IR sharp sensor with DC motor

Using Arduino Sensors
#1

Hi! So first of ill try to explain the project I am making. I am building a quadcopter with retractable legs. I am using a sharp IR proximity sensor and just a standard dc motor. As motor controller i am using an H bridge and the arduino Uno. The idea is when the sensor picks up something the legs of the quad go down again, and retracts when nothing is detected. I believe this sensor goes to 80cm so with nothing I mean everything after 80cm. The plan afterwards is to also use the gear switch on my remote to manually rectract the legs but thats for later, first I want to figure this out. Baby steps! After doing research below is the code I came up with. However it doesn’t work, could someone please point me in the right direction or what I did wrong? Thanks in advance!

//Motor one
int enA = 6;
int inA = 2;
int inB = 3;
// Sensor
int sensorPin = 0; 

int sensorVal;

void setup() {

  pinMode(enA, OUTPUT);
  pinMode(inA, OUTPUT);
  pinMode(inB, OUTPUT);    
}

void loop() {
  
  digitalWrite(inA, LOW);
  digitalWrite(inB, HIGH);  
  sensorVal= analogRead(sensorPin);
  if(sensorVal<500)
  
 
  {
    digitalWrite(inB, HIGH); 

  } 

  else {
 digitalWrite(inA, LOW);
    
  }
 
}
[code]
#2

You don't seem to be changing anything in the if/ else. You start with inA low and inB high. Then you either set inB high (no change) or inA low (still no change).

I suspect you want inA low and inB high as one option and inA high inB low as the other?

So move these....

digitalWrite(inA, LOW);
digitalWrite(inB, HIGH);

....into the if and the else, with one pair of low/high reversed.

#3

Thank you for that! I also figured out I forgot to tell enA to do anything. So it wasnt sending any signal to the motorcontroller. My new code is

//Motor one
int enA = 6;
int inA = 2;
int inB = 3;
// Sensor
int sensorPin = 0; 

int sensorVal;

void setup() {

 pinMode(enA, OUTPUT);
 pinMode(inA, OUTPUT);
 pinMode(inB, OUTPUT);    
}

void loop() {
 
 
 sensorVal= analogRead(sensorPin);
 if(sensorVal>40)
 

 {
    digitalWrite(enA, HIGH);
   digitalWrite(inB, HIGH);
    digitalWrite(inA, LOW);


 } 

 else {
digitalWrite(inA, HIGH);
    digitalWrite(inB, LOW);
 }

}

Now i need tojust make it stop after x amount of seconds and ill be golden! Thanks again

#4