#Code Example for Arduino Uno const int shutter = 12; // the number of the Shutter pin const int focus = 13; // the number of the Focus pin // Variables will change: long previousMillis = 0; // will store last time Shutter was updated // the follow variables is a long because the time, measured in miliseconds, // will quickly become a bigger number than can be stored in an int. long interval = 5000; // interval at which to fire shutter (milliseconds) long focusDelay = 2000; // interval between focus and shutter boolean focusBool = true; // wether the camera should focus between intervals void setup() { pinMode(shutter, OUTPUT); pinMode(focus, OUTPUT); } void loop() { unsigned long currentMillis = millis(); if(currentMillis - previousMillis > interval- focusDelay && focusBool){ //fire the focus before the shutter digitalWrite(focus, HIGH); digitalWrite(focus, LOW); } if(currentMillis - previousMillis > interval) { // save the last time triggered the the Shutter previousMillis = currentMillis; digitalWrite(shutter, HIGH); digitalWrite(shutter, LOW); } }