Why is my LED and pin 7 not working?

Using Arduino Project Guidance
1

Im trying to make it so when the mpu6050 tilts past a certain threshold, it'll turn on the LED that I have plugged in to pin 7, but after awhile of trying I cant get it to do anything at all

#include <MPU6050.h>
#include <Wire.h>

const int ledPin = 7; //pin number for 3x LEDS

MPU6050 mpu;

void setup() {

pinMode(7, OUTPUT);

  Serial.begin(115200);

  Wire.begin();
  mpu.initialize(); //initializes the mpu... duh

  pinMode(ledPin, OUTPUT);

}

void loop() {

  digitalWrite(7, HIGH);
  

  int16_t ax, ay, az;
  mpu.getAcceleration(&ax, &ay, &az);

  float accelX = ax / 16384.0; //} VVVVV
  float accelY = ay / 16384.0; //} Converts the raw values to readable/more understandable ones
  Serial.print("X-axis=");
  Serial.println(accelX); //prints the X axis on the mpu
  Serial.print("Y-axis=");
  Serial.println(accelY); //prints the Y axis on the mpu


  if(accelX < 0.5) {
    digitalWrite(ledPin, HIGH);
  } else{
    digitalWrite(ledPin, LOW);
  }

  delay(50);
  

}
2

Is the LED stuck on? try commenting out (or remove it) this line "digitalWrite(7, HIGH);" in your loop.

3

What does that printout show?

4

it says next to it, prints the X axis on the mpu

5

I will try that now thanks :slight_smile:

6

Railroader is saying value are you actually seeing and if it ever goes below 0.5 to turn your LED off.

7

woops sorry misread that lol, yeah it prints below and above 0.5 to a max of about ~1

8

Just tried the LED again and its still not working

9

Post a schematic/picture or just a drawing is fine, maybe the LED is burned out.

1 Like
10

Just tested and I think its actually my arduino uno thats broken bc this worked when I tried it on a nano, thanks anyway lol :smiley:

1 Like
11

What "broke it" The same thing could also broke your Nano.

12

Do you have a series resistor connected to that LED?

13

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