These days I’ve been on holidays to make some progress on a personal project I have with a friend. We are trying to make a camera dolly to record time lapse videos with our DSLR cameras. The project is powered by an Arduino board, but as my experience with electronics is null, so I decided to make a little test project first as an introduction.
The result is a very simple intervalometer, built with a few components, a potenciometer to adjust the time between shots, an optoisolator to trigger a Canon camera by cable and an IR led to trigger a Nikon camera.
The schematic is the following.
And here is the source code running on the Arduino. I should rewrite it to not make use of the delay function.
#include "NikonRemote.h"
const int potPin = A0;
const int ledPin = 13;
const int irPin = 8;
const int jackPin = 12;
// config values
const int minDelay = 100;
const int blinkLength = 150;
const int canonPulseLength = 40;
NikonRemote camera(irPin);
void setup(){
Serial.begin(9600);
pinMode(ledPin, OUTPUT);
pinMode(jackPin, OUTPUT);
}
void loop() {
int val = (analogRead(potPin) * 20) - blinkLength;
if (val < minDelay) {
val = minDelay;
}
Serial.print("Analog read: ");
Serial.println(val, DEC);
snap();
delay(val);
}
void snap() {
// blink status led
digitalWrite(ledPin, HIGH);
// snap nikon
camera.Snap();
// snap canon
digitalWrite(jackPin, HIGH);
delay(canonPulseLength);
digitalWrite(jackPin, LOW);
// end blink
delay(blinkLength - canonPulseLength);
digitalWrite(ledPin, LOW);
}
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Nice one! Did you try to build a Lightning trigger? (Photoresistor, Arduino & Shutter cable) I’m looking for some… 😉