## Introduction: Dual Automatic Watch Winder

I have been always wondering why the watch winder devices are so expensive. Such a tool is, however, necessary especially for guys like me who don't wear their watch everyday. So, I decided to make one of my own, using an Arduino controller.

The basic idea is to use a stepper motor in order to rotate my watches. Moreover, by using the Arduino we can control the rotation frequency.

Here are the basic components I have used:

## Step 1: The Schematics

We note that we can use the same power supply (12VDC) for both the Arduino and the EasyDriver. For the Arduino, however, we have to use a step down module in order to achieve an output voltage of 8VDC. Finally, the Arduino is powered via the VIN pin.

## Step 2: Programming the Arduino

I use the following simple code in order to rotate the stepper motor in both directions.

int smDirectionPin = 3; //Direction
int smStepPin = 2; //Stepper

void setup(){
pinMode(smDirectionPin, OUTPUT);
pinMode(smStepPin, OUTPUT);
Serial.begin(9600);
}

void loop(){

digitalWrite(smDirectionPin, HIGH); //Set the rotation direction (HIGH is clockwise).
/*Turns the motor 20000 steps*/
for (int i = 0; i < 20000; i++){
digitalWrite(smStepPin, HIGH);
delayMicroseconds(800);
digitalWrite(smStepPin, LOW);
delayMicroseconds(800);
}

delay(1000); //Pauses for a second

digitalWrite(smDirectionPin, LOW); //Rotation direction (LOW is counter-clockwise).
for (int i = 0; i < 20000; i++){
digitalWrite(smStepPin, HIGH);
delayMicroseconds(800);
digitalWrite(smStepPin, LOW);
delayMicroseconds(800);
}

delay(1000);

}