CODEWITHSUNDEEP
arduino
Warre Buysse
Warre Buysse

Reputation: 1345

Small air blower (12V DC motor) only buzzing

I'm trying to get my DC Brushless fan (an air blower like this one: https://iprototype.nl/products/components/overige/blower-squirrel-cage ) working.

This is my set-up: (note that the DC motor in the image is my fan)

enter image description here

And this is my code (nothing fancy):

int motorPin = 9;
void setup() { 
    Serial.begin(9600);
  pinMode(motorPin, OUTPUT);
}
void loop() {
  for(int i=0; i < 255; i++) {
  analogWrite(motorPin, i);
  Serial.println(analogRead(motorPin));
  delay(5); 
  }
}

The only thing my air blower is doing is BUZZING. A little "peeeeep" coming out of it, so there is a connection but it doesn't seem to work for some reason.

My battery i'm using is a normal Duracell 9V battery and when I hold the cables of my air blower against the + and - of my battery it works pretty well, so the voltage should be enough.

Would anyone know a solution for this?

Upvotes: 1

Views: 4681

Answers (1)

DotNetRussell
DotNetRussell

Reputation: 9867

First off I would be careful posting this here. There are a TON of trolls that will push you off Stack Overflow because this is an Engineering question.

That said:

First thing I noticed that is wrong.

You are using analogWrite(motorPin, i); but you clearly have it plugged into the digital pins on the Arduino. The pins that are marked A0-A5 are your analog pins.

What you want to use is digitalWrite(pin,value) Arduino Documentation

Second, have you tested this with a multimeter?

I would be concerned with how much current is actually getting to your blower and if it's enough to run it. This really depends on how it is wired. I would suggest using an H-Bridge for anything motor related. You can find them REALLY cheap on sparkfun. I use one from adafruit. You can see an example of it working and how it's wired at http://anthonyrussell.info/postpage.php?name=65 If you could attach an actual photo of your setup that might be a little more useful

Upvotes: 2

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