# Intervalometer for Sony NEX 5n

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## Introduction: Intervalometer for Sony NEX 5n

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

## 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

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
}
else if(value_Y < 500){         // joystick down
pos = 1;
lcd.backlight();              // LCD backlight ON
TimeLCDOff = currentTime;     // new value of TimeLCDOff
}
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;
}
}
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
}
}
}

if(value_Z == 1){               // joystick button press
lcd.backlight();              // LCD backlight ON
TimeLCDOff = currentTime;
if(working == true){
working = false;
pos = 0;
}
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
}

}

{
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:

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## 10 Discussions

parabens, belo post poderia por favor disponibilizar codigo fonte, sou novo com arduino...... abç´s .

I just made this setup and have problems:
this part of code won't work :
pulseON(2336);
pulseOFF(646); .
......
.......
.......
pulseON(99);
pulseOFF(646);

gives error :
intervalometer_v2.ino: In function 'void takePicture()':
intervalometer_v2:167: error: expected primary-expression before '...' token intervalometer_v2:167: error: expected `;' before '...' token

I commented the "......" 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?