backlight();              // LCD backlight ON
      TimeLCDOff = currentTime;     // new value of TimeLCDOff
      show_menu();
    }
    else if(value_Y < 500){         // joystick down
      pos = 1;
      lcd.backlight();              // LCD backlight ON
      TimeLCDOff = currentTime;     // new value of TimeLCDOff
      show_menu();
    }
    if(value_X > 530){              // joystick left
      lcd.backlight();              // LCD backlight ON
      TimeLCDOff = currentTime;     // new value of TimeLCDOff
      if(pos == 0){
          --interval;
          if(value_X > 900) interval = interval-10;  // joystick full left
          if(interval < 1) interval = 1;
      }
      show_menu();
    }
    else if(value_X < 490){         // joystick right
      lcd.backlight();              // LCD backlight ON
      TimeLCDOff = currentTime;     // new value of TimeLCDOff
      if(pos == 0) {
          ++interval;
          if(value_X < 100) interval = interval+10;  // joystick full right
      }
      show_menu();
    }
  }

  if(value_Z == 1){               // joystick button press
    lcd.backlight();              // LCD backlight ON
    TimeLCDOff = currentTime;
    if(working == true){
      working = false;
      pos = 0;
      show_menu();
    }
    if(pos == 1) show_working();  // turn on work mode
  }
  
  delay(200);
  
  currentTime = millis();
  if(working == true){
    if(currentTime >= (TimeShot + (interval*1000))){
      digitalWrite(LEDgreen, HIGH);                   // blink onboard LED
      delay(100);
      digitalWrite(LEDgreen, LOW);                   
      takePicture();                                  // send IR
      TimeShot = currentTime;
      ++cntPict;                                      // increase the counter shots
      show_working();                                 // refresh LCD
    }
  }
  
  if(currentTime >= (TimeLCDOff + (autoOFF*1000))){            
      lcd.noBacklight();                              // LCD backlight OFF
  }
  
}

void show_menu()
{
  cntPict = 0;        // zero out counter shots
  
  lcd.clear();
  lcd.setCursor(0, pos);
  lcd.print("*");     // current position
  
  lcd.setCursor(1, 0);
  lcd.print("delay:");
  
  lcd.setCursor(8, 0);
  lcd.print(interval);
  
  lcd.setCursor(1, 1);
  lcd.print("go work");
}

void show_working()
{
  lcd.clear();
  lcd.setCursor(3, 0);
  lcd.print("working...");
  lcd.setCursor(2, 1);
  lcd.print("shots:");
  lcd.setCursor(9, 1);
  lcd.print(cntPict);
  working = true;
}

void pulseON(int pulseTime) {
  unsigned long endPulse = micros() + pulseTime;        // create the microseconds to pulse for
  while( micros() < endPulse) {
    digitalWrite(pinIRLED, HIGH);                       // turn IR on
    delayMicroseconds(13);                              // half the clock cycle for 38Khz - e.g. the 'on' part of our wave
    digitalWrite(pinIRLED, LOW);                        // turn IR off
    delayMicroseconds(13);                              // delay for the other half of the cycle to generate wave/ oscillation
  }
}
void pulseOFF(unsigned long startDelay) {
  unsigned long endDelay = micros() + startDelay;       // create the microseconds to delay for
  while(micros() < endDelay);
}
void takePicture() {
  for (int i=0; i < 2; i++) {    // impulse send twice
    pulseON(2336);
    pulseOFF(646);
    .......
    .......
    .......
    pulseON(99);
    pulseOFF(646);
  }
}


Video:

You can download full PDE code and Fritzing project from my site: DOWNLOAD
<p>parabens, belo post poderia por favor disponibilizar codigo fonte, sou novo com arduino...... ab&ccedil;&acute;s . </p>
<strong>I just made this setup and have problems: </strong><br> this part of code won't work :<br> <em>pulseON(2336);<br> pulseOFF(646); .<br> ......<br> .......<br> .......<br> pulseON(99);<br> pulseOFF(646); </em><br> <br> gives error :<br> <em>intervalometer_v2.ino: In function 'void takePicture()':<br> intervalometer_v2:167: error: expected primary-expression before '...' token intervalometer_v2:167: error: expected `;' before '...' token </em><br> <br> I commented the &quot;......&quot; line to get it to upload, the IR led is pulsing now (seen thru an IR camera), but wont trigger the camera. (camera triggers if I use an IR remote).
Could you provide type of LCD (and other bits) please?
I have 2 questions please: <br>_________1. Will it work for BULB mode? ( needs to send 2 signals one after the other to close/open the shutter for the next long exposure picture) <br>[The sequence would be: open for 5 min... close... wait 1 sec... open for 5 min...close... wait 1 sec... open for 5 min...etc] <br>_________2.When I move the button to wake up the LCD will it register a command too? (I hope not) <br>really nice contraption :) <br>thank you
Looks like a nice Intervalometer. What's the make and part number of the joystick module. I'm not an Ardunio person and there seems to be a number of different types out there.
I liked the minimal amount wiring required for the LCD you use. Which LCD screen is it, and what vender did you source it from. For my first arduino project, I am working on an adruino controlled intervalometer for my Sony Alpha. Though I plan to connect mine through the wired remote port. Hopefully I won't become too much of a pest with questions but your guidance is much appreciated.
Do you think this would work for a Sony alpha series? Also considering trying to build a similar one that would connect to the remote port. <br> <br>
Yes, I think it's will works for a Sony Alpha series.
Nice work. Is this being used for photography?
Yes, it use for time-lapse photography

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Bio: I like Electronics, Robots and Arduino!
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