Connecting Simple DC Motor In Arduino Mega 2560

Introduction:

• In this article I will explain about connecting simple DC Motor in Arduino Mega 2560.
• It can work with the connection of the PN 2222 transistor.

Parts Of Lists:

• Arduino Mega 2560
• DC Motor
• PN2222 Transistor
• Diode
• 270 ohm Resistor
• LED
• Bread Board. 

PN2222 Transistor

• It can be used for low power and medium power amplifying.
• It is frequently used as small-signal transistor.
• It can have the following three pins.
  • First pin = Collector
  • Second pin = Base 
  • Third pin = Emitter
    

                       
Figure 1: PN 2222 Transistor

DC motor:

• DC Motor that converts the direct current electrical power to the mechanical power.
• A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings.
• Small DC motors are used in tools, toys, and appliances.

 
          Figure 2: Dc Motor 

Connection:

Step 1 : Connection From DC motor to board

• Connect the red color wire to the positive of the diode pin
• Connect the black color wire to the negative of the diode pin.
• Connect the negative pin to the interconnect of the transistor of the emitter. 

Step 2 : Connection From Transistor to Board

• Connect the base pin to the digital pin 05 of the Arduino Mega 2560.
• Connect the collector pin to the Gnd of the board. 

Step 3 : LED Connection to Board

• Positive pin to the 12
• Negative pin to the Gnd.

Programming

int motor=5;
int led=12;

void setup()
{
  pinMode(led,OUTPUT);
  pinMode(motor,OUTPUT);
  Serial.begin(9600);
  if(! Serial);
  Serial.println("Speed up to 0 to 255");
}
void loop()
{
  if(Serial.available())
  {
    int speed=Serial.parseInt();
    if(speed >=0 && speed <=255)
    {
      digitalWrite(led,HIGH);
    }
    else {
      digitalWrite(led,LOW);
    }
      analogWrite(motor,speed);
    }
  }

Explanation

• In this article I have explained about the connection of simple DC Motor using Arduino Mega 2560
• Normally the DC motor can run in the high, so it will control and give the limited speed.
• When the DC motor is in high speed, it will glow the LED.
• When the DC motor is in low speed, it cannot glow the LED.  

Output

 
                                     Figure 3 : Output