If i put in this code my serial monitor reads the sensor correctly. 1024 when its clear, 0 when its blocked. int led = 13; void setup() { pinMode(led, OUTPUT); Serial.begin(9600); } void loop() { int triggerValue = analogRead(A2); Serial.println(triggerValue); delay(1); …

Something simply I'm sure

system May 13, 2014, 4:26pm 5

That makes complete since. Very good basic explanation.

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