Arduino high-speed camera trigger

Everything you need to know is in the video. Here's the Arduino code. Be sure to replace [less than] with the correct programming character (youtube doesn't like it in descriptions apparently?)!

/* Sense light incident on the photodiode. If the photodiode current exceeds a certain amount, turn the laser off. Wait, then trigger camera flash [I don't know how to do this yet] Wait more, then turn laser back on and make photodiode sensitive again. Let the potentiometer determine the delay time*/

// By Zack Lasner, May 4, 2011

int potPin = A1;
int detectorPin = A0;
int laserPin = 13;
int flashPin = 12;
int highPin = 8;
// Light level below which flash is triggered
int threshold = 50;

// Time to wait after flash goes off before turning laser back on
int shuttertime = 2500;

// Time to keep flash on
int flashtime = 1;

// For printing light level (to help aiming)
int counter = 0;

void setup(){
Serial.begin(9600);
pinMode(detectorPin, INPUT);
pinMode(potPin, INPUT);
pinMode(flashPin, OUTPUT);
pinMode(laserPin, OUTPUT);
pinMode(highPin, OUTPUT); // Start out with laser on and flash off
digitalWrite(flashPin, LOW);
digitalWrite(laserPin, HIGH);
digitalWrite(highPin, HIGH);
}

void loop(){
// Only stop checking the light sensor if the laser beam is broken
if(analogRead(detectorPin) [less than] threshold){ //Print out light level (to help aiming) Serial.println(analogRead(detectorPin)); // Turn laser off when threshold is breached
digitalWrite(laserPin, LOW); // Wait an amount of time determined by the pot
delay(analogRead(potPin)); // Trigger the flash
digitalWrite(flashPin, HIGH);
delay(flashtime);
digitalWrite(flashPin, LOW); // Wait for camera shutter to close
delay(shuttertime); // Turn laser back on
digitalWrite(laserPin, HIGH);
} // Display incident light level (to help aim)
if(counter % 100 ==0) Serial.println(analogRead(detectorPin));

counter++;

}

Category:

Science & Technology