Multiple Analog Line Follower Sensors – Arduino

 

mcu
Minimized MCU

 

 

Capture
QRD1114 (ACTIVE LOW design), N: number of sensor
  • There are no pull-up resistors, because we can use the internal pull-up of Arduino.
    pinMode(A0, INPUT_PULLUP);
    int reading = analogRead(A0);

     

  • Here, 1k / N are used as the load resistor. Actually (200~1k)/N resistor can be used. (lower resistor -> higher detect range).

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