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====== Photo Interrupter ======

I bought 10 photo interrupters, thinking I might need them to zero stepping motor positions.

uxcell 10 Pcs 1/8 inches Slot PCB Photo Interrupter Slotted Optical Sensor Switch HY860N (No longer available)

{{a4sim:2019-08-20_181819_photointerrupter_schematic.jpg?direct&600|}}

<code c>


#define PI_LED 4

int detectorVal = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(PI_LED, OUTPUT);
  digitalWrite(PI_LED, HIGH);
}

void loop() {
  // put your main code here, to run repeatedly:
  
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(500);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(500);                       // wait for a second
  detectorVal = analogRead(A0);
  Serial.println(detectorVal);
  
}
</code>

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