/*
FakePhysicist.com
admin@fakephysicist.com
19 April 2017
 */


void setup() {
  Serial.begin(9600);
  attachInterrupt(0, record, CHANGE); 
}

int count = 0;

void loop() { }

void record() {
  Serial.print(count++);
  Serial.print(" ");
  Serial.println(micros());
}