int gearcounter = 0;


void setup() {
  Serial.begin(9600);
  pinMode(A1, INPUT); // Ir sensor pin
  pinMode(5, OUTPUT); // Mosfet gate pin

}

void loop() {
    gear10us = analogRead(A1);
    delayMicroseconds(10)
    if (gear10us != analogRead(A1)){
      //gear moving in the last 10 micro seconds
      gearcounter += 1;
    }

    if (gearcounter == 16) {//Maximum gear is 16, I just want to stop it one before the maximum
    gearcounter = 1;
    }


    while(gearcounter < 15){
      digitalWrite(5, HIGH);
    }

}