3-6V DC Motor Micro Motor Miniature Stepper Motor COM41 ,R14

Description

These are standard ‘130 size’ DC hobby motors. They come with a wider operating range than most toy motors: from 4.5 to 9VDC instead of 1.5 to 4.5V. This range makes them perfect for controlling with an Arduino where you are more likely to have 5 or 9V available than a high current 3V setting. They’ll fit in most electronics that already have 130-size motors installed and there’s two breadboard-friendly wires soldered on already for fast prototyping.

Features:

• Operating Temperature: -10°C ~ +60°C
• Rated Voltage: 6.0VDC
• Rated Load: 10 g*cm
• No-load Current: 70 mA max
• No-load Speed: 9100 ±1800 rpm
• Loaded Current: 250 mA max
• Loaded Speed: 4500 ±1500 rpm
• Starting Torque: 20 g*cm
• Starting Voltage: 2.0
• Stall Current: 500mA max
• Weight: 17.5 grams

Getting started 3-6V DC Motor Micro Motor Miniature Stepper Motor

To drive a DC motor you need a larger amount of current than Arduino board can give. For that reason you must use a transistor. Transistors have limits and maximum specs, just be sure those values are enough for your use.
The transistor we are using for this tutorial is P2N2222A and is rated at 40V and 200mA, it just perfect for one toy dc motor.
Note: If your motor needs more current than 200mA you can just buy another transistor (ask the staff in the electronics store). The connections below are the same.
In this tutorial we will spin a dc motor from one direction, with different speed. You will be able to control motor speed from serial monitor!

Step1: Hardware required

For this tutorial you will need:

• Arduino uno
• Breadboard
• 220 Ohm resistor
• Transistor P2N2222A
• Diode 1N4148
• DC Motor

Step2: Connecting the hardware

The Circuit

The connections are easy, see the image above with the breadboard circuit schematic.

Step3: Making the code and Upload it!

/* Control Speed of a DC Motor from serial monitor
   More info: http://www.ardumotive.com/how-to-drive-a-dc-motor-with-transistor.html
   Dev: Vasilakis Michalis // Date: 13/7/2015 // www.ardumotive.com */

//Transistor 'Base' pin or input pin of motor driver ic to Arduino PWM Digital Pin 3
const int motorPin = 3;

int Speed; //Variable to store Speed, by defaul 0 PWM
int flag;

void setup()
{
	pinMode(motorPin, OUTPUT); //Set pin 3 as an OUTPUT
	Serial.begin(9600); //Init serial communication
    //Print a message:
	Serial.println("Give a number from 50 to 255."); //Why minimun value 50? Because with values below 50 the motor doesn't spin ;)
	Serial.println(""); //Blank line
}

void loop()
{	
	//Check if incoming data is available:
    if (Serial.available() > 0)
    {
      // If it is, we'll use parseInt() to pull out only numbers:
      Speed = Serial.parseInt();
      flag=0;
    }

	//Valid range is from 50 to 255
	if (Speed>=50 && Speed<=255){
		//Send PWM value with analogWrite to Arduino pin 3 and print a message to serial monitor
		analogWrite(motorPin, Speed);
	    //Print message only once
	    if (flag==0){ 
	    	//Print PWM value
	    	Serial.print("Motor spinning with ");
	    	Serial.print(Speed);
	    	Serial.println(" PWM");
	    	flag=1;
	    }
	}
	delay(1000);
}
//
Then Upload
Open the serial monitor from tools menu of Arduino IDE and try to send a number from 50 to 255.
The result:
Copy