Motion Activated Camera

Posted on Feb 6, 2014

A relatively simple attachment to my Canon SLR to create a motion activated camera using Arduino. A lot of this was based on and inspired by the intervalometer project at The Honey Jar. I made some changes to his circuit to use a 4N35 optocoupler instead of reed relays. Here is what you will need: The motion detector is really sensitive so I cut a small hole in the box to try and and reduce its field of view.

Click here to download the full size of the above Circuit.

This might not be as much of a problem at night, but during the day it would constantly give false positives. /* Motion Activated Camera Dan Bridges 2009 For schematics and more documentation see: */ boolean focus = false; int shutterPin = 2; int focusPin = 3; int PIRPin = 4; int shutterPressDelay = 200; int focusPressDelay = 200; int interPictureDelay = 500; void setup(){ pinMode(shutterPin, OUTPUT); pinMode(focusPin, OUTPUT); } void loop(){ if (digitalRead(PIRPin) { takePicture(); delay(interPictureDelay); } } void takePicture() { //If you want the camera to focus first set //the focus variable to true. if (focus) { digitalWrite(focusPin, HIGH); delay(focusPressDelay); digitalWrite(focusPin, LOW); delay(250); } digitalWrite(shutterPin, HIGH); delay(shutterPressDelay); digitalWrite(shutterPin, LOW); } The same circuit (minus the PIR detector) can also be used as a standard intervalometer. At some point IG ‚¬ ll probably add a potentiometer and a LCD screen to allow for custom time intervals on the go.

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